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Interior CO2, temperature, and humidity sensor with RS-485/Modbus communication for ventilation and HVAC control in buildings. More information
Out of stock - can be requested
| IP Rating | IP 30 |
| Measurement range | 0...45 °C |
| Output | Modbus RTU |
| Power Supply | 24 VDC |
| Weight | 0.04 kg |
The Sensit STHC 102 is a combined interior sensor for measuring CO2 concentration, temperature, and relative humidity in water-protected spaces. The measured values are processed by a microprocessor and transmitted via the RS-485 bus using the MODBUS RTU protocol. CO2 is measured with an NDIR module, and the sensor offers an auto-calibration function to set the minimum value to the level of outdoor concentration. With IP30 protection and a discreet design, it is suitable for offices, classrooms, meeting rooms, and other interiors requiring reliable air quality management.
| Power Supply | 15-30 VDC (nominally 24 VDC) |
| Output / Interface | RS-485 / MODBUS RTU |
| CO2 Range | 400-5000 ppm |
| CO2 Accuracy | ± 100 ppm |
| CO2 Response Time (90%) | 90 s |
| Temperature Range | 0...45 °C (with guaranteed CO2 accuracy), –30...70 °C (without CO2 accuracy guarantee) |
| Temperature Accuracy | ± 0.5 °C |
| Relative Humidity Range | 0...95 % |
| Relative Humidity Accuracy | ± 3 % (10...85 %), ± 4.5 % (0...10 %) |
| Protection | IP30 |
| Head Material | LEXAN |
| Dimensions | 71.9 x 59 x 27 mm |
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