TEMPERATURE AND HUMIDITY SENSORS FOR USE IN AIR CONDITIONING DUCTS KSTH122
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.