Temperature

Gas-actuated thermometer
Stainless steel version
Model 73
WIKA data sheet TM 73.01
For further approvals,
see page 10

Applications Configurator

■ General process instrumentation in the chemical and

petrochemical industries, oil and gas industries, energy
and water/wastewater industries
■ Universally suitable for machine building, plant, tank,
equipment manufacturing and food industry Standard
■ Temperature measurement without medium contact article
■ Mounting in instrument panels, control cabinets and
control panels

Special features
■ Scale ranges from -200 ... +700 °C [-328 ... +1,292 °F]
■ Fast response behaviour
■ Case and stem from stainless steel 316
■ Various connection and case mounting designs
■ QR code on dial links to instrument-specific information
Fig. left: lower mount (radial), model R73.100
Fig. centre: with capillary and instrument mounting
bracket, model F73.100
Description Fig. right: back mount (axial), model A73.100

The model 73 gas-actuated thermometer has been With the contact bulb version, temperature measurements
developed and is manufactured in accordance with the are possible without any contact with the medium, even when
EN 13190 standard. This high-quality thermometer has been the pipe diameter is extremely small. The contact bulb is
designed especially for the requirements of the process intended for external mounting on pipes and tanks.
industry. The thermometer, completely manufactured
from stainless steel, is used particularly successfully in When it comes to harsh climatic conditions at the place of
the chemical and petrochemical, oil and gas, and power use, the model 73 is the right choice, as it can be used at
engineering industries. temperatures ranging from -40 °C [-40 °F] ... +60 °C [+140 °F]
(In the POLARgauge® version also to -50 °C [-58 °F] of -70 °C
To allow optimum fitting to the process, individual insertion [-94 °F]).
lengths and process connections are available. The
thermometers have a high ingress protection of IP65 and The QR code on the dial allows instrument-specific
can be used in outdoor applications even at negative information such as the serial number, the order number,
temperatures. With liquid damping operation under high certificates and other product data to be retrieved from the
vibration conditions is possible. Due to the wide variety of internet easily and in the long term.
possible designs, the model 73 gas-actuated thermometers
can be perfectly adapted to any process connection or
location.

WIKA data sheet TM 73.01 ∙ 08/2025 Page 1 of 23

Specifications

Basic information
Standard EN 13190
Nominal size ■ 100 mm [4"]
■ 160 mm [6"]

Window ■ Laminated safety glass

■ Polycarbonate

Connection location
A73.1x0 Back mount (axial)
R73.1x0 Lower mount (radial)
S73.1x0 Back mount, adjustable stem and dial
F73.1x0 Version with capillary
Connection designs
S Standard (threaded connection) 1)
1 Plain stem (without thread)
2 Rotatable connection
3 Union nut
4 Compression fitting (sliding on stem)
5 Union nut and loose threaded connection
6 Compression fitting (can be adjusted on either capillary or spiral protective sleeve)
7 Compression fitting on the case 1)
“Adjustable stem and dial” case version Swivelling 90° and rotatable 360°
Damping ■ With liquid damping (silicone oil)
■ With food-compatible liquid damping

Materials (non-wetted)
Case, bayonet bezel Stainless steel 304
Pointer Aluminium, black, micro adjustment
Articulated joint “adjustable stem and dial” Stainless steel 304
Dial Aluminium (white)
1) Not applicable to version with capillary

Measuring element
Type of measuring element Gas-pressure inert gas filling, physiologically safe
Working range
Constant loading (1 year) Measuring range per EN 13190
Short time (max. 24 h) Scale range per EN 13190
Movement materials ■ Combination of brass and stainless steel
■ Completely from stainless steel

Capillary
Diameter ∅ 2 mm [0.08 in]
Spiral protective sleeve ∅ 7 mm [0.28 in]
Length Capillary without spiral protective sleeve Max. 60 m [197 ft]
Capillary with spiral protective sleeve Max. 40 m [131 ft]
Capillary with spiral protective sleeve and PVC coating Max. 20 m [66 ft]
Minimum bending radius Capillary without spiral protective sleeve 6 mm [0.24 in]
Capillary with spiral protective sleeve 20 mm [0.79 in]
Capillary with spiral protective sleeve and PVC coating 30 mm [1.18 in]
Material Stainless steel 316

WIKA data sheet TM 73.01 ∙ 08/2025 Page 2 of 23

 Measuring element
Mounting options for instruments with capillary ■ Surface mounting flange, stainless steel
■ Instrument mounting bracket, aluminium die-casting
■ Panel mounting flange, stainless steel
■ Triangular profile ring with clamp, stainless steel
Contact bulb
Dimensions 120 x 22 x 12 mm [4.72 x 4.8 x 0.47 in]
Mounting types ■ Mounting on pipes
■ Mounting on tanks

Material Stainless steel 316

Accuracy specifications
Accuracy class Class 1 per EN 13190
at 23 °C ±10 °C ambient temperature

Scale range in °C Measuring range in Scale interval in °C Error limit in accordance with
°C 1) EN 13190 ±°C
-200 ... +50 -170 ... +20 5 5
-200 ... +100 -170 ... +70 5 5
-110 ... +50 -90 ... +30 2 2
-80 ... +60 -60 ... +40 2 2
-60 ... +40 -50 ... +30 1 1
-50 ... +50 -40 ... +40 1 1
-50 ... +100 -30 ... +80 2 2
-50 ... +150 -30 ... +130 2 2
-40 ... +60 -30 ... +50 1 1
-30 ... +50 -20 ... +40 1 1
-20 ... +40 -10 ... +30 1 1
-20 ... +60 -10 ... +50 1 1
-20 ... +80 -10 ... +70 1 1
-20 ... +180 0 ... +160 2 2
-10 ... +100 0 ... +90 1 1
0 ... 60 10 ... 50 1 1
0 ... 80 10 ... 70 1 1
0 ... 100 10 ... 90 1 1
0 ... 120 10 ... 110 2 2
0 ... 160 20 ... 140 2 2
0 ... 200 20 ... 180 2 2
0 ... 250 30 ... 220 5 2.5
0 ... 300 30 ... 270 5 5
0 ... 400 50 ... 350 5 5
0 ... 500 50 ... 450 5 5
0 ... 600 100 ... 500 10 10
0 ... 700 100 ... 600 10 10
50 ... 650 150 ... 550 10 10
1) The measuring range is indicated on the dial by two triangular marks. Only within this range is the stated error limit valid per EN 13190.

WIKA data sheet TM 73.01 ∙ 08/2025 Page 3 of 23

Further details on: scale range
Unit ■ °C
■ °F
■ °C/°F (dual scale)

Dial
Scale graduation ■ Single scale
■ Dual scale

Scale colour Single scale Black

Dual scale Red
→ Other colours on request

Process connection
Thread size ■ Plain, without thread
■ G½B
■ ½ NPT
■ G ½ female
■ ½ NPT female
■ M20 x 1.5
■ M24 x 1.5 female
→ Other threads on request
Materials (wetted) Stainless steel 316
Stem
Diameter ■ 6 mm [0.24 in]
■ 8 mm [0.32 in]
■ 10 mm [0.39 in]
■ 12 mm [0.47 in]
Thermowell/protection tube In principle, the operation of a mechanical thermometer is possible without a thermow-
ell/protection tube with low process-side loading (low pressure, low viscosity and low
flow rates).

However, in order to enable exchanging the thermometer during operation (e.g. instru-
ment replacement or calibration) and to ensure a better protection of the instrument
and also the plant and the environment, it is advisable to use a thermowell/protection
tube from the extensive WIKA thermowell/protection tube portfolio.
→ For further information on the wake frequency calculation of the thermowell/protec-
tion tube, see technical information IN 00.15.

Operating conditions
Ambient temperature (on the case) ■ -40 ... +60 °C [-40 ... +140 °F]
■ -50 ... +60 °C [-58 ... +140 °F] (extended range)
■ -70 ... +60 °C [-94 ... +140 °F] ( version)
Storage temperature
Without liquid damping -50 ... +70 °C [-58 ... +158 °F]
With liquid damping -40 ... +70 °C [-40 ... +158 °F]
Max. operating pressure at the stem Max. 25 bar [363 psi], static
Ingress protection per IEC/EN 60529 ■ IP65
■ IP66

WIKA data sheet TM 73.01 ∙ 08/2025 Page 4 of 23

Design 1 2 and 3 4 and 5 S
Stem diameter 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10
in mm [in] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40]
Scale range in °C Minimum insertion length in mm [in]
Models A73 (back mount) and R73 (lower mount)
-200 ... +50 80 80 80 70 70 70 60 60 60 75 75 75
[3.15] [3.15] [3.15] [2.76] [2.76] [2.76] [2.36] [2.36] [2.36] [2.95] [2.95] [2.95]
-200 ... +100 80 80 80 70 70 70 60 60 60 75 75 75
[3.15] [3.15] [3.15] [2.76] [2.76] [2.76] [2.36] [2.36] [2.36] [2.95] [2.95] [2.95]
-110 … +50 75 60 60 60 60 60 60 60 60 60 60 60
[2.95] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36]
-80 ... +60 95 60 60 95 60 60 90 60 60 110 75 75
[3.74] [2.36] [2.36] [3.74] [2.36] [2.36] [3.54] [2.36] [2.36] [4.33] [2.95] [2.95]
-60 ... +40 105 70 60 105 70 60 100 65 60 120 85 75
[4.13] [2.76] [2.36] [4.13] [2.76] [2.36] [3.94] [2.56] [2.36] [4.72] [3.35] [2.95]
-50 … +50 100 70 60 80 60 60 90 60 60 90 60 60
[3.94] [2.76] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36] [3.54] [2.36] [2.36]
-50 … +100 85 60 60 60 60 60 75 60 60 75 60 60
[3.35] [2.36] [2.36] [2.36] [2.36] [2.36] [2.95] [2.36] [2.36] [2.95] [2.36] [2.36]
-50 … +150 75 60 60 60 60 60 60 60 60 60 60 60
[2.95] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36]
-40 ... +60 105 70 60 105 70 60 100 65 60 120 85 75
[4.13] [2.76] [2.36] [4.13] [2.76] [2.36] [3.94] [2.56] [2.36] [4.72] [3.35] [2.95]
-30 ... +50 125 75 60 125 75 60 120 70 60 140 90 75
[4.92] [2.95] [2.36] [4.92] [2.95] [2.36] [4.72] [2.76] [2.36] [5.51] [3.54] [2.95]
-20 ... +40 135 90 65 115 65 60 125 75 60 125 80 60
[5.31] [3.54] [2.56] [4.53] [2.56] [2.36] [4.92] [2.95] [2.36] [4.92] [3.15] [2.36]
-20 ... +60 125 85 60 125 85 60 120 80 60 140 100 75
[4.92] [3.35] [2.36] [4.92] [3.35] [2.36] [4.72] [3.15] [2.36] [5.51] [3.94] [2.95]
-20 ... +80 105 70 60 105 70 60 100 65 60 120 85 75
[4.13] [2.76] [2.36] [4.13] [2.76] [2.36] [3.94] [2.56] [2.36] [4.72] [3.35] [2.95]
-20 … +180 75 60 60 60 60 60 60 60 60 65 60 60
[2.95] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.56] [2.36] [2.36]
-10 … +100 100 70 60 80 60 60 90 60 60 90 60 60
[3.74] [2.76] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36] [3.54] [2.36] [2.36]
0 ... 60 145 95 70 120 70 60 130 80 60 135 85 60
[5.71] [3.74] [2.76] [4.72] [2.76] [2.36] [5.12] [3.15] [2.36] [5.31] [3.35] [2.36]
0 ... 80 125 85 60 125 85 60 120 80 60 140 100 75
[4.92] [3.35] [2.36] [4.92] [3.35] [2.36] [4.72] [3.15] [2.36] [5.51] [3.94] [2.95]
0 ... 100 115 75 60 115 75 60 110 70 60 130 90 75
[4.53] [2.95] [2.36] [4.53] [2.95] [2.36] [4.33] [2.76] [2.36] [5.12] [3.54] [2.95]
0 ... 120 95 70 60 95 70 60 90 65 60 110 85 75
[3.74] [2.76] [2.36] [3.74] [2.76] [2.36] [3.54] [2.56] [2.36] [4.33] [3.35] [2.95]
0 ... 160 95 60 60 95 60 60 90 60 60 110 75 75
[3.74] [2.36] [2.36] [3.74] [2.36] [2.36] [3.54] [2.36] [2.36] [4.33] [2.95] [2.95]
0 ... 200 95 60 60 95 60 60 90 60 60 110 75 75
[3.74] [2.36] [2.36] [3.74] [2.36] [2.36] [3.54] [2.36] [2.36] [4.33] [2.95] [2.95]
0 ... 250 75 60 60 75 60 60 70 60 60 90 75 75
[2.95] [2.36] [2.36] [2.95] [2.36] [2.36] [2.76] [2.36] [2.36] [3.54] [2.95] [2.95]
0 ... 300 105 90 90 95 80 80 70 60 60 90 75 75
[4.13] [3.54] [3.54] [3.74] [3.15] [3.15] [2.76] [2.36] [2.36] [3.54] [2.95] [2.95]
0 ... 400 105 90 90 95 80 80 70 60 60 90 75 75
[4.13] [3.54] [3.54] [3.74] [3.15] [3.15] [2.76] [2.36] [2.36] [3.54] [2.95] [2.95]
0 ... 500 165 130 130 155 120 120 125 90 90 150 115 115
[6.50] [5.12] [5.12] [6.10] [4.72] [4.72] [4.92] [3.54] [3.54] [5.91] [4.53] [4.53]
0 ... 600 145 130 130 135 120 120 105 90 90 130 115 115
[5.71] [5.12] [5.12] [5.31] [4.72] [4.72] [4.13] [3.54] [3.54] [5.12] [4.53] [4.53]
0 ... 700 155 135 130 125 105 105 115 95 95 140 120 120
[6.10] [5.31] [5.12] [4.92] [4.13] [4.13] [4.53] [3.74] [3.74] [5.51] [4.72] [4.72]
50 ... 650 155 130 130 125 100 100 115 90 90 140 115 115
[6.10] [5.12] [5.12] [4.92] [3.94] [3.94] [4.53] [3.54] [3.54] [5.51] [4.53] [4.53]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 5 of 23

Design 1 2 and 3 4 and 5 S
Stem diameter 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10
in mm [in] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40]
Scale range in °C Minimum insertion length in mm [in]
Model S73 (back mount, adjustable stem and dial)
-200 ... +50 60 60 60 60 60 60 60 60 60 65 65 65
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.56] [2.56] [2.56]
-200 ... +100 60 60 60 60 60 60 60 60 60 65 65 65
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.56] [2.56] [2.56]
-110 … +50 60 60 60 60 60 60 60 60 60 75 60 60
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.95] [2.36] [2.36]
-80 ... +60 80 60 60 80 60 60 90 60 60 100 65 65
[3.15] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.56]
-60 ... +40 90 60 60 90 60 60 100 65 60 110 75 65
[3.54] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.36] [4.33] [2.95] [2.56]
-50 … +50 85 60 60 85 60 60 90 60 60 100 70 60
[3.35] [2.36] [2.36] [3.35] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.76] [2.36]
-50 … +100 70 60 60 70 60 60 75 60 60 85 60 60
[2.76] [2.36] [2.36] [2.76] [2.36] [2.36] [2.95] [2.36] [2.36] [3.35] [2.36] [2.36]
-50 … +150 60 60 60 60 60 60 60 60 60 70 60 60
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.76] [2.36] [2.36]
-40 ... +60 90 60 60 90 60 60 100 65 60 110 75 65
[3.54] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.36] [4.33] [2.95] [2.56]
-30 ... +50 110 60 60 110 60 60 120 70 60 130 80 65
[4.33] [2.36] [2.36] [4.33] [2.36] [2.36] [4.72] [2.76] [2.36] [5.12] [3.15] [2.56]
-20 ... +40 120 75 60 120 75 60 125 75 60 135 85 60
[4.72] [2.95] [2.36] [4.72] [2.95] [2.36] [4.92] [2.95] [2.36] [5.31] [3.35] [2.36]
-20 ... +60 110 70 60 110 70 60 120 80 60 130 90 65
[4.33] [2.76] [2.36] [4.33] [2.76] [2.36] [4.72] [3.15] [2.36] [5.12] [3.54] [2.56]
-20 ... +80 90 60 60 90 60 60 100 65 60 110 75 65
[3.54] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.36] [4.33] [2.95] [2.56]
-20 … +180 60 60 60 60 60 60 60 60 60 75 60 60
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.95] [2.36] [2.36]
-10 … +100 85 60 60 85 60 60 90 60 60 100 70 60
[3.35] [2.36] [2.36] [3.35] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.76] [2.36]
0 ... 60 130 80 60 130 80 60 130 80 60 140 90 65
[5.12] [3.15] [2.36] [5.12] [3.15] [2.36] [5.12] [3.15] [2.36] [5.51] [3.54] [2.56]
0 ... 80 110 70 60 110 70 60 120 80 60 130 90 65
[4.33] [2.76] [2.36] [4.33] [2.76] [2.36] [4.72] [3.15] [2.36] [5.12] [3.54] [2.56]
0 ... 100 100 60 60 100 60 60 110 70 60 120 80 65
[3.94] [2.36] [2.36] [3.94] [2.36] [2.36] [4.33] [2.76] [2.36] [4.72] [3.15] [2.56]
0 ... 120 80 60 60 80 60 60 90 65 60 100 75 65
[3.15] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.56] [2.36] [3.94] [2.95] [2.56]
0 ... 160 80 60 60 80 60 60 90 60 60 100 65 65
[3.15] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.56]
0 ... 200 80 60 60 80 60 60 90 60 60 100 65 65
[3.15] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.56] [2.56]
0 ... 250 60 60 60 60 60 60 70 60 60 80 65 65
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.56] [2.56]
0 ... 300 60 60 60 60 60 60 70 60 60 80 65 65
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.56] [2.56]
0 ... 400 60 60 60 60 60 60 70 60 60 80 65 65
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.56] [2.56]
0 ... 500 120 85 85 120 85 85 90 60 60 135 100 100
[4.72] [3.35] [3.35] [4.72] [3.35] [3.35] [3.54] [2.36] [2.36] [5.31] [3.94] [3.94]
0 ... 600 100 85 85 100 85 85 70 60 60 115 100 100
[3.94] [3.35] [3.35] [3.94] [3.35] [3.35] [2.76] [2.36] [2.36] [4.53] [3.94] [3.94]
0 ... 700 115 90 85 100 80 80 75 60 60 125 115 100
[4.53] [3.54] [3.35] [3.94] [3.15] [3.15] [2.95] [2.36] [2.36] [4.92] [4.53] [3.94]
50 ... 650 110 85 85 100 75 75 75 60 60 125 100 100
[4.33] [3.35] [3.35] [3.94] [2.95] [2.95] [2.95] [2.36] [2.36] [4.92] [3.94] [3.94]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 6 of 23

Design 1 2 and 3 4 and 5 S
Stem diameter 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10
in mm [in] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40]
Scale range in °C Minimum insertion length in mm [in]
Model F73 (capillary ≤ 5 m [16 ft])
-200 ... +50 95 70 70 90 65 65 80 60 60 - - -
[3.74] [2.76] [2.76] [3.54] [2.56] [2.56] [3.15] [2.36] [2.36]
-200 ... +100 95 70 70 90 65 65 80 60 60 - - -
[3.74] [2.76] [2.76] [3.54] [2.56] [2.56] [3.15] [2.36] [2.36]
-110 … +50 60 60 60 60 60 60 75 60 60 - - -
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.95] [2.36] [2.36]
-80 … +60 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
-60 … +40 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-50 … +50 70 60 60 70 60 60 80 60 60 - - -
[2.76] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.36] [2.36]
-50 … +100 70 60 60 70 60 60 80 60 60 - - -
[2.76] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.36] [2.36]
-50 …+150 60 60 60 60 60 60 70 60 60 - - -
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.76] [2.36] [2.36]
-40 … +60 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-30 … +50 145 105 75 140 100 70 130 90 60 - - -
[5.71] [4.13] [2.95] [5.51] [3.94] [2.76] [5.12] [3.54] [2.36]
-20 ... +40 140 80 60 140 80 60 150 90 60 - - -
[5.51] [3.15] [2.36] [5.51] [3.15] [2.36] [5.91] [3.54] [2.36]
-20 … +60 145 105 75 140 100 70 130 90 60 - - -
[5.71] [4.13] [2.95] [5.51] [3.94] [2.76] [5.12] [3.54] [2.36]
-20 … +80 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-20 …+180 60 60 60 60 60 60 75 60 60 - - -
[2.36] [2.36] [2.36] [2.36] [2.36] [2.36] [2.95] [2.36] [2.36]
-10 …+100 85 60 60 85 60 60 95 60 60 - - -
[3.35] [2.36] [2.36] [3.35] [2.36] [2.36] [3.74] [2.36] [2.36]
0 … 60 125 70 60 125 75 60 135 85 60 - - -
[4.92] [2.76] [2.36] [4.92] [2.95] [2.36] [5.31] [3.35] [2.36]
0 … 80 155 105 75 150 100 70 140 90 60 - - -
[6.10] [4.13] [2.95] [5.91] [3.94] [2.76] [5.51] [3.54] [2.36]
0 … 100 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 … 120 125 85 70 120 80 65 110 70 60 - - -
[4.92] [3.35] [2.76] [4.72] [3.15] [2.56] [4.33] [2.76] [2.36]
0 … 160 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
0 … 200 105 80 70 100 75 65 90 65 60 - - -
[4.13] [3.15] [2.76] [3.94] [2.95] [2.56] [3.54] [2.56] [2.36]
0 … 250 105 70 70 100 65 65 90 60 60 - - -
[4.13] [2.76] [2.76] [3.94] [2.56] [2.56] [3.54] [2.36] [2.36]
0 ... 300 95 70 70 90 65 65 80 60 60 - - -
[3.74] [2.76] [2.76] [3.54] [2.56] [2.56] [3.15] [2.36] [2.36]
0 ... 400 95 70 70 90 65 65 80 60 60 - - -
[3.74] [2.76] [2.76] [3.54] [2.56] [2.56] [3.15] [2.36] [2.36]
0 ... 500 115 70 70 110 65 65 100 60 60 - - -
[4.53] [2.76] [2.76] [4.33] [2.56] [2.56] [3.94] [2.36] [2.36]
0 ... 600 95 70 70 90 65 65 80 60 60 - - -
[3.74] [2.76] [2.76] [3.54] [2.56] [2.56] [3.15] [2.36] [2.36]
0 ... 700 70 60 60 70 60 60 80 60 60 - - -
[2.76] [2.36] [2.36] [2.76] [2.36] [2.36] [3.15] [2.36] [2.36]
50 ... 650 70 60 60 75 60 60 85 60 60 - - -
[2.76] [2.36] [2.36] [2.95] [2.36] [2.36] [3.35] [2.36] [2.36]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 7 of 23

Design 1 2 and 3 4 and 5 S
Stem diameter 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10
in mm [in] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40]
Scale range in °C Minimum insertion length in mm [in]
Model F73 (capillary > 5 ... 10 m [16 ... 33 ft])
-200 ... +50 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
-200 ... +100 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
-110 … +50 80 60 60 80 60 60 90 60 60 - - -
[3.15] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36]
-80 … +60 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-60 … +40 155 105 75 150 100 70 140 90 60 - - -
[6.10] [4.13] [2.95] [5.91] [3.94] [2.76] [5.51] [3.54] [2.36]
-50 … +50 105 60 60 105 60 60 115 75 60 - - -
[4.13] [2.36] [2.36] [4.13] [2.36] [2.36] [4.53] [2.95] [2.36]
-50 …+100 90 60 60 90 60 60 100 60 60 - - -
[3.54] [2.36] [2.36] [3.54] [2.36] [2.36] [3.94] [2.36] [2.36]
-50 …+150 75 60 60 80 60 60 90 60 60 - - -
[2.95] [2.36] [2.36] [3.15] [2.36] [2.36] [3.54] [2.36] [2.36]
-40 … +60 155 105 75 150 100 70 140 90 60 - - -
[6.10] [4.13] [2.95] [5.91] [3.94] [2.76] [5.51] [3.54] [2.36]
-30 … +50 165 115 85 160 110 80 150 100 70 - - -
[6.50] [4.53] [3.35] [6.30] [4.33] [3.15] [5.91] [3.94] [2.76]
-20 ... +40 140 80 60 140 80 60 150 90 60
[5.51] [3.15] [2.36] [5.51] [3.15] [2.36] [5.91] [3.54] [2.36]
-20 … +60 175 115 85 170 110 80 160 100 70 - - -
[6.89] [4.53] [3.35] [6.69] [4.33] [3.15] [6.30] [3.94] [2.76]
-20 … +80 155 105 75 150 100 70 140 90 60 - - -
[6.10] [4.13] [2.95] [5.91] [3.94] [2.76] [5.51] [3.54] [2.36]
-20 …+180 80 60 60 85 60 60 90 60 60 - - -
[3.15] [2.36] [2.36] [3.35] [2.36] [2.36] [3.54] [2.36] [2.36]
-10 …+100 105 60 60 105 60 60 115 75 60 - - -
[4.13] [2.36] [2.36] [4.13] [2.36] [2.36] [4.53] [2.95] [2.36]
0 … 60 140 80 60 140 85 60 155 95 60 - - -
[5.51] [3.15] [2.36] [5.51] [3.35] [2.36] [6.10] [3.74] [2.36]
0 … 80 175 115 85 170 110 80 160 100 70 - - -
[6.89] [4.53] [3.35] [6.69] [4.33] [3.15] [6.30] [3.94] [2.76]
0 … 100 155 105 85 150 100 80 140 90 70 - - -
[6.10] [4.13] [3.35] [5.91] [3.94] [3.15] [5.51] [3.54] [2.76]
0 … 120 145 105 75 140 100 70 130 90 60 - - -
[5.71] [4.13] [2.95] [5.51] [3.94] [2.76] [5.12] [3.54] [2.36]
0 … 160 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 … 200 125 85 70 120 80 65 110 70 60 - - -
[4.92] [3.35] [2.76] [4.72] [3.15] [2.56] [4.33] [2.76] [2.36]
0 … 250 125 85 70 120 80 65 110 70 60 - - -
[4.92] [3.35] [2.76] [4.72] [3.15] [2.56] [4.33] [2.76] [2.36]
0 ... 300 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
0 ... 400 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
0 ... 500 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 ... 600 115 80 70 110 75 65 100 65 60 - - -
[4.53] [3.15] [2.76] [4.33] [2.95] [2.56] [3.94] [2.56] [2.36]
0 ... 700 95 60 60 95 60 60 105 60 60 - - -
[3.74] [2.36] [2.36] [3.74] [2.36] [2.36] [4.13] [2.36] [2.36]
50 ... 650 100 60 60 100 60 60 110 65 60 - - -
[3.94] [2.36] [2.36] [3.94] [2.36] [2.36] [4.33] [2.56] [2.36]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 8 of 23

 Design 1 2 and 3 4 and 5 S
Stem diameter 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10 6 8 ≥ 10
in mm [in] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40] [0.24] [0.32] [0.40]
Scale range in °C Minimum insertion length in mm [in]
Model F73 (capillary > 10 ... 15 m [33 ... 49 ft])
-200 ... +50 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-200 ... +100 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
-110 …+50 105 60 60 105 60 60 115 75 60 - - -
[4.13] [2.36] [2.36] [4.13] [2.36] [2.36] [4.53] [2.95] [2.36]
-80 … +60 155 105 85 150 100 80 140 90 70 - - -
[6.10] [4.13] [3.35] [5.91] [3.94] [3.15] [5.51] [3.54] [2.76]
-60 … +40 175 115 85 170 110 80 160 100 70 - - -
[6.89] [4.53] [3.35] [6.69] [4.33] [3.15] [6.30] [3.94] [2.76]
-50 … +50 130 75 60 130 75 60 140 85 60 - - -
[5.12] [2.95] [2.36] [5.12] [2.95] [2.36] [5.51] [3.35] [2.36]
-50 … +100 115 65 60 115 70 60 125 80 60 - - -
[4.53] [2.56] [2.36] [4.53] [2.76] [2.36] [4.92] [3.15] [2.36]
-50 … +150 100 60 60 105 60 60 115 70 60 - - -
[3.94] [2.36] [2.36] [4.13] [2.36] [2.36] [4.53] [2.76] [2.36]
-30 … +50 185 125 95 180 120 90 170 110 80 - - -
[7.28] [4.92] [3.74] [7.09] [4.72] [3.54] [6.69] [4.33] [3.15]
-20 ... +40 160 95 60 165 95 60 175 105 70 - - -
[6.30] [3.74] [2.36] [6.50] [3.74] [2.36] [6.89] [4.13] [2.76]
-20 … +60 185 125 95 180 120 90 170 110 80 - - -
[7.28] [4.92] [3.74] [7.09] [4.72] [3.54] [6.69] [4.33] [3.15]
-20 … +80 175 115 85 170 110 80 160 100 70 - - -
[6.89] [4.53] [3.35] [6.69] [4.33] [3.15] [6.30] [3.94] [2.76]
-20 … +180 105 60 60 105 60 60 115 75 60 - - -
[4.13] [2.36] [2.36] [4.13] [2.36] [2.36] [4.53] [2.95] [2.36]
-10 … +100 125 75 60 130 75 60 140 85 60 - - -
[4.92] [2.95] [2.36] [5.12] [2.95] [2.36] [5.51] [3.35] [2.36]
0 … 60 165 95 60 165 95 60 175 105 70 - - -
[6.50] [3.74] [2.36] [6.50] [3.74] [2.36] [6.89] [4.13] [2.76]
0 … 80 195 125 95 190 120 90 180 110 80 - - -
[7.68] [4.92] [3.74] [7.48] [4.72] [3.54] [7.09] [4.33] [3.15]
0 … 100 175 115 85 170 110 80 160 100 70 - - -
[6.89] [4.53] [3.35] [6.69] [4.33] [3.15] [6.30] [3.94] [2.76]
0 … 120 165 115 85 160 110 80 150 100 70 - - -
[6.50] [4.53] [3.35] [6.30] [4.33] [3.15] [5.91] [3.94] [2.76]
0 … 160 155 105 85 150 100 80 140 90 70 - - -
[6.10] [4.13] [3.35] [5.91] [3.94] [3.15] [5.51] [3.54] [2.76]
0 … 200 145 105 75 140 100 70 130 90 60 - - -
[5.71] [4.13] [2.95] [5.51] [3.94] [2.76] [5.12] [3.54] [2.36]
0 … 250 145 95 75 140 90 70 130 80 60 - - -
[5.71] [3.74] [2.95] [5.51] [3.54] [2.76] [5.12] [3.15] [2.36]
0 ... 300 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 ... 400 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 ... 500 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 ... 600 135 95 70 130 90 65 120 80 60 - - -
[5.31] [3.74] [2.76] [5.12] [3.54] [2.56] [4.72] [3.15] [2.36]
0 ... 700 130 60 60 130 70 60 140 75 60 - - -
[5.12] [2.36] [2.36] [5.12] [2.76] [2.36] [5.51] [2.95] [2.36]
50 ... 650 135 65 60 135 70 60 145 80 60 - - -
[5.31] [2.56] [2.36] [5.31] [2.76] [2.36] [5.71] [3.15] [2.36]

The technical feasibility of minimum insertion lengths in combination with capillary > 15 m [49 ft] should be tested beforehand.

WIKA data sheet TM 73.01 ∙ 08/2025 Page 9 of 23

Optional approvals
Logo Description Country
EU declaration of conformity European Union
ATEX directive
Hazardous areas
Zone 1 gas II 2G Ex h IIC T6 ... T1 Gb X
Zone 21 dust II 2D Ex h IIIC T85 ... T450 °C Db X
EAC Eurasian Economic
Community
EMC directive
Hazardous areas
Zone 1 gas I Ex h IIC T6 ... T1 Gb X
Zone 21 dust Ex h T85°C ... T450°C Db X

- MChS Kazakhstan
Permission for commissioning
- PAC Ukraine Ukraine
Metrology, measurement technology

Certificates

Certificates
Certificates ■ 2.2 test report
■ 3.1 inspection certificate

Calibration DAkkS calibration certificate

→ For approvals and certificates, see websitew

WIKA data sheet TM 73.01 ∙ 08/2025 Page 10 of 23

Connection locations
Legend
G Connection thread
i Thread length (incl. collar)
∅ d4 Diameter of the sealing collar
SW Spanner width
∅d Stem diameter
l1 Insertion length
l2 Active length
F xx Clearance to stem
LF Capillary length

Model A73, back mount NS ∅ D1 in mm [in]

100 101 [3.98]
50
[1.969] 160 161 [6.34]

Design F BM 1) Connection
S 30 [1.18] G 1/2 - male
⌀d

⌀D1

1 13 [0.51] ∅ 18
2 35 [1.38] G 1/2 - male
3 15 [0.59] G 1/2 - female
l1 F BM ≈2 4 53 [2.09] G 1/2 - male
[0.079]
5 50 [1.97] G 1/2 - male
14634800.01 7 53 [2.09] G 1/2 - male
1) Additionally + 40 mm [1.57 in] for instruments with end of scale range:
>= 300 °C [572 °F], start of scale range: -200 °C [-328 °F]

Model R73, lower mount 50 NS ∅ D1 in mm [in]

[1.969]
100 101 [3.98]
160 161 [6.34]

Design F LM 1) Connection
⌀D1

S 30 [1.18] G 1/2 - male

1 13 [0.51] ∅ 18
F LM

2 35 [1.38] G 1/2 - male

18,5 3 15 [0.59] G 1/2 - female
[0.728]
4 53 [2.09] G 1/2 - male
l1

5 50 [1.97] G 1/2 - male

7 53 [2.09] G 1/2 - male
⌀d
14634801.01 1) Additionally + 40 mm [1.57 in] for instruments with end of scale range:
>= 300 °C [572 °F], start of scale range: -200 °C [-328 °F]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 11 of 23

Model S73, back mount, adjustable stem and dial NS ∅ D1 in mm [in]
100 101 [3.98]
45 50
[1.77] [1.969] 160 161 [6.34]

Design F DS Connection
S 17.5 [0.69] G 1/2 - male

⌀D1
1 28 [1.10] ∅ 18

[1.456]
2 38 [1.50] G 1/2 - male
37
F DS 3 30 [1.18] G 1/2 - female
4 68 [2.68] G 1/2 - male
68 [2.68] G 1/2 - male
5 55 [2.17] G 1/2 - male
l1

7 68 [2.68] G 1/2 - male

⌀d

WIKA data sheet TM 73.01 ∙ 08/2025 Page 12 of 23

Connection designs for back mount, lower mount and back mount adjustable stem and dial

Design: standard (male threaded connection) Design 1, plain stem (without thread)

3073050.07

3073050.07
SW

⌀d4

⌀d1
G

⌀d
⌀d
l2
i l2 F xx l1

F xx l1

Process Dimensions in mm [in] Dimensions in mm [in]

connection
Ø d1
G i SW d4
18 [0.7]
G½B 14 [0.55] 27 [1.06] 26 [1.02]
Standard insertion = 100, 140, 200, 240, 290 mm
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
length l1 [3.94, 5.12, 7.87, 9.45, 11.42 in]
½ NPT 19 [0.75] 22 [0.87] - Basis for design 4, compression fitting
¾ NPT 20 [0.79] 30 [1.18] -

Standard insertion length l1 = 63, 100, 160, 200, 250 mm

[2.48, 3.94, 6.3, 7.87, 9.84 in]

Design 2, rotatable connection Design 3, union nut

3073050.07

3073050.07
⬡ SW
⬡ SW
G

⌀d

⌀d
i l2
G

F xx l1 i l2
F xx l1

Process connection Dimensions in mm [in] Process connec- Dimensions in mm [in]

G i SW tion

G½B 20 [0.79] 27 [1.06] G i SW

M18 x 1.5 15 [0.59] 22 [0.89] G½B 14 [0.55] 27 [1.06]
G¾B 16 [0.63] 32 [1.26]
Standard insertion length l1 = 80, 140, 180, 230 mm
M24 x 1.5 13.5 [0.53] 32 [1.26]
[3.15, 5.12, 7.09, 9.06 in]
Standard insertion length l1 = 89, 126, 186, 226, 276 mm
[3.50, 4.96, 7.32, 8.9, 10.87 in]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 13 of 23

Design 4, compression fitting sliding on stem Process connec- Dimensions in mm [in]

3073050.07
tion
G i SW Ø d4
⬡ SW
G½B 14 [0.55] 27 [1.06] 26 [1.02]

⌀d4
G
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]

⌀d
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -
1 i l2
F xx 40 l1 Insertion length l1 = variable
[1.575]

 Sealing ring

Design 4.1, compression fitting with support tube sliding Process connec- Dimensions in mm [in]
on stem tion

3073050.07
G i SW Ø d4
25 ⬡ SW G½B 14 [0.55] 27 [1.06] 26 [1.02]
[0.984]
⌀d4

G¾B 16 [0.63] 32 [1.26] 32 [1.26]

G

⌀d M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]

½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -
1 i l2
Insertion length l1 = variable
F DS 40 l1
[1.575]
 Sealing ring

Design 5, union nut and loose threaded connection Process connec- Dimensions in mm [in]
3073050.07

tion
G i SW d4
⬡ SW
G½B 14 [0.55] 27 [1.06] 26 [1.02]
⌀d4
G

G¾B 16 [0.63] 32 [1.26] 32 [1.26]

M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]
⌀d

½ NPT 19 [0.75] 22 [0.87] -

¾ NPT 20 [0.79] 30 [1.18] -
i l2
F xx l1 Insertion length l1 = variable

Design 7, compression fitting on the case Process Dimensions in mm [in]

14042662.04

connection
G i SW d4
⬡ SW 40 l1
[1.575] G½B 14 [0.55] 27 [1.06] 26 [1.02]
⌀d4

[0.079]

[0.26]

G¾B 16 [0.63] 32 [1.26] 32 [1.26]

⌀d
⌀ 6,6
G

2 2
⌀2

M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]

½ NPT 19 [0.75] 22 [0.87] -
i 50 l2
1
[1.969] ¾ NPT 20 [0.79] 30 [1.18] -
F xx l B = 100 (lF) L
[3.937]

 Sealing ring
 Bend protection (not applicable to ∅ d = 6 mm [0.24 in])
Insertion length l1 = ≥ 400 mm [15.75 in]
Probe length L = 200 mm [7.87 in] with ∅ d = 6 mm
170 mm [6.69 in] with ∅ d = 8 mm
100 mm [3.94 in] with ∅ d = ≥ 10 mm
lB = 100 mm [3.94 in], others on request
WIKA data sheet TM 73.01 ∙ 08/2025 Page 14 of 23
Back mount, lower mount and back mount adjustable stem and dial connection designs with contact bulb

Back mount with contact bulb

3107884.06
50
[1.969]

⬡ 27

[0.472]
⌀ 12

⌀D1
22 12 100 53
[0.866] [0.472] [3.937] [2.087]

Nominal ∅ D1 in mm [in]
size
100 101 [3.98]
160 161 [6.34]

Lower mount with contact bulb 50

3107892.01
[1.969]
⌀D1
[2.008]

⬡ 27
51

18,5
[0.728]
[3.937]

⌀ 12
100

[0.472]

120 22
[0.472]

[4.724] [0.866]
12

Nominal ∅ D1 in mm [in]
size
100 101 [3.98]
160 161 [6.34]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 15 of 23

Adjustable stem and dial with contact bulb

3107906.01
45 50
[1.772] [1.969]

⌀D1
[3.583]
91
⬡ 27

[3.937]
⌀ 12

100
[0.472]
[0.472]

120 22
[4.724] [0.866]
12

Nominal ∅ D1 in mm [in]
size
100 101 [3.98]
160 161 [6.34]

Capillary instruments F73 with case mounting options

Model F73, capillary instrument, lower mount with instrument mounting

3073270.02

bracket 50
[1.969]
⌀D1

⌀7
[0.276] 18,5
[0.728]
[2.165]
55
[2.205]
56

⌀ 26
lF

[1.024]

65 100
[2.559] [3.937]

Nominal ∅ D1 in mm [in]
size
100 101 [3.98]
160 161 [6.34]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 16 of 23

Model F73.100, capillary instrument, back mount with panel

3073289.03
mounting flange 50
[1.969]
⌀d3 8
[0.315]

3x 1
20°

⌀D1
lF

1
⌀d1
⌀d2

 Control panel

Nominal ∅ D1 in ∅ d1 in ∅ d2 in ∅ d3 in
size mm [in] mm [in] mm [in] mm [in] 1)
100 101 [3.98] 116 ... 118 132 [5.2] 4.8 [0.19]
[4.57 ... 4.65]
160 161 [6.34] 178 [7.01] 196 [7.72] 5.8 [0.23]

Model F73.100 capillary instrument, lower mount, with surface

14126562.02

mounting flange

⌀ 4,8 ≈4 50
[0.189] [0.157] [1.969]
3x 1
20°

[3.976]
⌀ 101
[0.591]
15

lF

⌀ 116 ... 118 18,5

[4.567 ... 4.646] [0.728]
⌀ 132
[5.197]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 17 of 23

Model F73.160 capillary instrument, lower mount with

3073165.04
surface mounting flange

⌀6 6 50
[0.236] [0.236] [1.969]

3x 1
20°

[6.339]
⌀ 161
[0.591]
15
lF
⌀ 174 ... 178 18,5
[6.85 ... 7.01] [0.728]
⌀ 196
[7.717]

Model F73 capillary instrument, back mount with triangular

3073297.02
profile ring and yoke
30 ≈ 48 ≈5
[1.181] [1.89] [0.197]
⌀D1
⌀D3
e2

lF

e3 e4
1
e1

 Control panel

Nomi- ∅ D1 in ∅ D3 in e1 e2 e3 e4
nal size mm [in] mm [in]
100 101 [3.98] 4.8 [0.19] 110 [4.33] 25 [0.98] 75 [2.95] 59 [2.32]
160 161 [6.34] 5.8 [0.23] 173 [6.81] 25 [0.98] 126 [4.96] 73 [2.87]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 18 of 23

Connection designs for capillary instruments

Design 1, plain stem (without thread)

3073300.14
⌀d
l2

lF l1

Design 2, rotatable connection

3073300.14
⬡ SW
G

⌀d

i l2

lF ≈ 35 l1
[1.378]

Process connection Dimensions in mm [in]

G i SW
G½B 20 [0.787] 27 [1.06]
M8 x 1.5 15 [0.59] 22 [0.87]

Design 3, union nut

3073300.14

⬡ SW
⌀d
G

10 i l2
[0.394]
lF l1

Process connection Dimensions in mm

G i SW
G½B 14 [0.55] 27 [1.06]
G¾B 16 [0.63] 32 [1.26]
M24 x 1.5 13.5 [0.53] 24 [1.26]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 19 of 23

Design 4, compression fitting sliding on stem

307330.14
⬡ SW

⌀d4
G

⌀d
i l2
1
40 l1
[1.575]
lF (L)

 Sealing ring

Process connection Dimensions in mm

G i SW d4
G½B 14 [0.55] 27 [1.06] 26 [1.02]
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -

Design 5, union nut and loose threaded connection 307330.14

⬡ SW
⌀d4
G

⌀d

i l2

lF 40 l1
[1.575]

Process connection Dimensions in mm

G i SW Ø d4
G½B 14 [0.55] 27 [1.06] 26 [1.02]
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
M18 x 1.5 12 [0.47] 24 [0.95] 23 [0.91]
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -

WIKA data sheet TM 73.01 ∙ 08/2025 Page 20 of 23

Design 6.1, compression fitting sliding on capillary (compression fitting is

307330.14
leak-proof)
50 ≈ 25 (l 1 )
[1.969] [0.984]
⬡ SW

⌀d4
G
[0.26]
[0.079]

⌀ 6,6
⌀2

⌀d
i l2
1 2
lF L
 Sealing ring
 Bend protection spring (not applicable to d = 6 mm [0.24 in])

Process connection Dimensions in mm

G i SW Ø d4
G½B 14 [0.55] 27 [1.06] 26 [1.02]
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -

Insertion length l1 = Variable

Probe length L = 200 mm [7.87 in] with ∅ d = 6 mm [0.24 in]
170 mm [6.69 in] with ∅ d = 8 mm [0.32 in]
100 mm [3.94 in] with ∅ d = ≥ 10 mm [0.39 in]

Design 6.2, compression fitting sliding on capillary with spiral protective sleeve
(compression fitting is leak-proof) 307330.14
≈ 25 (l1)
[0.98]
⬡ SW i
[0.354]

⌀d4
[0.276]

⌀9

⌀d
⌀7

↔
max. 45 l2
1 2
[1.77]
lF L

 Sealing ring
 Bend protection spring (not applicable to d = 6 mm [0.24 in])

Process connection Dimensions in mm

G i SW d4
G½B 14 [0.55] 27 [1.06] 26 [1.02]
G¾B 16 [0.60] 32 [1.26] 32 [1.26]
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -

Insertion length l1 = ≥ 300 mm [11.81 in] with ∅ d = 6 mm [0.24 in] or 8 mm [0.32 in]
≥ 200 mm [7.87 in] with ∅ d = ≥ 10 mm [0.39 in]
Probe length L = 200 mm [7.87 in] with ∅ d = 6 mm [0.24 in]
170 mm [6.69 in] with ∅ d = 8 mm [0.32 in]
100 mm [3.94 in] with ∅ d = ≥ 10 mm [0.39 in]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 21 of 23

Design 6.3, compression fitting sliding on spiral protective sleeve
(compression fitting is not leak-proof)

307330.14
≈ 25 (l1)
[0.98]
⬡ SW i

⌀d4
[0.276]

G
⌀7

⌀d
l2
1
lF L

 Ferrule

Process connection Dimensions in mm [in]

G i SW d4
G½B 14 [0.55] 27 [1.06] 26 [1.02]
G¾B 16 [0.63] 32 [1.26] 32 [1.26]
½ NPT 19 [0.75] 22 [0.87] -
¾ NPT 20 [0.79] 30 [1.18] -

Insertion length l1 = Variable

Probe length L = 200 mm [7.87 in] with ∅ d = 6 mm [0.24 in]
170 mm [6.69 in] with ∅ d = 8 mm [0.39 in]
100 mm [3.94 in] with ∅ d = ≥ 10 mm [0.39 in]

Note for designs 6.1, 6.2, 6.3:

With some combinations, the active length l2 can correspond to the probe length L.
If an additional compression fitting is desired, the probe length L increases by at least 60 mm [2.36 in].

Design: contact bulb

307330.14
lF
[0.472]
12

120 22
[4.724] [0.866]

WIKA data sheet TM 73.01 ∙ 08/2025 Page 22 of 23

 Ordering information Standard Configurator
Model / Nominal size / Scale range / Connection design / Process connection / Length I1 / article
Capillary length IF / Options

© 02/2006 WIKA Alexander Wiegand SE & Co. KG, all rights reserved.
The specifications given in this document represent the state of engineering at the time of publishing.
We reserve the right to make modifications to the specifications and materials.
In case of a different interpretation of the translated and the English data sheet, the English wording shall prevail.

WIKA data sheet TM 73.01 ∙ 08/2025 Page 23 of 23

08/2025 EN

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
info@wika.de
www.wika.de