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.