Sell Sensor

We offer sell sensor .5a-mp4
1-, low consumption, heating current within 80ma.
2-, small size, high sensitivity especial for ch4.
3-, long life, high stability.
4-, simple application circuit.
5-, widely used in house gas alarm, car gas alarm, common portable gas alarm, flammable heating water gas alarm, burning equipment gas alarm, and so on.
model 5a-mp4
sensor type semiconductor gas sensor
standard encapsulation metal cap
target gas ch4, nature gas, butane
temperature range usage:﹣10℃～﹢55℃
storage:﹣20℃～﹢75℃
humidity range ≦ 95﹪rh
detection range 300~10000ppm
standard circuit conditions loop voltage vc 5v~24vdc
heater voltage vh 5v±0.1vdcac
load resistance rl adjustable (1k-20k)
sensor character under standard
test conditions heater resistance rh 85ω±15ω (room tem.)
heater consumption ph ≦400mw，(vh=5v，ih 80ma)
sensitivity ls(rs) α≤0.6 ，rs（3000ppm）rs（air）
sensitive resistance rs rs=（vc／vrl－1）*rl
concentration slope α ≤0.6(r5000ppmr1000ppm ch4)
respond time tx ≤10s
revovery time th ≤30s
standard test conditions temp. Humidity 20±2℃，65±5%rh
standard test circuit vh= vc=5v±0.1vdc; rl=4.7k±1%
preheat time ≧ 12 hours
calculation method of the sensor power：ps= vc* vc* rs／(rs+ rl)* (rs+ rl)