MultiGas Infrared Module NDIR

  • NDIR Sensor = non-dispersive infrared sensor
  • Featuring high-performance light-emitting diodes (IR-LED) and thermal micro-radiators

Overview

The RITTER MultiGas Sensors NDIR Module (non-dispersive IR sensor) has been specially developed for use in high-quality gas analysis. In the design phase special emphasis was placed on high stability and a low detection limit. These goals could be fully achieved by using high-performance light-emitting diodes (IR-LED) and thermal micro-radiators which were adapted to the requirements of gas detection. In the spectral range from 2 μm to 12 μm, carbon dioxide, carbon monoxide, hydrocarbons, water vapor and sulfur hexafluoride can be safely detected down to the ppm range with this innovative sensor platform.

The various photometric components such as detectors, emitters, measuring sample cell, etc. will be assembled user-specifically in a high-quality tabletop casing by RITTER.
RITTER MultiGas Sensorgehäuse

Applications

  • Biogas research
  • Environmental and process measuring technology
  • Elemental analysis
  • TOC-analyzers
  • Industrial gas analysis
  • Natural gas analysis

Characteristics and Benefits

  • Group of detectable gases:
    CO2 CO N2O CH4 CnHm* CF4 SF6 H2O
  • Measurement technology: NDIR-Sensor (non-dispersive IR sensor)
  • Measurement accuracy ±2% of Full Scale (F.S.)
  • No cross-sensitivity to H2
  • Operating temperature: 5 – 45 °C
  • Operating pressure: 800 – 1200 mbar (hPa) abs.
  • Flow rate range: 1 ltr/day – 100 ltr/h
  • Warm-up time: 2 min
  • Response time (t90): ≈ 3 sec
  • Interface USB, on request RS 232
  • Sensor cuvette: Aluminum, gold plated for sensor length 100 ≥ mm
  • Incl. temperature compensation
  • Incl. data acquisition software
  • In tabletop casing, overall dimensions W x H x L 171 x 85 x 246 mm, weight approx. 1,9 kg
  • Gas connection: PVDF screw-type tube connection for tube Øi 4 mm, Øa 6 mm
  • Power supply: 24 VDC (incl. power plug 100 – 240 VAC / 24 VDC)

Recalibration

  • Readjustment of the zero-point is recommended once a week.
  • Contamination of the measuring cuvette can lead to shifting of the end-point. Due to the integrated filter, re-adjustment of the end-point is generally not required – but can be performed once a year.
  • Additionally, cartridges filled with an inert and the respective test gas for recalibration of the zero and end-point can be provided.
  • Long-term drift is < 1% of Full Scale (F.S.) / 24 h.

Additional sensors / Sensor options

Oxygen Sensor

  • Electrochemical sensor
  • Measuring ranges:
    • Standard version 0 – 25 % or 0 – 100 %
    • H2S resistant version 0.5 – 35 %
  • Measurement accuracy ±2 % of span (full scale)
  • Resolution: < 0.5 % of span (full scale)
  • Response time (t90): 5 - 10 s; automotive version < 3.5 s
  • Lifetime: approx. 5 years
Read MoreOxygen Sensor

Pressure Sensor

  • Pressure compensation of measured gas concentrations
  • Measuring ranges:
    • Standard version 800 - 1,200 mbar abs.
    • H2S resistant version 0.2 – 3.5 bar abs.
  • Measurement accuracy ±1% of span (full scale)
  • Resolution: <1 mbar (2 mbar for H2S resistant version)
  • Response time (t90): 1 s
  • Incl. temperature compensation
Read MorePressure Sensor

Downloads

V 1.0 / Rev. 2023-03-21 / Subject to alterations.

The most recent version of this data-sheet can be found at …
https://dlr.ritter.de/en/products/multigas-sensors/multigas-infrared-module-ndir/

Dr.-Ing. RITTER Apparatebau GmbH & Co. KG · Coloniastrasse 19-23 · D-44892 Bochum · Germany
For questions please contact mailbox@ritter.de or your local distribution partner (on our overview page)