Eltek - Model GD47AC -Transmitters for Air Quality Monitoring

• Built in digital RH, temperature and CO₂ (0-5000ppm) sensors, ensuring fast and accurate measurement and requiring no analogue adjustment.
• Calibration values are stored in the transmitter and the CO₂ sensor includes a daily auto calibration feature.
• CO₂ is measured every 2 minutes independent of the transmission interval.
• Transmitter is powered from an external 12VDC supply (type MP12U) and is equipped with built-in rechargeable batteries to sustain operation for up to 100 hours in the event of AC mains supply interruption.
• Availability of the external supply is continuously monitored and can be presented as a channel of data. This means an AC power failure can be investigated or alarmed before the internal batteries become discharged.

CO₂

•  Accuracy at +25 ºC, 1013mBar: 0-5000ppm < ± (50ppm + 3% of measured value) 2
• Temperature dependence: typically 2ppm CO2 / ºC over the range 0 to +50ºC
• Pressure dependence: ± 0.015 mbar/K
• Operational temp range: RH: 5 to 95% non condensing, -10 to +50 ºC (Functional at -20ºC)

Relative Humidity

• Range: 0-100%
• Accuracy: ± 1.5% (0 to 80% RH), ± 2.0% (80 to 100% RH)
• Resolution: 0.1%

Temperature

• Range: -30ºC to 65ºC
• Accuracy: ± 0.1ºC (+20ºC to +50ºC )
• Resolution: 0.1ºC

RF component compliant to EN300-220-2.
Operating frequency: 434.225Mhz (other frequencies available)
Environment rating: IP30 (A secondary enclosure is available for out door use)