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TEMPERATURE AND HUMIDITY SENSORS FOR USE IN AIR CONDITIONING DUCTS KSTH122

TEMPERATURE AND HUMIDITY SENSORS FOR USE IN AIR CONDITIONING DUCTS KSTH122

Reference GKSTH122R

Sensor type KSTH 122

Temperature measurement range -40 ° C to 125 ° C

Temperature measurement accuracy ± 0,2 ° C in the range of 0 ° C to 60 ° C

± 1,75 ° C in the range -30 ° C to 80 ° C

Relative humidity measurement range from 0 to 100%

Relative humidity measurement accuracy ± 1,8% RH at + 23 ° C (0 to 90% RH)

± 4% RH in the range of 0 to 100%

RS 485 / MODBUS RTU output signal

Supply voltage U 15 to 30 VDC

Nominal supply voltage Un 24 VDC

Maximum consumption: 500 mW

typical: 250 mW

Protection class of the terminal block

IP 65 according to EN 60529

Protection class of sensors

IP 65 according to EN 60529

Sensor dust filter

Filtration capacity 0,025 mm

Head dimension 70 x 63 x 34 mm

Standard rod length 100 mm

LEXAN head material (conforms to EN 45545-2)

Min weight 50 g

Recommended wire cross section 0,14 to 1 mm2

Tests

Shock and vibration tests

category 1, class B according to EN 61373

Electromagnetic compatibility according to EN 50121-3-2

Insulation test 1,5 kVDC for 1 minute according to EN 50155

Fire resistance

according to EN 45545 (possible according to NFPA 130)

Product features TEMPERATURE AND HUMIDITY SENSORS FOR USE IN AIR CONDITIONING DUCTS KSTH122

The temperature and relative humidity sensor - KSTH 122 is designed to measure the temperature and relative humidity of the air in air conditioning ducts. In the segment of railway vehicle applications, it is used to measure the two variables in air conditioning ducts of train units and wagons and is part of the temperature and relative humidity control system.

The temperature and relative humidity sensor - KSTH 122 consists of a plastic connection head and a measuring rod, where a printed circuit board with the individual sensors and a converter is placed to establish communication via the RS 485 bus. Temperature and relative humidity are measured by a common internal sensor, the signal of which is processed in a microprocessor and converted into an output signal of MODBUS RT. The sensors comply with the degree of protection IP 65 according to EN 60529.

The temperature and relative humidity sensor - KSTH 122 is designed to operate in a chemically non-aggressive environment; the use should be chosen based on the temperature and chemical resistance of the sensor head and individual sensors. The operating conditions to establish the correct function are:

- Ambient temperature near the sensor: -40 to 80 ° C

- Ambient relative humidity: 0 to 100%

- Atmospheric pressure: 87 to 106 kPa

TESTS, DECLARATION, CALIBRATIONS

The type tests are carried out by a notified body according to standard EN 50 155, as modified Railway applications - Electronic equipment used on rolling stock, Art. 12.2.7, 12.2.8, 12.2.9, 12.2.11

- Art. 12.2.7, 12.2.8 according to EN 50121-3-2 - Electromagnetic compatibility

- Art. 12.2.9 according to EN 50155 - insulation test

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

The materials of the plastic box and the PCB meet a set of requirements for R 24 materials according to Table 5 for the fire risk level HL1-HL2-HL3 of the standard EN 45545-2: 2014. The materials also meet the requirements of NFPA 130 fire safety standard, as amended.

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