Smart SF6 Sensor

RSS-SF6 is Non Dispersive Infrared (NDIR) gas sensor for ambient air monitoring using dual wavelength technology. Especially designed for the analysis of SF6 leakage, quality and purity inside gas insulated switchgears (GIS).

RSS-SF6 sensor has long term stability, repeatability and reliable performance and high-precision and easy to calibrate

Modbus ASCII or RTU data communication offer a variety of options to connect the RSS-SF6 sensor to a controller.

Technical parameter

Measurement principle: Dual wavelength, Non Dispersive Infra-Red (NDIR),


Measurement range: 0-50/1000/1500ppm


Gas supply: by diffusion (atmospheric pressure)


Warm-up time: < 2 minutes (start-up time)


             < 11 minutes (fade in finished)


< 30 minutes (full specification)


Measuring response


Response time (t90): appr. 60 s


Digital resolution (@ zero): 1 ppm


Repeatability: ≤ ± 15 ppm


Linearity error (straight line deviation): ≤ ± 20 ppm


Long term stability (span): ≤ ± 30 ppm over 12 month period


Long term stability (zero): ≤ ± 25 ppm over 12 month period


Influence of T and P


Temp. dependence (zero): ≤ ± 1.5 ppm per °C


Temp. dependence (span): ≤ ± 3 ppm per °C


Pressure dependence: ± 0-100 % of measurement value / hPa


Electrical inputs and outputs


Supply voltage: 6.5 V-9 V DC


Supply current (peak): < 140 mA


Inrush current: < 600 mA


Average power consumption: < 800 mW


Output signal: RS 485, 4-20mA


Climatic conditions


Operating temperature: -20°C + 40 °C


Storage temperature: -20°C + 60 °C Air pressure: 800-1150 hPa


Ambient humidity: 0-95 % relative humidity (not condensing)


Typical values related to 1013 hPa and 22 °C for dry (not condensing) and clean sample gas. Stated values exclude calibration gas tolerance.