9PCS MQ-2/3/4/5/6/7/8/9/MQ135 Smoke Sensor Module High Quality Gas Detector for Arduino

9PCS MQ-2/3/4/5/6/7/8/9/MQ135 Smoke Sensor Module High Quality Gas Detector for Arduino

Description:
- MQ-2 gas sensor sensitive material used in the low conductivity tin oxide (SnO2) clean air. When there is the environment in which the combustible gas sensor, conductivity sensor with increasing concentration of combustible gases in air increases. Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ gas sensor is high on gas, propane, hydrogen sensitivity of detection of natural gas and other flammable vapors are also very good. This sensor can detect a variety of flammable gas, is a low-cost sensors for a variety of applications.
- It can be used in homes and factories leakage monitoring device suitable for the detection of gas, butane , propane , methane , smoke , etc.

Features:
- Using high-quality dual-panel design, with power indicator and TTL signal output instructions
- The switching signal having a DO (TTL) output and analog output AO
- TTL output valid signal is low level (Low-level signal when the output light can be directly connected to the micro-controller or relay module)
- Higher concentration, higher analog output voltage
- It has better sensitivity to methane and natural gas
- There are four screw holes for easy positioning
- Size: 32 x 20 x 22mm
- It has long endurance and reliable stability
- Rapid response and recovery characteristic

Specification:
- Input voltage: DC5V
- Power consumption (current): 150mA
- DO output: TTL Digital quantity 0 and 1 (0.1V and 5V)
- AO output: 0.1 - 0.3V (relatively pollution-free), high concentration voltage is about 4V

Note:
- After the sensor is powered on, it needs to be preheated for about one minute to stabilize the measured data. Heating is a normal phenomenon because there is an electric heating wire inside, which is abnormal if it burn the hand.

Package Included:
- 9 x Sensor Module