NDIR SF6 Sensor 10 years life for SF6 Gas Leakage detection


sf6 is a non-dispersive infrared (NDIR) gas sensor, used for ambient air monitoring, using dual-wavelength technology. It is specially designed for SF6 leakage, quality and purity analysis inside gas insulated switchgear (GIS).

RSS-SF6 sensor has the characteristics of long-term stability, good repeatability, reliable performance, high precision, easy calibration, etc.

Modbus ASCII or RTU data communication provides multiple options to connect RSS-SF6 sensors to the controller.

Technical Parameters

Measurement principle: dual wavelength, non-dispersive infrared (NDIR),

Measuring range: 0-50/1000/1500ppm

Gas supply: by diffusion (atmospheric pressure)

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

<11 minutes (Fade out completed)

<30 minutes (full specification)

Measurement response

Response time (t90): appr. the 60’s

Digital resolution (@ 0): 1ppm

Repeatability: ≤±15ppm

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

Long-term stability (span): 12 months≤±30ppm

Long-term stability (zero): ≤±25ppm during 12 months

The influence of T and P

Temperature dependence (zero): ≤±1.5 ppm /℃

Temperature correlation (span): ≤±3ppm /℃

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

Electrical input and output

Power supply voltage: 6.5 V-9 V DC

Power supply current (peak value): <140ma

Inrush current: <600ma

Average power consumption: <800mw

Output signal: rs485, 4-20mA

Climatic conditions

Working temperature: -20°C + 40°C

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

Environmental humidity: 0-95% relative humidity (non-condensing)

Typical values ​​are related to 1013 hPa and 22°C, used for drying (non-condensing) and cleaning the sample gas. The stated value does not include calibration gas tolerances.