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SEM226C Tunnel Visibility Detector

SEM226C Tunnel Visibility Detector is an integrated detector of visibility and harmful gases specially designed and manufactured for tunnels and pipe galleries. It is well known that tunnels and pipe corridors are special tubular structures. Due to the small space and the characteristics of airtightness, the internal harmful gases and dust particles are not discharged in a timely and reasonable manner, resulting in the accumulation of harmful suspended particles such as CO and dust. It will be directly related to the personal safety of vehicle drivers and pipeline maintenance staff passing through the tunnel.

SEM226C Tunnel Visibility Detector is an integrated detector of visibility and harmful gases specially designed and manufactured for tunnels and pipe galleries. It is well known that tunnels and pipe corridors are special tubular structures. Due to the small space and the characteristics of airtightness, the internal harmful gases and dust particles are not discharged in a timely and reasonable manner, resulting in the accumulation of harmful suspended particles such as CO and dust. It will be directly related to the personal safety of vehicle drivers and pipeline maintenance staff passing through the tunnel. SEM226C series is designed to collect VI/CO data online and provide it to the safety supervision department to provide decision-making basis for tunnel ventilation and pipe gallery environmental safety.

Parameters

Measuring rangeVI (Visibility): 20-6000m
K (light reduction value): 0–35X10-3 1/m.
CO: 0-500PPM ; NOx: 0-10 ppm ; CH4: 0-100% (optional)
Working environmentTemperature: -20…+55 C ; Humidity: 10… 100 %
Signal outputDigital output: RS485/RS232; Analog output: 4 channels 4- 20mA
Communication protocolModbus RTU
Output modeRS485 output, Dry contact pulse output
Switch output4 relay contacts (48V DC, 0.5 A, 24W)
Power and Power Consumption85-305VAC/100-430VDC ; 47-63Hz / MAX60W (including heating)
Dimensions and weight320* 290*180mm/less than 2.2kg
Installation methodwall mount

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