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ktr 156/r temperature measurement of axle bearings

The KTR 156/R resistance temperature sensor is designed to measure temperature of solid substances. In the application segment of Railway Vehicles, it is intended to measure temperature of carriage axle bearings. The sensor configuration is depended on achieving the required resistance of the entire structure, in particular against vibrations and shocks.

The temperature range is -40 °C to 120 °C and these limits must not be exceeded even for a brief period. The sensors can be used for any control systems compatible with types of sensing elements listed in the table of technical parameters. The sensor meets ingress protection IP 68 (1 bar) according to EN 60529, as amended.

The sensor is intended for operation in chemically non-aggressive environment.

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Sensor type KTR 156/R
– Type of sensing element all types
– Temperature range -40 °C to 120 °C (the measuring range can be extended – see the modifications)
– Ingress protection IP 68 (1 bar) in accordance with EN 60529

Case dimension 15.9 ± 0.05 mm
– Length of case L 10 to 100 mm
– Case material stainless steel DIN 1.4301

Lead-in cable RADOX shielded 2 × 0.5 mm2
– RADOX shielded 4 × 0.5 mm2
– Wire resistance 0.07 Ω for 1 m of cable for 2-wire connection

Protection tube PA12, NW12/RLTPF12B, could be different

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

Shock and vibration tests category 3 in accordance with EN 61373

Insulation test 4 kVDC for time 1 minute in accordance with EN 50155
Mean working life ≈ MTTF * 1.95 × 106 hrs

The type tests are carried out by a notified body according to EN 50155 standard, as amended Railway applications – Electronic equipment used on rolling stock, Art. 12.2.9, 12.2.11

  • Insulation test in accordance with EN 50155, as amended
  • Shock and Vibration tests in accordance with EN 61373, as amended
  • The product meets parameters in accordance with EN 45545-2, as amended
  • Fire protection on railway vehicles – Part 2: Requirements for fire behavior of materials and components. The materials also meet the requirements of the NFPA 130 fire safety standard, as amended.

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