INFRA.sens - Model AK250 TBH -High Precision NDIR Gas Sensor for N2O, CH4 and CO2

General features* :

• Measurement principle : Non-dispersive infrared (NDIR); dual beam; 3 wavelenghts including reference path
• Measurement range : Channel 1 – CH4 @ 1.000 ppm
• Channel 2 – N2O @ 2.000 ppm
• Channel 3 – CO2 @ 5 Vol.%
• Gas flow : 0.1 – 1.5 l /min
• Dimensions : 345 mm x 153 mm x 103 mm
• Weight : approx. 1510 g
• Tube connector : 4/6 mm tube
• Lifetime of IR radiation source : > 40 000 h
• F.S. full scale 1 related to Pa = 1020 hPa ; Ta = 25 °C ; flow = 1l /min

Measuring response* :

• Warm-up time : < 45 min 3
• Response time (t90) : < 5 s
• Detection limit (3·σ) : CH4 : 2.5 ppm
• N2O : 0.5 ppm
• CO2 : 5 ppm
• Linearity error : CH4 : < 5 ppm
• N2O : < 5 ppm
• CO2 : < 50 ppm
• Repeatibility : CH4 : < 5 ppm
• N2O : < 5 ppm
• CO2 : < 50 ppm
• Long term stability (zero) : CH4 : < ± 10 ppm /month
• N2O : < ± 20 ppm /month
• CO2 : < ± 100 ppm /month
• Long term stability (span) : CH4 : < ± 5 ppm /month
• N2O : < ± 5 ppm /month
• CO2 : < ± 50 ppm /month
• Temp. Influence zero : < 0.2 %F.S. /10K
• Temp. Influence span : < 0.4 %F.S. /10K
• Cross sensitivity : CH4 @ 1.000 ppm ⇒ N2O : - 5 ppm // ⇒ CO2 : 10 ppm
• N2O @ 2.000 ppm ⇒ CH4 : < 5 ppm // ⇒ CO2 : 10 ppm
• CO2 @ 5 Vol.% ⇒ CH4 : - 2 ppm // ⇒ N2O : - 2 ppm
• Pressure influence : < 0.01 % /10 hPa of reading
• 2 full specification, demands to environmental conditions // 3 depends on digital filter settings // 4 at zero point with N2 // 5 to each calibrated gas channel, other gases on request // 6 with pressure compensation

Electrical inputs and outputs :

• Supply voltage : 24 (15 – 30) VDC
• Supply current (peak) : < 1.2 A
• Power consumption (average) : < 10 W
• Digital output signal : RS 232 (ASCII) or CANbus

Climatic conditions :

• Operating temperature* : 5 – 45 °C 7
• Storage temperature : - 20 – 60 °C
• Air pressure : 300 – 1200 hPa (mbar)
• Ambient humidity : 0 – 95 % rel. humidity (not condensing)