Infrared plus Ultraviolet Sensor

Infrared plus Ultraviolet Sensor


CO2 / CO / NO / CH4 / CnHm / N2O SO2 / NO2 / O3 / CL2 / H2S

The third »RI.sens Multiline« module is a combination of both NDIR and NDUV Module on a common board. With this unit, up to 3 gas components can be measured simultaneously. The basic electronics can supply IR and UV radiation sources with different frequencies for 0 Hz (DC) to 100 Hz (AC). This system is an ideal tool for detecting multi-component gas at low ppm levels.

»RI.sens Multiline« Modul 3 / ND-IR- & ND-UV-Sensor

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 RI.sens Multiline Module


  • 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, NO, CH4, CnHm und SO2, NO2, O3, Cl2, H2S
  • Measurement accuracy ±2% of span (full scale)
  • No cross-sensitivity to H2
  • Operating temperature: 5 - 45 °C
  • Operating pressure: 800 - 1200mbar (hPa) abs.
  • Flow rate range: 1 ltr/day – 100 ltr/h
  • Warm-up time: IR 2 min / UV 1 min
  • Response time (t90): ≈ IR 3 s / UV 1-2 s depending on gas
  • Interface: USB, on request RS232
  • IR Sensor cuvette: Aluminum, gold plated for sensor length ≥ 100mm
  • UV Sensor cuvette: Stainless steel with inert coating inside and outside; PEEK for corrosive gases (H2S, chlorine) on request
  • Incl. temperature compensation
  • Incl. data acquisition software
  • Power supply: 24 VDC (incl. power plug 100 - 240 VAC / 24 VDC)


  • Readjustment of the zero is recommended once a week.
  • Contamination of the measuring cuvette can lead to misalignment of the end point. Due to the integrated filter, readjustment of the endpoint 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 less than 1% FS (Fullscale) / 24 h.

Options / Additional sensors

Rev. 2020-11-13 / Subject to alterations.