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INFRA.sens® AK250 TBH – high precision NDIR Gas Sensor for N₂O, CH₄ and CO₂

INFRA.sens® AK250GC TBH V5
INFRA.sens® AK250GC TBH V5 – THE PICTURE SHOWN IS ONLY A REFERENCE, THE ACTUAL PRODUCT MAY DIFFERENTIATE INSIDE.
Gases:
Table of Contents

Applications

Options

Features & Benefits

  • Low detection limit N₂O without CO₂ interference
  • Temperature controlled at 50°C
  • Low drift
  • Internal pressure compensated
  • Different interfaces (RS232, CAN-Bus,Analog
  • MARS-Tool (Datalogger and Controlsoftware)

Sensor Configurations

    Gas Channel 1 (*) Gas Channel 2 (*) Gas Channel 3 (*) Gas Channel 4 (*) Options (**)
Triple Gas Module 3.1 O₂ P H
(*) If several gases are displayed in one column, only one gas can be selected per column
(**) O₂ = Oxygen, P = Pressure, H = Humidity

List of measurement ranges

  Measuring range (*)
100
Vol.%		 50
Vol.%		 30
Vol.%		 20
Vol.%		 10
Vol.%		 5
Vol.%		 1
Vol.%		 5,000
 ppm		 2,000
 ppm		 1,000
 ppm		 500
 ppm		 300
 ppm		 100
 ppm		 50
 ppm		 10
 ppm		 1
 ppm
CH₄
N₂O
CO₂
(*) Full scale value (F.S.)
For other measuring ranges please refer to our further datasheets

Technical Drawing (Dimensions)

Technical Data

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 CAN-Bus
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)
*stable climatic conditions recommended, please check dewpoint considerations

Subject to change without notice. // 2024-05 Rev.01

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