| Sensor type | STHC 104 |
| Temperature measurement range ** | 0 to 45 °C |
| Temperature measurement accuracy * | ± 0.5 °C |
| Relative humidity measurement range * | 0 to 85 % |
| 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 | CAN / CANopen – CiA DS 301 |
| Galvanicaly separated | no, possible on request |
| 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 |
STHC 104 – TEMPERATURE, RELATIVE HUMIDITY AND CO2 SENSOR TO THE INTERIOR WITH CAN
The STHC 104 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 104 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 CAN bus. The temperature and relative humidity are measured by a common internal sensor whose signal is processed in a microprocessor and is converted to a CANopen output signal with CiA DS 301 specification. The CO2 value is measured by a NDIR module whose digital signal is also converted to a CANopen output signal with CiA DS 301 specification. 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 104 temperature, relative humidity and CO2 sensor meets the ingress protection of IP 30 according to EN 60 529, 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 colour of the box white or grey.
The STHC 104 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