Electrical
temperature measurement
Cable resistance thermometer
Model TR40
WIKA data sheet TE 60.40
for further approvals
see page 11
Applications
■■ For direct installation into the process
■■ Machine building
■■ Motors
■■ Bearing
■■ Pipelines and vessels
Special features
■■ Application ranges from -200 ... +600 °C
■■ For insertion, screw-in with optional process connection
■■ Cable from PVC, silicone, PTFE or glass fibre
■■ Explosion-protected versions Ex i and Ex n
Cable resistance thermometer, model TR40
Description
Cable resistance thermometers are particularly suited to In the standard version the cable sensors are manufactured
those applications in which the metallic sensor tip is mounted without process connections. Fastening elements such as
directly into bored holes (e.g. in machine components) threaded fittings, union nuts, etc. can also be used.
or directly into the process for any application with no
chemically aggressive media or abrasion.
For mounting into a thermowell, a spring-loaded compression
fitting should be provided, since only this can press the
sensor tip into the bottom of the thermowell. Otherwise a
potentially critical force could be exerted on the measuring
tip.
WIKA data sheet TE 60.40 ∙ 01/2015 Page 1 of 11
Sensor Metal sensor
The sensor is located in the tip of the probe. Material: stainless steel
Diameter: 2 mm, 3 mm, 6 mm or 8 mm
Sensor connection method Length: selectable
■■ 2-wire The lead resistance is recorded as an error in the Regardless of the design, the first 60 mm of the sensor tip
measurement. must not be bent.
■■ 3-wire With a cable length of approx. 30 m or longer,
measuring errors can occur. For temperature measurement in a solid body, the diameter
■■ 4-wire The internal lead resistance of the connecting of the bore into which the sensor should be inserted, should
wires is negligible. be no more than 1 mm larger than the sensor diameter.
Sensor tolerance value per DIN EN 60751
■■ Class B
Cable resistance thermometers can be designed in two
■■ Class A
different ways:
■■ Class AA
■■ Tubular design
The combinations of a 2-wire connection with class A or The tubular design features a rigid construction to the metal
class AA are not permissible, since the lead resistance of the sensor tip; therefore tubular designs must not be bent.
measuring insert negates the higher sensor accuracy. Internally, the measuring resistor is connected directly to an
insulated lead, therefore tubular-design cable resistance
For detailed specifications for Pt100 sensors, see Technical thermometers can only be used up to the temperatures
information IN 00.17 at www.wika.com. specified for the lead (see operating temperatures).
■■ Sheathed design
In sheathed resistance thermometers the flexible part of the
Sensor tip designs sensor is a mineral-insulated cable (MI cable).
It consists of a stainless steel outer sheath, which contains
Standard version the insulated internal leads, embedded within a high-density
In the standard version a sensor is fitted which is appropriate ceramic compound.
for the selected measuring range.
This sensor can be operated with acceleration loads of up to The measuring resistor is connected directly to the internal
30 m/s². leads of the sheathed cable and is, therefore, also suitable
(test in accordance with DIN EN 60751) for use at higher temperatures.
Due to their flexibility and the small possible diameters,
Peak response (thin-film sensor) sheathed resistance thermometers can also be used in
A special measuring resistor is connected directly to the locations that are not easily accessible, since, with the
sensor tip. Due to direct contact to the tip this version cannot exception of the sensor tip and the transition sleeve of the
be used as an intrinsically safe thermometer. connection cable, the sheath can be bent to a radius of three
times the diameter of the cable.
Vibration resistant sensor tip (max. 10 g)
Please note:
Special resistors are used for this extremely robust version.
The flexibility of the sheathed resistance thermometer must
In addition special internal design is chosen which durably
be considered, especially when the flow rates are relatively
resists these high loads (100 m/s²).
high.
(test based on DIN EN 60751)
Page 2 of 11 WIKA data sheet TE 60.40 ∙ 01/2015
Transition Maximum working temperatures
The junction between the metal part of the sensor and the The maximum temperatures for this thermometer are limited
connecting cable or bare wire should not be immersed within by different parameters:
the process and must not be bent. Compression fittings
should not be attached to the transition sleeve. ■■ Sensor
The temperature range is limited by the sensor itself.
The dimension T describes the length of the transition sleeve.
Depending on the accuracy class and operating conditions
Criterion Dimension T 1) Ø transition
the optimum can be chosen.
in mm sleeve in mm
Probe Ø = transition sleeve Ø n/a Identical to probe Outside of the defined measuring range the measurement is
Ø 2 ... 4.5 mm 45 6 no longer accurate and the sensor can be damaged.
with crimped transition sleeve
Ø 6 mm 45 7 Possible measuring ranges:
with crimped transition sleeve -50 ... +250 °C
Ø 6 mm 45 8 -50 ... +450 °C
with crimped transition sleeve 2) -200 ... +250 °C
Ø 8 mm 45 10 -50 ... +400 °C (only class A)
with crimped transition sleeve -200 ... +450 °C
1) The transition sleeve is generally 60 mm long for 2 x 4-wire sensor connection method. -200 ... +600 °C (from 450 °C class B)
2) With a large number of wires (e.g. 2 x 3-wire and shielding)
-200 ... +400 °C
-50 ... +600 °C (only class B)
Connecting cable
There are various insulating materials available to suit any ■■ Connection cable and single wires
particular environmental conditions. At any point on the connection cable, the maximum
The cable ends can be prepared ready for connection, or as temperature that may be attained is that for which the
an option, can be fitted with connectors. connection cable is specified. The sensor (see above) itself
can potentially withstand higher temperatures.
Connection cable (standard)
For the common connection wires the following temperature
■■ Wire material: Copper (wire)
limits apply:
■■ Wire cross-section: Approx. 0.22 mm² (standard version)
PVC -20 … +100 °C
■■ Number of wires: Dependent on the connection method
Silicone -50 … +200 °C
■■ Insulation material: PVC, silicone, PTFE or glass fibre
PTFE -50 … +250 °C
■■ Screen (option):
Fibreglass -50 … +400 °C
Recommendation for connection to transmitter
Since, in the tubular design variant, an isolated lead is also
fitted within the metal probe, the operating limits of the
connecting cable apply.
■■ Transition
The temperature at the transition is further limited by the use
of a potted sealing compound.
Maximum temperature of the potting compound: 150 °C
Option: 250 °C
(other variants on request)
■■ Connector
With the option of a coupler connector fitted the maximum
permissible temperature at the plug is 85 °C.
■■ Working temperature
If the temperature to be measured is higher than the
permissible temperature at the cable, connector or transition,
the metal part of the sensor must be long enough to be
outside of the hot zone. It should be noted that the lowest of
the maximum working temperatures for the cable, transition
or connector must not be exceeded.
WIKA data sheet TE 60.40 ∙ 01/2015 Page 3 of 11
Ingress protection
■■ IP protection
Cable resistance thermometers can be delivered with up to
IP 65 (dependent on cable sheath material and number of
wires).
With a special design, IP 67 is also possible on request.
Connection leads with a glass-fibre sheath cannot be
combined with an explosion-proof design.
■■ Explosion protection (option)
TR40 series cable resistance thermometers are available
with an EC-type examination certificate for “intrinsically safe”,
Ex i, ignition protection.
These instruments comply with the requirements of 94/9/EC
(ATEX) directive for gases and dusts.
The classification/suitability of the instrument (permissible
power Pmax as well as the permissible ambient temperature)
for the respective category can be seen on the EC-type
examination certificate and in the operating instructions.
The internal inductance (Li) and capacitance (Ci) for cable
probes are found on the product label and they should be
taken into account when connecting to an intrinsically safe
power supply.
Designs
Cable resistance thermometers are classified into the The dimension A describes the insertion length into the
following variants, depending on the nature of their electrical process. The dimension W describes the length of the
connections: connecting wire. L is the length of the free single wires. The
■■ With single wires dimension T describes the transition sleeve (if present). T is
■■ With connection cable always a constituent of the length W or L (see table on page 3).
■■ With connector
■■ Bare ends
Connection with single wires
Stain relief optional
3162362.02
Cable length 150 mm, other lengths on request
Cu strands 0.22 mm², PTFE or glass-fibre insulated, number
of leads dependent on the number of sensors and the sensor
connection method, bare wire ends, other designs on request
With connection cable
Stain relief optional
Cable and sensor are permanently connected to each other.
3162371.02
Cable length and insulation materials to customer
specification.
Cu strands 0.22 mm², number of leads dependent on the
number of sensors and the sensor connection method, bare
wire ends
Page 4 of 11 WIKA data sheet TE 60.40 ∙ 01/2015
With connector fitted to connection cable
Stain relief optional
The optional connection plug is fitted to a flexible connection
3160700.02
cable.
Designs with bare connecting wires
11354837.01
The internal leads of the mineral-insulated wire protrude.
L = 20 mm (standard)
The length of the bare connection wires can be matched to
customer requirements. These bare internal leads are made
from solid wire, and so are not suitable to be run over long
distances.
Design with connector fitted directly to the probe
These designs are based on the design with bare connection
3162389.02
wires. The connector is fitted directly to the metal probe.
Process connections for straight probes
The cable resistance thermometers can be fitted with an Please note:
optional process connection. The dimension A describes the - For parallel threads (e.g. G ½) the dimensioning always
insertion length into the process. refers to the sealing collar of the threaded connector nearest
the process.
To minimise heat dissipation errors via the threaded - For tapered threads (e.g. NPT) the measurement plane is
connection, the insertion length, A, should be at least 25 mm located approx. in the centre of the thread
long. The position of the threaded connection is specified by
the dimension X and is not dependent on the connection type.
Fixed threaded connections/threads
11355647.01
used to mount the probe into a threaded coupling with a
female thread.
Insertion length A: in accordance with customer specification
Material: stainless steel, others on request
The sensor must be rotated in order to screw it into the
process. Therefore, this design must first be mounted
mechanically and it can then be electrically connected. Thread Thread(NPT)
WIKA data sheet TE 60.40 ∙ 01/2015 Page 5 of 11
Compression fitting
allows simple adjustment to the required insertion length at
11355663.01
the installation point.
Since the compression fitting is adjustable on the probe, the
dimensions A and X are stated as the values for the delivered
item. The length of the compression fitting determines the
smallest possible length, X, of approx. 40 mm.
Material: stainless steel Thread Thread(NPT)
Ferrule material: stainless steel or PTFE
Stainless steel ferrules can be adjusted once; once they
have been unscrewed, sliding along the sheath is no longer
possible.
■■ Max. temperature at process connection 500 °C
■■ Max. pressure load 40 bar
PTFE ferrules can be adjusted several times, after unscrewing,
repeated sliding along the sheath is still possible.
■■ Max. temperature at process connection 150 °C
■■ For use without pressure
For sheathed resistance thermometers with a Ø of 2 mm,
only PTFE ferrules are permitted.
Spring-loaded compression fitting
allows easy adjustment to the desired insertion length at the
11355680.01
mounting point, while at the same time maintaining the spring
pre-tension.
Since the compression fitting is adjustable on the probe, the
dimensions A and X are stated as the values for the delivered
item. The length of the compression fitting determines the
smallest possible length, X, of approx. 80 mm.
Material: stainless steel
Thread(NPT)
Ferrule material: stainless steel Thread
Stainless steel ferrules can be adjusted once; once they
have been unscrewed, sliding along the sheath is no longer
possible.
■■ Max. temperature at process connection 500 °C
A pressure load on the spring-loaded compression fitting is
not intended.
Page 6 of 11 WIKA data sheet TE 60.40 ∙ 01/2015
Spring-loaded compression fitting, can work with
pressures up to max. 8 bar
14121452.01
allows easy adjustment to the desired insertion length at the
mounting point, while at the same time maintaining the spring
pre-tension, intended for use with hydraulic oil
Since the compression fitting is adjustable on the probe, the
dimensions A and X are stated as the values for the delivered
item. The length of the compression fitting determines the
smallest possible length, X, of approx. 80 mm.
Material: stainless steel
Ferrule material: stainless steel
Stainless steel ferrules can be adjusted once; once they
have been unscrewed, sliding along the sheath is no longer
possible.
■■ Permissible temperature at process connection
-30 ... +100 °C
A pressure load on the spring-loaded compression fitting is
permissible up to a max. 8 bar.
Union nut
used to mount the probe into a threaded coupling with a male
11355701.01
thread.
The probe and threads rotate against each other, so the
order in which the mechanical and electrical installation is
made is not important.
This option is not advisable for NPT threads.
Thread
Insertion length A: in accordance with customer specification
Material: stainless steel, others on request
Male nut
used to mount the probe into a threaded coupling with a
11355710.01
female thread.
The probe and threads rotate against each other, so the
order in which the mechanical and electrical installation is
made is not important.
This option is not advisable for NPT threads.
Thread
Insertion length A: in accordance with customer specification
Material: stainless steel, others on request
WIKA data sheet TE 60.40 ∙ 01/2015 Page 7 of 11
Angled probes
Cable resistance thermometers made from sheathed cable If a threaded connection is used on the bent probe, then the
can be delivered in a pre-formed shape. In this case, the dimension Y describes the distance from the centre of the
position of the bend is defined by a further dimension. bend to the measurement plane of the threaded connection.
The dimension X describes the distance of the bend from the Using a fixed threaded connection is not recommended, as
lower edge of the transition sleeve. the bent sensor would need to be screwed into the process
with a wide sweeping movement.
The dimension A is always the insertion length of the sensor,
and thus the area which is built in to the process.
Thread 11356554.01
Thread
11356546.01
d
ad
a
re
re
Th
Th
Page 8 of 11 WIKA data sheet TE 60.40 ∙ 01/2015
Plug (option)
Cable resistance thermometers can be supplied with plugs fitted.
The following options are available:
■■ Spade lugs
(not suitable for versions with bare connecting wires) ■■ Screw-in-plug, Binder (male)
11355728.01
■■ Lemosa connector size 1 S (male)
■■ Lemosa connector size 2 S (male) ■■ Screw-in-plug, Binder (female)
■■ Lemosa free socket size 1 S (female)
■■ Lemosa free socket size 2 S (female)
Further options
Stain relief Transition sleeve with the same diameter as the probe
A stain relief (spring or shrink hose) is used to protect Optionally, a transition sleeve can also be selected that
the transition point from rigid probe to flexible connecting has the same diameter as the metal probe. This makes it
cable. This should always be used when a relative possible to slide on cable glands or compression fittings from
movement between the cable and the installation site of the both ends of the sensor. The transition is hardly visible. The
thermometer is expected. operating limits of the transition do not change, however, i.e.
they must still remain outside the process and should not be
For designs to Ex n the use of a stain relief is obligatory. loaded with a compression fitting.
The standard length of the stain relief spring is 60 mm.
WIKA data sheet TE 60.40 ∙ 01/2015 Page 9 of 11
Electrical connection
Without connector
red red
3160629.06
3160629.06
1 x Pt100
2-wire
white white
2 x Pt100
2-wire
black
red yellow
red
1 x Pt100
3-wire
white
red
red
white
2 x Pt100
red 3-wire black
red black
1 x Pt100
4-wire
white yellow
white
Lemosa connector Screw-in-plug, (Amphenol, Binder)
Connector (male) Socket (female) Connector (male) Socket (female)
View of the plug View of the socket
Front view Front view
contacts contacts
3366036.02
Binder
3366142.05
Series 680
Binder
Series 680
Binder
Series 680
Binder
Series 680
Binder
Series 692
Amphenol
C16-3
Page 10 of 11 WIKA data sheet TE 60.40 ∙ 01/2015
CE conformity
ATEX directive (option)
94/9/EC
Approvals (options)
■■ IECEx, ignition protection type “i” - intrinsic safety,
ignition protection type “iD” - dust protection through
intrinsic safety, international certification for the Ex area
■■ NEPSI, ignition protection type “i” - intrinsic safety,
ignition protection type “iD” - dust protection through
intrinsic safety, ignition protection type “n”, China
■■ EAC, import certificate, ignition protection type “i” -
intrinsic safety, ignition protection type “iD” - dust
protection through intrinsic safety, ignition protection
type “n”, customs union Russia/Belarus/Kazakhstan
■■ GOST, metrology/measurement technology, Russia
■■ INMETRO, Institute of Metrology, ignition protection
type “i” - intrinsic safety, ignition protection type “iD” - dust
protection through intrinsic safety, Brazil
■■ KOSHA, ignition protection type “i” - intrinsic safety,
ignition protection type “iD” - dust protection through
intrinsic safety, South Korea
■■ PESO (CCOE), ignition protection type “i” - intrinsic safety,
ignition protection type “iD” - dust protection through
intrinsic safety, India
Certificates
■■ 2.2 test report
■■ 3.1 inspection certificate
■■ DKD/DAkkS calibration certificate
Approvals and certificates, see website
Ordering information
Model / Explosion protection / Sensor version / Threaded connection version / Thread size / Materials / Sensor diameter /
Measuring element / Connection method / Temperature range / Connection cable, jacket / Lead ends version / Certificates /
Options
© 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.
WIKA data sheet TE 60.40 ∙ 01/2015 Page 11 of 11
01/2015 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
