STHC 102 - TEMPERATURE, RELATIVE HUMIDITY AND CO<sub>2</sub> TO THE INTERIOR WITH RS 485 OUTPUT (MODBUS)

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STHC 102 - TEMPERATURE, RELATIVE HUMIDITY AND CO₂ TO THE INTERIOR WITH RS 485 OUTPUT (MODBUS)

CONFIGURATOR

CONFIGURE AND REQUEST

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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.

Technické parametry

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 V_DC
Rated supply voltage U_n	24 V_DC
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.