Combined Temperature, Relative Humidity and CO2 Sensors

Produkt von SENSIT s.r.o.

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  • InnoTrans 2018
  • Halle 6.2 105
  • Railway Technology Railway Technology

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Produktbeschreibung

Combined Temperature, Relative Humidity and CO2 Sensor KSTHC 102 / KSTHC 104 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.
This Combined Temperature, Relative Humidity and CO2 Sensors KSTHC 102 / KSTHC 104 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 or CAN protocole. 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 or CANopen. The CO2 value is measured by a NDIR module whose digital signal is also converted to an output signal of CANopen. 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. This Combined Temperature, Relative Humidity and CO2 sensor meets the ingress protection of IP 30 according to EN 60 529. Suitable design and high-quality material ensure that the sensor does not feel disturbing even in the interiors with high aesthetic requirements.
Combined 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

These combined sensors are used to measure two or all of the three variables in passenger compartments of train units and carriages and are a part of the temperature, relative humidity and CO2 concentration control system.
With the use of the Combibned Temperature, Relative Humidity and CO2 Sensors, we secure e.g.:
  • creation and preservation of comfortable climate for passengers in railwayveicles
  • removal of mists of windows and wall of train units
  • energy savings based on the CO2 value evaluation by the air conditioning unit
  • increase in efficiency of the whole control system
  • costs savings
The sensors meet requirements of railway standards and type tests are carried out by the notified body:
  • Insulation test in accordance with EN 50155
  • Shock and vibration test in accordance with EN 61373
  • Electromagnetic compatibility in accordance with EN 50121-3-2
  • the plastic box and PCB materials meet a set of requirements for the R 24 materials according to the table 5 for the fire hazard level HL1-HL2-HL3 of EN 45545-2:2014
  • NFPA 130

    The design of Combined Temperature, Relative Humidity and CO2 Sensors serures:
  • temperature, relative humidity and CO2 measurement in small aesthetic design
  • better air flow around the temperature and humidity sensing element
  • significantly faster time response of temperature and relative humidity
  • convenient installation and demoval of the sensor