Art. No. MQ-135 Sensor for Ammonia. Aromatic Compounds etc.

產品介紹

MQ135 sensor for ammonia, aromatic compounds, sulfide, benzene vapor with high sensitivity, smoke and other harmful gases monitor is also satisfactory. This sensor can detect and measure a variety of harmful gases, sensor test concentration range: 10 to 1000ppm. Tin oxide (SnO2) is a low electrical conductivity material in clean air, but with combustible gas, itsconductivity increases. Using simple circuits, its changing in conductivity is changed into output signals. MQ-135 is used for domestic or industrial detection of ammonia, aromatic compounds,sulfide, benzene vapor with high sensitivity, smoke and other harmful gases monitoring

Operating voltage Vc: less than 24V

Heater voltage Vh: 5.0V ±0.2V

Load resistance: adjustable

Heater resistance: 31 ohm ± 3 ohm

Heater power consumption PH: <=900mW

Dimensions：32(L)*20(W)*22(H)

Standard test conditions:
Temperature: 20 degree ± 2 degree
Humidity: 65% ± 5% RH
Standard test circuit: Vc: 5.0V ± 0.1V
Vh:5.0V±0.1V
Warm up time: more than 48 hours.

Connection:
VC：DC 5V @150mA
DO：TTL output 0 and 1（0.1 and 5V）
AO：Analog output 0.1-0.3V（no contamination），maximum contamination 4V
Note：Sensor need 20 sec, to stabilize after turning on.