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Combined probe STHCPV - Modbus RS485

Reference GSTHCPV102R

Delivery in 3 to 5 weeks

Indoor combined temperature, relative humidity, CO sensor 2 , atmospheric pressure and VOC - The STHCPV 102  is designed to measure the concentration of carbon dioxide, air temperature, relative humidity, atmospheric pressure and the concentration of volatile organic compounds (VOCs) in water protected areas.

Product features Combined probe STHCPV - Modbus RS485

Room sensor

By selecting specific sensors, it is possible to choose a variant of the sensor with different combinations of measured quantities (combination of two to five measured quantities). 

Combined temperature, relative humidity, CO sensor 2 , atmospheric pressure and VOC - STHCPV 102  consists of a plastic head with grooves in which a printed circuit with individual sensors and a transmitter are located for communication via RS 485 bus. Temperature, relative humidity, atmosphere, pressure and VOCs are measured by a common internal sensor whose signal is processed in the microprocessor and converted into a MODBUS RTU output signal. The CO value 2 is measured by the NDIR module, the digital signal of which is also converted into a MODBUS RTU output signal. A function of self-calibration is available for the CO concentration sensor 2 , which ensures that the sensor is set to a minimum CO value 2 corresponding to the level of external concentration. The temperature, relative humidity, CO sensor 2 , atmospheric pressure and VOC - STHCPV 102  complies with protection class IP 30 of the modified standard EN 60529. Pleasant design and quality materials ensure that  sensors temperature, relative humidity, CO 2 , atmospheric pressure and VOC - STHCPV 102  do not disturb even in interiors subject to high aesthetic requirements. The sensors de  temperature, relative humidity, CO 2 , recommended atmospheric pressure and VOC are located  at a height of 1,5 m from the interior wall, in the area of ​​movement of people, away from sunny places and affected by the temperature of the walls, heat sources or lighting.

The sensors temperature, relative humidity, CO 2 , atmospheric pressure and VOC - STHCPV 102  are designed to operate in a chemically non-aggressive environment. The method of use should be selected based on the temperature and chemical resistance of the sensor head and the individual sensors. Operating conditions to ensure the proper functioning of the CO sensor 2 are the following:

  • ambient temperature: 0 to 45 ° C
  • relative humidity: 0 to 85% (non-condensing)
  • atmospheric pressure: 87 to 106 kPa  

Sensor type STHCPV 102
Temperature measurement range **

0 to 45 ° C with guaranteed CO measurement accuracy 2 de 
-30 to 70 ° C without guaranteed CO measurement accuracy 2   de 
-40 to 80 ° C

Temperature measurement accuracy * ± 0,5 ° C at 25 ° C 
± 1,0 ° C in the range of 0 to 65 ° C
Relative humidity measurement range * 0 to 85% with CO measurement accuracy 2
guarantee 0 to 95% without CO measurement accuracy 2guarantee
Relative humidity measurement accuracy * ± 3% between 20 and 80%  
± 4,5% between 0 and 19% and 81 to 95%
CO measurement range 2  * 400 to 5000 ppm
CO measurement accuracy 2  * ± 100 ppm
CO reaction time 2  (90%) 90 s
VOC measurement range (IAQ index) *   0 to 500
VOC measurement accuracy * ± 15%
Measuring range of atmospheric pressure * 300 to 1100 hPa
Measurement accuracy of atmospheric pressure * 
(in the temperature range from 0 to 65 ° C, in the range from 300 to 1100 hPa)
absolute deviation: ± 0,6 hPa 
long-term temperature stability: ± 1,0 hPa 
Measurement accuracy of atmospheric pressure * 
(temperature range 25 to 40 ° C, range 700 to 1100 hPa)
absolute deviation: ± 0,12 hPa
Output signal RS485 / MODBUS RTU
Supply voltage 15 to 30 V DC
Nominal supply voltage U n 24 V DC
The consumption max: 500mW 
typical: 300 mW
Degree of protection IP 30 according to EN 60529, as modified
Head dimensions 71,9 x 59 x 27 mm
Head material lexan
The weight min 35g
Recommended conductor cross-section 0,14 to 1 mm 2

Note: The manufacturer reserves the right to modify the design and technical characteristics of the products.

The sensors are designed to be mounted on a wall or other vertical surface. For fixing, it is necessary to prepare the required holes for mounting screws using a template (supplied with the sensor).
Before connecting the power cable, it is necessary to separate the perforated cover from the plastic base. Remove the cover and insert the cable through the 9 mm hole, apply the base to the surface and screw with two screws or bolts. The length of the bolts or fixing screws for fixing should be chosen according to the thickness of the plastic base. Connect the power cable to the terminals in accordance with the “Wiring” section. Diagram: place the perforated cover on the fixed base and lock it by clicking on it. After installation and connection to the electrical measuring device, the sensor is ready for use. The sensor does not require any particular maintenance.