Kleinstlösung für kontinuierliche Echtzeit- H₂S / CH₄S Überwachung

Cairsens® H₂S / CH₄S

Der Cairsens©-Sensor ermöglicht eine spezifische Schadstoffmessung, die mit Referenzmethoden vergleichbar ist. Die qualitativ hochwertigen Sensoren sind weltweit bei unseren Kunden bekannt, die auf der Suche nach den neuesten Technologien zur Überwachung der Luftqualität sind.

Sie bieten präzise und zuverlässige Messungen und werden mit einem Referenznormalwert kalibriert. Sie werden mit einem einzigartigen Kalibrierzertifikat geliefert und benötigen nach der Installation während ihrer Lebensdauer (12 bis 15 Monate) keine Kalibrierung mehr.

Eine ausgezeichnete Messgenauigkeit wird durch die Begrenzung des Einflusses von Feuchtigkeitsinterferenzen durch die Verwendung eines spezifischen und patentierten Einlassfilters in Kombination mit dynamischer Probenahme erreicht.

  • H2S / CH4S-Mikro-Sensor
  • Drei Bereiche verfügbar: 0 – 1, 0 – 20 oder 0 – 200 ppm
  • H2S / CH4S real-time monitoring
  • Very high sensitivity to capture low level gas concentrations (down to ppb)
  • Accurate measurement data at a fraction of the cost of Reference Analyzers
  • No maintenance required during the Cairsens®’s lifetime
  • No need for re-calibration during 12 months
  • Embedded USB and UART / ModBus communication ports
  • Up to 20 days of 1-minute data storage capacity
  • Ultra-small, with close to zero power consumption
  • Ready to use and easy to integrate
  • Measurements meet European directive 2008/50/EC for indicators
Cairsens® are manufactured in France and calibrated in our metrological laboratory using Standard Reference AQMS monitors. Every sensor shipped includes a calibration certificate.
  • Indoor and outdoor air quality monitoring: smart cities, road-side & tunnels, schools, airports, ship terminals…
  • Odor monitoring: WWTP, recycling, pulp and paper manufacturing, sewage treatment facilities, refineries
  • Leak detection and monitoring of fugitive emissions: quarries, storage facilities, mines, manufacturing plants
  • Providing data for air dispersion modelling
  • Health and safety: mines, industrial sites, construction
  • Forecasting of industrial fence line emission
Technical Specifications
Measured Parameter H2S / CH4S
Article code A40-0401 | A40-0402 | A40-0403
Measuring Range (ppm) 0 – 1 | 0 – 20 | 0 – 200
Certified* Detection Limit (ppm) 0.01 | 0.03 | 0.2
Resolution (ppm) 0.001
Operating Temperature (°C) -20 to +40
Operating Relative Humidity (% HR) 10 to 90 (non-condensing)
Sensor Type Electrochemical


Metrological performances according to the European Directive 2008/50/EC are guaranteed for 12 months
Storage conditions
Temperature (°C) +5 to +20
Relative Humidity (% HR) > 15 (non-condensing)
Duration of Storage (Max) 6 months
Technical specifications
Sampling method Dynamic air sampling, with a controlled micro-fan
Power supply 5VDC / 500mA, USB port of a PC or Power bank type «Always on» (not provided)
Power consumption 20 mA max under 5 VDC
I/O communications USB, UART, Modbus RTU-TTL. Modbus RS485 on request (article code A40-0219)
Lifetime duration 24 months
LCD Display Concentration in ppb or ppm, operating status, memory available…
Control & data treatment Internal microprocessor for data acquisition and treatment, embedded timer
Data Storage (internal) 20 days for 1 min data, 303 days for 15 min data or 1212 days for 60 min data
Download data mode – Cairsoft (free download)
e-SAM DAHS system or Customized integration
Cairnet® Mini-stations with data exported in the Caircloud®
Weight 55 g
Cairsens® are manufactured in France and calibrated in our metrological laboratory using Standard Reference AQMS monitors. Every sensor shipped includes a calibration certificate.


Compliance to environmental regulations
Electrical safety NF EN 61010-1: 2010
Electromagnetic Compatibility NF EN 61326-1: 2013
Protection Index IP 42 (according to IEC 60529)
European directive 2008/50/EC