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Reference GKNS120R

KNS 120 temperature sensor series

Type of sensitive element any type

Temperature difference

-40 ° C to 150 ° C (may be limited by the type of sensor, to be determined in the warranty documentation)

Protection class IP 65 according to EN 60529

Connection head material

LEXAN (compliant with standard EN 45545-2)

Rod material stainless steel DIN 1.4301

Shank diameter 6 ± 0,2 mm

Rod length L 70, 120, 180 mm (other according to customer)

Recommended wire cross section 0,35 to 1,5 mm2

Response time τ0,5 <9 s (in running water at 0,4 ms-1)

Isolation resistance

> 200 MΩ at 500 VDC, temperature 25 ° C ± 3 ° C, humidity <80%

Average life ≈ MTTF * 1,2 x 105 h

* Under the environmental and operational conditions specified in the approved test methodology.


Shock and vibration tests

category 1, class B according to EN 61373

Insulation test 4 kVDC for 1 minute according to EN 50155

Fire resistance

according to EN 45545 (possible according to NFPA 130)


The KNS 120 series of temperature sensors are designed for measuring the temperature of liquid or gaseous substances. In the application segment of rail vehicles, sensors are used, for example, to measure the temperature of the outside air under the vehicle floor. For this, the sensors are equipped with a high mechanical resistance rod.

The sensors consist of the plastic head, where the sensing element is placed, and the metal measuring box. All metal parts are made of DIN 1.4301 stainless steel. The input cable is connected to the terminal block via a grommet, which is part of the connection head. The base material of the head is LEXAN. The sensors can be used for all control systems compatible with the types of detection elements listed in the table of technical parameters. The maximum operating temperature range of the sensor is -40 ° C to 150 ° C. The sensor complies with protection IP 67 according to EN 60529.

The sensors are intended to operate in a chemically non-aggressive environment.


Type tests are carried out by a notified body according to EN 50155 Railway applications - Electronic equipment used on rolling stock, Art. 12.2.9, 12.2.11

- Art. 12.2.9 according to EN 50155 - insulation test

- Art. 12.2.11 according to EN 61373 - shock and vibration tests

The material of the plastic connection head meets a set of requirements for materials R 24 according to table 5 for the fire risk level HL1-HL2-HL3 of standard EN 45545-2, as amended. May be supplied with materials that meet NFPA 130 fire safety standard, as amended.

- variable rod design - length L

- Class-leading precision (except for Ni 10000/5000, Ni 10000/6180, T1 = Ni 2226, NTC 20 kΩ)

- possibility of coating non-standard temperature sensors (DALLAS, TSiC, KTY, SMT, TC etc.)

- possibility of enclosing two sensors

- possibility of 3-wire or 4-wire connection

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