Additional specifications and description
Detect changes in CO or NO2 level
This toxic gas trend sensor offers a clear, visual indication of the evolution of the CO level via the green, yellow and red LEDs. The green LED indicates that the CO level remains stable - there is sufficient fresh air. When the CO level rises and enters the alert range, the yellow LED lights up. Red means: the CO concentration is increasing at an alarming rate and there is insufficient fresh air supply.
Three analogue outputs and Modbus RTU communication
The measured temperature, relative humidity and CO trend are available via the three analogue outputs and via Modbus RTU communication. The dew point and ambient light level can be read out via Modbus RTU communication only. This sensor has three analogue outputs. Each of them transmits one of the measured values. E.g. by default, output 1 will transmit 0 V at 0 °C and 10 V at 50 °C. Each output value varies proportionally in function of the measured temperature, relative humidity or CO trend. The measured temperature is available via output 1, relative humidity via output 2 and CO trend via output 3.
Monitor toxic gas concentrations
Next to Carbon monoxide (CO) and Nitrogen dioxide (NO2), this sensor will also detect changes in concentration of following gases: Ethanol, Hydrogen, Ammonia and Methane. When the concentration of these gases increase, the sensor output value will increase to increase the supply of fresh air. When the supply of fresh air reduces the concentration of toxic gases, the sensor output value will decrease again. The toxic gas sensor element is calibrated and tested in our factory. It doesn't require recalibration.
Surface mounting 
This trend sensor can be installed indoors on a wall or on a surface. The mounting holes are adapted to standard European wall mounting boxes. The sensor can be attached to the wall mounting box with two screws. The sensor enclosure will cover the entire wall mounting box. To ensure optimal performance, the sensor should be protected from direct sunlight.
Wiring via terminal blocks or via RJ45 connector
This sensor offers you the choice to connect it via the cage clamp terminal blocks or via the RJ45 connector. Supply voltage and Modbus RTU communication can be connected via the RJ45 connector. Via the terminal blocks it is possible to connect the outputs, Modbus RTU communication and the supply voltage. Never connect the supply voltage via the RJ45 connector and the terminal blocks simultaneously! The supply voltage is 24 VDC. The ground terminals of the power supply (V-) and output (GND) are internally not connected. This means that a 4-wire cable is required to connect this sensor. Most 24 VDC power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation.
Enclosure with contemporary design
The enclosure is designed for indoor use. It offers an IP30 protection against ingress of dust and moisture. The enclosure is designed and manufactured in-house in Sentera Plastics. It is exceptionally strong thanks to the use of high quality r-ABS plastic. Thanks to its contemporary modern design, this sensor can be used in most interior styles.
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