The detector uses DS18B20 temperature sensor chip ,each pin of which is separated by heat shrinkable tube,to prevent short circuit and internal sealing glue,water proof and moisture proof.
- High quality stainless steel tube package,water proof,moisture proof and rust proof
- Each detector is single packaged after strict test.
- 3.0V ～ 5.5V power supply
- 9-12 bits adjustable resolution
- Temperature-detect range wide -55℃ ～ +125℃
- Need no external components,unique single-bus interface
Type : MQ-2(Used in homes and factories, gas leakage monitoring devices, suitable for the detection of liquefied petroleum gas, butane, propane, methane, alcohol, hydrogen gas, smoke, etc..)
- Gas: smoke
- Detection range: 300 to 10000ppmm
- The characteristics gas: 1000ppmm, isobutane
- Sensitivity: R in air / Rin, typical gas ≥ 5
- Sensing Resistance: 1KΩ 50ppm toluene to 20KΩ in.
- Response time: ≤ 10s
- Recovery time: ≤ 30s
- Heat resistance: 31Ω ± 3Ω
- Heating current: ≤ 180mA
- Heating voltage: 5.0V ± 0.2V
- Heating power: ≤ 900mW
- Measuring voltage: ≤ 24V
- Working conditions of ambient temperature: -20 ℃ ~ +55 ℃
- Humidity: ≤ 95% RH
- Environmental oxygen content: 21%
- Storage conditions Temperature: -20 ° C to +70 ° C
- Humidity: ≤ 70% RH
Documents:Manual técnico MQ-2
Ejemplo de conexiones.