AO-RL2/A VOC Room Air Quality Sensor for Mixed Gas with LED Display

Fuehler Systeme


Room Air Quality Sensor for Mixed Gas (VOC) with LED Display

  • 0...100% mixed gas VOC
  • 0-10 V, 0/4-20 mA, Relay
  • automatic re-calibration
  • LED status lamp

250,00 €

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The instrument measures: Air Quality - VOC
The Sensor measures: VOC

The AO-RL2/A mixed gas sensor (VOC) with LED display measures the air quality in the range of 0...100% referring to the calibration gas. For further processing it provides a linear output signal 0-10 V, 0-20 mA, 4-20 mA and a change-over contact. The normal air quality of the enviroment can be defined for standard by manual calibration on the device (zero point adjustment). The air quality sensor runs in regular intervals an automatic calibration procedure, therefore long-term drifts and deterioration by operation can be completely eliminated.

Measurement range VOC 0...100% (good / bad air quality, referring to the calibration gas)
Accuracy ±15% FS
Response time (t90) max. 60 s (at 5% alteration)
Long term stability < 15% FS/year at norm load
Sensor metal oxide VOC-sensor
Sensor protection mounted inside housing
Running-in time 1 hour
Supply voltage 24 V AC/DC (±5%)
Current consumption max. 60 mA
Analogue output 0-10 V 3-wire connection, min. load resistance 100 kOhm
Analogue output 0/4-20 mA 3-wire connection, load resistance < 500 Ohm
Alarm output potential-free change-over contact max. 48 V (1 A), threshold can be defined by 270° potentiometer
Equipment LED display: 1-3 green (good), 4-7 yellow (average), 8-10 red (bad)
Electrical connection screw terminals max. 1,5 mm²
Housing ABS polyman, colour signal white like RAL 9003
Cable gland at the backside of the housing
Dimensions Housing: L 82 x W 82 x H 25 mm
Weight ca. 70 g
Protection type IP30
Protection class III
Working range r.H. 0...98% r.H. in contaminant-free, non-condensing air
Working temperature 0...+50°C
Storage temperature -20...+50°C
Initial operation After switch-on of the device follows a self-test and the tempering, which takes ca. 1 h depending on the environmental conditions. At this time the analogue output drifts from the actual measurement value.
Automatic calibration The automatic re-calibration of the output signal is started in the interval of 4 weeks and can be disabled. The device must be supply within this interval at least 10 minutes with fresh air.
Manual calibration The manual calibration of the output signal to 1V (zero point) will be started by pushing the button on the circuit board (push ca. 5 s until LED is blinking). Before this it is to ensure a non-stop operating of min. 2 h on air quality which is defined as normal. After successful calibration the LED will be deactivated.
Installation on-wall or on flush-mounted box
Approvals CE-conformity, EAC, RoHS

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