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Room Air Quality Sensor for Mixed Gas (VOC) with LED Display
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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 with reference to the calibration gas.
For further processing it provides a linear 0-10 V, 0-20 mA, 4-20 mA and a contact output signal.
The normal ambient air quality can be defined for the manual calibration standard on the device (zero point adjustment).
The air quality sensor runs an automatic calibration procedure at regular intervals, thus long-term drift and deterioration due to 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 |
Model AO-RL2/A-UI:
Air Quality Transducer for mixed gas VOC in room housing, 10 LED traffic light, Outputs 0-10V or 4-20mA, Supply voltage 24 V AC/DC.
Model AO-RL2/A-UIR:
Air Quality Transducer for mixed gas VOC in room housing, 10 LED traffic light, with changeover contact, Outputs 0-10V or 4-20mA, Supply voltage 24 V AC/DC.
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