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TEMPERATURE, RELATIVE HUMIDITY, PRESSURE AND VOC SENSORS - RS 485 MODBUS

Description and application

TEMPERATURE, RELATIVE HUMIDITY, PRESSURE AND VOC SENSORS - RS 485 MODBUS

Temperature, relative humidity, atmospheric pressure and VOC sensor – KSTHPV 102 is designed to measure carbon dioxide concentrations, air temperature, air relative humidity, atmospheric pressure and concentrations of volatile organic compounds. In the application segment of rail vehicles, it is used to measure all variables in passenger compartments of train units and carriages and is a part of the temperature, relative humidity, atmospheric pressure and air quality control system.

The KSTHPV 102 temperature, relative humidity, atmospheric pressure and VOC sensor consists of a plastic ribbing head containing a printed circuit board with the individual sensors and a converter to establish a communication via the RS 485 bus. Temperature, relative humidity, atmospheric pressure and VOC are measured by a common internal sensing element whose signal is processed in a microprocessor and is converted to a MODBUS RTU output signal. The KSTHPV 102 temperature, relative humidity, atmospheric pressure and VOC sensor meets the ingress protection of IP 30 according to CSN EN 60529. The pleasant design and high-quality material ensure that the KSTHPV 102 temperature, relative humidity, atmospheric pressure and VOC sensor does not seem intrusive even in interiors with high aesthetic requirements. The KSTHPV 102 temperature, relative humidity, atmospheric pressure and VOC sensor is recommended to be installed on an inner wall at a height of 1.5 m, in areas with moving persons, not exposed to direct sunlight and not influenced by heat from walls, heat sources or lighting. The KSTHPV 102 temperature, relative humidity, atmospheric pressure and VOC sensor is designed to be operated in a chemically non-aggressive environment; its use must be chosen with regard to the temperature and chemical resistance of the head and of the individual sensors. Correct sensor function requires the following operating conditions:

  • Ambient temperature around the sensor: -30 °C to 70 °C, for short periods -40 to 80 °C
  • Relative ambient humidity: 0 to 95% (non-condensing humidity)
  • Atmospheric pressure: 87 to 110 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. Can be supplied with materials complying with fire safety standard NFPA 130, 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 KSTHPV 102
Measuring values temperature, relative humidity, atm. pressure, VOC
Temperature measurement range -30 °C to 70 °C
-40 °C to 80 °C short-time
Temperature measurement accuracy ± 0.5 °C in temperature 25 °C
± 1.0 °C in temperature 0 to 65 °C
Relative humidity measurement range 0 to 95 %
Relative humidity measurement accuracy ± 3 % in the range from 20 to 80 %
± 4.5 % in the range from 0 to 19 % and 81 to 95 %
VOC (IAQ index) measurement range* 0 to 500
VOC measurement accuracy* ± 15 %
Atmospheric pressure measurement range * 300 to 1100 hPa
Atmospheric pressure measurement accuracy
(in temperature range 0 to 65 °C,
in range 300 to 1 100 hPa)
absolute deviation ±0.6 hPa
longterm temperature stability: ± 1.0 hPa
Atmospheric pressure measurement accuracy
(in temperature range 25 to 45 °C,
in range 700 to 1 100 hPa)
absolute deviation ±0.12 hPa
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 in accordance with EN 60529
Dimension of the head 71.9 x 59 x 27 mm
Material of the head LEXAN (meets standard EN 45545-2)
Recommended wire cross section 0.14 to 1 mm2
Weight min 35 g

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

Tests
Shock and vibration tests category 1, class B in accordance with EN 61373
Elektromagnetic compatibility in accordance with EN 50121-3-2
Insulation test 1.5 kVDC for time 1 minute in accordance with EN 50155
Fire protection resistance
in accordance with EN 45545 (possible acc. to NFPA 130)

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 KSTHPV 102
 Datasheet - TEMPERATURE SENSOR KSTHPV 102 Datasheet - TEMPERATURE SENSOR KSTHPV 102
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