The STHC 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.
The STHC 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 STHC 102 temperature, relative humidity and CO2 sensor meets the ingress protection of IP 30 according to EN 60529, as amended. Suitable design and high-quality material ensure that the sensor does not feel disturbing even in the interiors with high aesthetic requirements. You can choose the color of the box white or gray.
The STHC 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 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
- 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.
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| Sensor type | STHC 102 |
| Temperature measurement range ** | 0 to 45 °C with guaranteed accuracy of CO2 measurement - 30 to 70 °C without guaranteed accuracy of CO2 measurement |
| 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: 300 mW |
| Ingress protection | IP 30 acc. to EN 60529, as amended |
| Dimension of the head | 71.9 x 59 x 27 mm |
| Material of the head | LEXAN |
| Weight | min 35 g |
| Recommended wire cross section | 0.14 to 1 mm2 |
* The stated measurement ranges and accuracies for the individual sensors refer to operating conditions when the supply voltage is connected.
**Temperature sensor can be used in temperature range -40 °C to 80 °C for a short time.
Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.