MQ-7 carbon monoxide gas detection sensor module

MQ-7 carbon monoxide gas detection sensor module
The MQ-7 carbon monoxide sensor module allows for the sensing of CO concentrations in the air.
This module can detect CO gas concentrations from anywhere between 20 and 2000ppm.
The sensor is highly sensitive and has a quick response time. It uses analogue resistance as
an output and is extremely easy to connect with the use of Arduino.
Please note: This module has an adjustable sensitivity and is not calibrated.
Specifications:
Test gas: carbon monoxide
Concentration detection: 10-1000ppmCO
Loop voltage: 10 V DC
HEATER Voltage: 5V ± 0.2V ACorDC (high), 1.5V ± 0.1V ACorDC (low)
Load resistance: adjustable
Heating resistance: 31 ± 3 (interior temperature)
Heat dissipation: 350mW
Surface resistance of sensitive part: 2K-20K
Sensitivity: Rs (in air) / Rs (100 ppmCO) 5
Concentration gradient: 0.6
Temperature, humidity: 20 ± 2.65% ± 5% RH
The standard test circuit: Vc: 5v ± 0.1v Vh (high): 5v ± 0.1v Vh (low): 1.5v ± 0.1v