The Advanced Gasmitter uses NDIR technology and thermally conductive gas transducers for gas measurement in industrial applications.

NDIR AGM Brochure (English)
NDIR AGM Brochure (German)
Thermal Conductivity Brochure (English)
Thermal Conductivity Brochure (German)
AGM Specifications (English & German)
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Advanced Gasmitter

All advanced gasmitters offer high accuracy, long term stability and excellent repeatability. The flexible design platform enables easy integration for the system developer.

  • AGM Products
  • Features
  • Specifications
  • Options

AGM Series
Reliable Gas Measurement

  • AGM 10: CO2 / CH4
  • AGM 30: CO2 / CH4
  • AGM 31: CO2 / N2O
  • AGM 32: CO2 / N2O / C3H8
  • AGM 50: CO2
  • AGM 101: CO2 / CH4 / C6H14 / N2O in low concentrations
  • AGM 106: CO
  • AGM 22: H2 / He / Xe / Ne / Ar / SF6 (uses thermal conductivity in lieu of NDIR)
  • NDIR-Dual wavelength or thermal conductivity sensor for gas measurement
  • Proven and tested for over 13 years
  • Linearized analog output (current or voltage)
  • Analog output signal with selectable time constant
  • Output signal for 2 alarm thresholds
  • RS232 Interface
  • Zero and endpoint adjustable with potentiometers
  • Temperature compensated
  • European PCB format (160mm x 100mm)


Measuring principle:
AGM 10/30/31/32/50/101/106
Non Dispersive Infra-Red (NDIR) dual wavelength
Measuring principle:
AGM 22
Thermal conductivity principle
Measurement Response1
Linearity error: < ±2% FS*
Lower detection limit: < 1% FS*
Repeatability at zero: ±0.2% FS*
Repeatability at span: ±1% FS*
Long term stability: ±2% FS* (12 months)
Influencing Variables1
Temperature dependence at zero: ±1% FS* per 10K
Temperature dependence at span: ±2% FS* per 10K
Heating option: 55°C ± 5°C
Pressure dependence at zero: 0%
Pressure dependence at span: < 2% FS* per 10mbar non compensated;
<0.2% FS* per 10mbar with optional pressure compensation (in the range of 800 - 1200 mbar)
Time Response
Warm up: 10s operation (≤ 30 min. to approach all specified properties)
Response time (T90): 5 - 45s (depending on used sensor element, flow, tube length, digital attenuation)
AGM22 = 1-45s
Gas Inlet Conditions
Ambient temperature: 0 - 50°C in process
-20 - 60°C in storage
Gas pressure: 800 - 1200 mbar
Ambient humidity: < 95% RH (non condensing)
Flow range (gas): 0.1 - 0.750 l/min (constant)
Zero point calibration: with inert gas (e.g. nitrogen N2, or ambient air free from measurement gases)
Span point calibration: with sample gas mixtures
Adjustment: zero point and span point adjustable with potentiometer on the PCB.
Recalibration: At first initiation and depending on application and ambient conditions. Recurring cycles of recalibration are recommended.
Electric Properties
Operating voltage: 24 VDC (18-30VDC); 24 VDC (24-30VDC) with heating option
Power consumption: Max. 3W; 8W with heating option; 28W during warm up
Status / Failure visualization: Status and failure LED on the PCB
Status / Failure output: +5V HCMOS on 34-pin connector
Analog output (linearized): 0 - 20 mA, 4 - 20 mA;optional voltage output 0 - 1V, 0 - 5V, 0-10V
Max. 500Ω load at current output; ≤ 300Ω burden at voltage output
Digital output (linearized): RS232 Interface (V.24/V.28) 12 bit resolution
Dimensions / Materials
PCB dimensions: 160mm x 100mm (European PCB format); Height: 45mm (includes connectors and tubes)
Weight: max. 800g
Tube connector: 3mm (outside diameter); Hose inside diameter < 3mm
Materials in contact with medium AGM 10/30/31/32/50/101/106: Sample cell: Aluminum or gold-plated stainless steel
Window: CaF2, Al2O3 or Ge
Gas hoses: Viton®(FPM/FKM)
Hose connectoirs: nickel-plated brass
Filter: Polypropylene (PP)
Materials in contact with medium AGM22: Sample cell: Al, Si, SiOxNy, Au, Epoxy
Gas hoses: Viton®(FPM/FKM)
Hose connectoirs: nickel-plated brass
Filter: Polypropylene (PP)
Pressure compensation
Heating option
Certificate of compliance
*FS = Full scale
1 = Refers to 1013 mbar sample gas pressure, 25°C ambient temperature and 0.75 l/min constant gas flow
  • Pressure compensation
  • Heating option
  • Versions for gas diffusion operation available
  • Certificate of compliance