Description
- product model:mq135.product type:semiconductor gas sensor.standard package:bakelite (hei jiaomu).detection of gas:ammonia,sulfide,benzene vapor.detection concentration:10-1000ppm (ammonia,toluene,hydrogen).the standard circuit conditions:1 circuit voltage:vc = 24v dc.2 heating voltage v (h):5.0v + 0.2v ac or dc.
- 3 load resistance r (l):adjustable.standard test conditions:1 temperature,humidity:20 c + 2 c,65% + 5%rh;2 standard test circuit:0.1v + v;vc:5.0v (h) 0.1v +:5.0v.3 preheating time:no less than 48 hours.
- for the family environment,harmful gas detection device is suitable for the detection of aromatic compounds in ammonia,sulfide,benzene,steam,smoke and other harmful gas gas,gas sensitive element concentration range:10 to 1000ppm.
- product appearance size:32 (l) *20 (w) *22 (h).electrical performance:input voltage:dc5v power (current):150ma.do output:ttl digital volume 0 and 1 (0.1 and 5v).ao output:0.1-0.3v (relatively non polluting),the maximum concentration of about 4v.
- connection mode:1 vcc:connected to the power supply cathode (5v).2 gnd:connected to the negative power supply.3 do:ttl switch signal output.4 ao:analog signal output.
this is a mq-135 air quality sensor. the gas sensing material used in the mq135 gas sensor is two tin oxide (sno2), which has a lower conductivity in clean air. the conductivity of the sensor increases with the increase of the gas concentration in the air when the sensor is polluted. a simple circuit is used to convert the change of electrical conductivity to the output signal corresponding to the gas concentration. mq135 sensor for ammonia, sulfide, benzene vapor high sensitivity, smoke and other harmful monitoring is also very good. this sensor can detect a variety of harmful gases, is a suitable for a variety of applications of low cost sensors.
