sensortec AG - KACQTH-xxx - Duct air quality sensor CO2 and VOC

Installation

1. 1Wire the RS-485 A and B terminals of the sensortec AG KACQTH-xxx sensor to the corresponding Modbus RTU port on your ModbusCloud gateway (MCG or MLP series).
2. 2Supply the sensor with 24 Vac/dc and confirm the status LED indicates normal operation.
3. 3Set the Modbus slave address on the sensor according to the manufacturer instructions, ensuring it does not conflict with other devices on the bus.
4. 4Configure the gateway serial port to 19200 baud, even parity (parity 1) and one stop bit to match the sensor defaults.
5. 5Import the sensortec AG KACQTH-xxx template in the ModbusCloud portal and assign it to the correct gateway and slave address.
6. 6Verify that live readings for CO2, TVOC, temperature and humidity appear on your ModbusCloud dashboard.

Things to watch for

Registers (5)

5 read / 0 write

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