This module provides both digital and analog outputs. The threshold level for digital output can be easily adjusted using the preset on the board. The MQ-7 sensor module can be easily interfaced with Micro-controllers, Arduino and etc.
Standard Test Conditions
Temperature: 20°C ± 2°C
Humidity: 65% ± 5% RH
Standard Test Circuit: Vc: 5.0V ± 0.1V; Vh(high):5.0V±0.1V
Vh(low): 1.5V±0.1V
Features
The analog output voltage, the higher the concentration the higher the voltage.
The carbon monoxide detection with better sensitivity.
There are four screw holes for easy positioning.
With a long service life and reliable stability.
Rapid response and recovery characteristics.
Specification
| Operating voltage (v) | DC 5 |
| Range | 10 ~ 1000 ppm |
| Characteristic gas | 100 ppm CO |
| Sensitivity | ≥ 3%. |
| Return time | ≤ 30 sec |
| Heating resistance | ± 31 Ω |
| Heating current | ≤ 180 mA |
| Heating voltage | 5.0V ± 2V / 1.5 ± 1V |
| Heating power | approx. 350 mW |
| Ambient temperature (°C) | -20 ~ + 50 |
| Humidity | ≤ 95% RH |
| Oxygen content | 21%. |
| Length (mm) | 35 |
| Width (mm) | 20 |
| Height (mm) | 11 |
| Weight (gm) | 20 |
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