| 摘要 |
The invention relates to a buried type gas sensor system, comprising a housing with a wedge shape of which inner part is hollow, which includes a plurality of gas suction holes at the lower end of wedge and a discharging hole for discharging the toxic gas of lower end at the upper end; a gas sensor which is installed at the lower end in the housing, and detects the concentration of toxic gas sucked from the soil through the suction hole; a moving stopper for ventilation which is tightly arranged in the housing and opens and closes a discharging hole by moving in the vertical direction; a motor or solenoid device which moves the moving stopper in the vertical direction; and a controlling display which controls the driving of the motor or solenoid device and the sensor and displays the measuring data. The invention provides an apparatus which sufficiently ensures the desired amount of toxic gas discharged from the soil in large quantity, improves the detection efficiency by controlling the temperature and humidity for detecting and measuring the concentration of gas, and detects the toxic gas stably and precisely and measures the concentration by comprising the effective gas discharging structure to prevent the detection error that results from saturation condition of toxic gas, all due to the simple configuration. |
