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TEMPERATURE, RELATIVE HUMIDITY AND CO2 SENSOR
TO THE INTERIOR WITH RS 485 OUTPUT (MODBUS)

Description and application

TEMPERATURE, RELATIVE HUMIDITY AND CO2 SENSOR
TO THE INTERIOR WITH RS 485 OUTPUT (MODBUS)

The KSTHC 102 temperature, relative humidity and CO2 sensor is designed to measure the carbon dioxide concentration, temperature and relative humidity of the air in spaces protected against water. In the application segment of railway vehicles, it is used to measure all of the three variables in passenger compartments of train units and carriages and is a part of the temperature, relative humidity and CO2 concentration control system.

The KSTHC 102 temperature, relative humidity and CO2 sensor consists of a plastic ribbing head where a printed circuit board with the individual sensors and a converter is placed to establish a communication via the RS 485 bus. The temperature and relative humidity are measured by a common internal sensor whose signal is processed in a microprocessor and is converted to an output signal of MODBUS RTU. The CO2 value is measured by a NDIR module whose digital signal is also converted to an output signal of MODBUS RTU. For the CO2 concentration sensor, there is an autocalibration function available to set the sensor at the minimum CO2 value corresponding to the outside concentration level. The KSTHC 102 temperature, relative humidity and CO2 sensor meets the ingress protection of IP 30 according to CSN EN 60 529 v platném znění. Suitable design and high-quality material ensure that the sensor does not feel disturbing even in the interiors with high aesthetic requirements.

The KSTHC 102 temperature, relative humidity and CO2 sensor is designed to be operated in a chemically non-aggressive environment; its use must be chosen with regard to temperature and chemical resistance of the head and of the individual sensors. The operating conditions to establish the correct function of modul CO2 are:

- Ambient temperature in the vicinity of the sensor: 0 to 45 °C

- Relative ambient humidity: 0 to 95% (non-condensing humidity)

- Atmospheric pressure: 87 to 106 kPa

TESTS, DECLARATION, CALIBRATIONS

  • 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

- Electromagnetic Compatibility in accordance with EN 50121-3-2, as amended

- 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 requirements of the NFPA 130 fire safety standard, as amended.

  • Manufacturer provides EU Declaration of Conformity.
  • Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard, as amended) or in an Accredited laboratory.

 


  • Specifications
  • Wiring diagram
  • Dimensional draft
  • Download
Sensor type KSTHC 102
Temperature measurement range * 0 to 45 °C with guaranteed accuracy of CO2 measurement
-40 to 80 °C without guaranteed accuracy of CO2 measurement
-40 to 80 °C short-term
Temperature measurement accuracy * ± 0,5 °C
Relative humidity measurement range * 0 to 85 % with guaranteed accuracy of CO2 measurement
0 to 95 % without guaranteed accuracy of CO2 measurement
Relative humidity measurement accuracy * ± 3 % in range 10 to 85 %
± 4.5 % in range 0 až 10 %
CO2 measuring range * 400 to 5000 ppm
CO2 measuring accuracy * ± 100 ppm *
Time response CO2 (90%) 90 s
Output signal RS 485 / MODBUS RTU
Supply voltage U 15 to 30 VDC
Rated supply voltage Un 24 VDC
Consumption maximum: 500 mW
typical: 250 mW
Ingress protection
IP 30 acc. to EN 60529
Dimension of the head 71.9 x 59 x 27 mm
Material of the head LEXAN (meets standard EN 45545-2)
Weight min 35 g
Recommended wire cross section 0.14 to 1 mm2
Elektromagnetic compatibility in accordance wirh EN 50121-3-2
Insulation test 1,5 kVDC for time 1 minute in accordance with EN 50155
Shock and vibration tests category 1, class B in accordance with EN 61373

* The stated measurement ranges and accuracies for the individual sensors refer to operating conditions when the supply voltage is connected.

Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

Datasheet - TEMPERATURE SENSOR KSTHC 102
 Datasheet - TEMPERATURE SENSOR KSTHC 102 Datasheet - TEMPERATURE SENSOR KSTHC 102
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