Mechanical
temperature measurement
Bimetal thermometer
Model 53, industrial series
WIKA data sheet TM 53.01
for further approvals
see page 6
Applications
■■ Chemical industry, petrochemical industry, process
technology and food industry
■■ Facility management
■■ For aggressive medium
Special features
■■ Universal application
■■ Case and stem from stainless steel
■■ Bimetal with zero point setting at the back of the case
■■ Nominal size 3" and 5"
■■ Embossed dial (no parallax reading errors)
Bimetal thermometer
Fig. left: back mount (axial), model A5301
Fig. right: adjustable stem and dial version,
Description model S5301
This series of thermometers is designed for installation in
pipes, vessels, plant and machinery.
Sheath and case are made of stainless steel. To allow fitting
to the process, different installation lengths and process
connections are available. Through the high protection class
of the thermometer (IP65) and its liquid damping, operation
under high vibration conditions is possible.
The imperial nominal sizes are commonly used in North
American and related markets.
WIKA data sheet TM 53.01 ∙ 07/2017 Page 1 of 6
Standard version
Measuring element Permissible ambient temperature at case
Bimetal coil -20 ... +60 °C max. (others on request)
Nominal size Temperature limits for storage and transport
3", 5" -20 ... +60 °C (EN 13190)
Connection design Ingress protection
S Standard (male thread connection) 1) IP65 per IEC/EN 60529
1 Plain stem (without thread)
2 Male nut
3 Union nut (female) Options
4 Compression fitting (sliding on stem)
5 Union nut with fitting
■■ Scale range °F, °C/°F (dual scale)
1) Not for version “adjustable stem and dial”
■■ Liquid damping up to max. 250 °C (at the sensor)
■■ Laminated safety glass, acrylic plastic
Models
■■ Stem diameter 6, 10 mm
Model NS Version ■■ Ingress protection IP66
A5300 3" Back mount (axial) ■■ Special measuring ranges or dial printing to customer
specifications (on request)
A5301 5"
■■ Version per ATEX
S5300 3" Back mount, adjustable stem and dial
S5301 5"
Accuracy class
EN 13190
Working range
Normal (1 year): Measuring range (EN 13190)
Short time (24 h max.): Scale range (EN 13190)
Case, bezel ring
Stainless steel 1.4301 (304)
Stem, process connection
Stainless steel 1.4571 (316Ti)
Dial
Aluminium white, black lettering
Window
Instrument glass
Pointer
Aluminium, black, adjustable pointer
Zero adjustment
on the rear of the case, external
Insertion length L1
63 ... 1,000 mm
minimum/maximum length depends on the measuring range
and diameter
Permissible pressure rating of stem
max. 25 bar, static
Page 2 of 6 WIKA data sheet TM 53.01 ∙ 07/2017
Scale and measuring ranges 1) (EN 13190)
Scale graduation per WIKA standard
Scale range Measuring range 1) Scale spacing Scale range Measuring range 1) Scale spacing
in °C in °C in °C in °F in °F in °F
-70 ... +70 -50 ... +50 2 -80 ... +120 -40 ... +100 2
-70 ... +30 -60 ... +20 1 -80 ... +240 -50 ... +210 2
-50 ... +50 -40 ... +40 1 -20 ... +120 0 ... 100 2
-50 ... +100 -30 ... +80 2 0 ... 200 20 ... 180 2
-50 ... +300 0 ... 250 5 0 ... 250 30 ... 220 2
-50 ... +500 0 ... 450 5 30 ... 300 60 ... 270 5
-30 ... +50 -20 ... +40 1 30 ... 400 80 ... 350 5
-20 ... +60 -10 ... +50 1 50 ... 300 80 ... 270 5
-20 ... +100 0 ... 80 2 50 ... 400 100 ... 350 5
-20 ... +120 0 ... 100 2 100 ... 800 200 ... 700 5
0 ... 60 10 ... 50 1 200 ... 700 250 ... 650 5
0 ... 80 10 ... 70 1 200 ... 1.000 300 ... 900 5
0 ... 100 10 ... 90 1
1) The measuring range is indicated on the dial by two triangular marks.
0 ... 120 10 ... 110 2 Only within this range is the stated error limit valid per EN 13190.
0 ... 150 20 ... 130 2
0 ... 160 20 ... 140 2
0 ... 200 20 ... 180 2
0 ... 250 30 ... 220 2
0 ... 300 30 ... 270 5
0 ... 400 50 ... 350 5
0 ... 500 50 ... 450 5
Connection design
Design standard (male thread connection) 2)
Connection, male: ¼ NPT, ½ NPT, G ¼ B, G ½ B
3073050.05
Insertion length l1 = 2.5“, 4“, 6“, 9“, 12“, 15“, 18“, 24“
l1 = 63, 100, 150, 225, 305, 380, 455, 610 mm
Nominal size Process connection Dimensions in mm
NS G i SW d4 Ød
3", 5" ¼ NPT 15 17 – 8
Legend:
½ NPT 19 22 – 8 SW Flats
G Male thread
G¼B 12 22 18 8 i Thread length Ød Stem diameter
G½B 14 27 26 8 Ø d4 Diameter of the sealing collar l2 Active length
2) Not for version “adjustable stem and dial”
Design 1, plain stem (without thread)
Insertion length I1 = 140, 200, 240, 290 mm
3073050.05
Nominal size Dimensions in mm
NS d1 Ød a for a for
axial adjustable stem and dial
3", 5" 18 8 15 25
Legend:
a Distance to case/ Ød Stem diameter
articulated joint l2 Active length
Ø d1 Plain diameter
WIKA data sheet TM 53.01 ∙ 07/2017 Page 3 of 6
Design 2, male nut
Insertion length l1 = 80, 140, 180, 230 mm
3073050.05
Nominal size Process connection Dimensions in mm
NS G i SW Ød
3", 5" G½B 20 27 8
M18 x 1,5 12 24 8
Legend:
G Male thread Ø d Stem diameter
i Thread length incl. collar l2 Active length
SW Flats
Design 3, union nut
Insertion length l1 = 89, 126, 186, 226, 276 mm
3073050.05
Nominal size Process connection Dimensions in mm
NS G1 i SW Ød
3", 5" G½B 8,5 27 8
G¾B 108.5 32 8
M24 x 1.5 13.5 32 8 Legend:
G1 Female thread Ø d Stem diameter
i Thread length l2 Active length
SW Flats
Design 4, compression fitting (sliding on stem)
Standard insertion length l1 = 63, 100, 160, 200, 250 mm
3073050.05
Length L = l1 + 40 mm
Nominal size Process connection Dimensions in mm
NS G i SW d4 Ød
3", 5" G½B 14 27 26 8
Sealing ring
G¾B 16 32 32 8
M18 x 1.5 12 24 23 8
Legend:
½ NPT 19 22 - 8 G Male thread SW Flats
¾ NPT 20 30 - 8 i Thread length Ø d Stem diameter
Ø d4 Diameter of the sealing collar l2 Active length
Design 5, union nut with loose fitting
Standard insertion length l1 = 63, 100, 160, 200, 250 mm
3073050.05
Nominal size Process connection Dimensions in mm
NS G i SW d4 Ød
3", 5" G½B 14 27 26 8
G¾B 16 32 32 8
M18 x 1.5 12 24 23 8
Legend:
½ NPT 19 22 - 8 SW Flats
G Male thread
¾ NPT 20 30 - 8 i Thread length Ø d Stem diameter
Ø d4 Diameter of the sealing collar l2 Active length
Page 4 of 6 WIKA data sheet TM 53.01 ∙ 07/2017
Dimensions in mm
Back mount (axial) Back mount, adjustable stem and dial
Model A53 Model S53
3092534.01
3092526.01
Nominal size Dimensions in mm Weight in kg
NS ØD Ød b b2 F b1 1) Model A53xx Model S53xx
G¼B ¼ NPT G½B ½ NPT
3" 76 6 20 63 55 32 28 35 35 0.30 0.40
5" 127 6 20 63 55 32 28 35 35 0.40 0.50
1) With scale ranges ≥ 0 ... 300 °C the dimensions increase by 40 mm
Thermowell
In principle, the operation of a mechanical thermometer
without a thermowell with low process-side loading (low
pressure, low viscosity and low flow velocities) is possible.
However, in order to enable exchanging the thermometer
during operation (e.g. instrument 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 from the extensive WIKA thermowell portfolio.
For further information on the calculation for the thermowell,
see Technical information IN 00.15.
WIKA data sheet TM 53.01 ∙ 07/2017 Page 5 of 6
Approvals
Logo Description Country
EU declaration of conformity European Union
ATEX directive (option)
Hazardous areas
EAC (option) Eurasian Economic Community
■■ Import certificate
■■ Permission for commissioning
■■ Hazardous areas
GOST (option) Russia
Metrology, measurement technology
KazInMetr (option) Kazakhstan
Metrology, measurement technology
- MTSCHS (option) Kazakhstan
Permission for commissioning
BelGIM (option) Belarus
Metrology, measurement technology
UkrSEPRO (option) Ukraine
Metrology, measurement technology
Uzstandard (option) Uzbekistan
Metrology, measurement technology
- CRN (option) Canada
Safety (e.g. electr. safety, overpressure, ...)
Certificates (options)
■■ 2.2 Test report
■■ 3.1 inspection certificate
■■ DKD/DAkkS calibration certificate
Approvals and certificates, see website
Ordering information
Model / Nominal size / Scale range / Connection size / Connection location / Options
© 04/2008 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.
Page 6 of 6 WIKA data sheet TM 53.01 ∙ 07/2017
07/2017 EN
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
