Low Price High Quality Carbon Monoxide CO Sensor - MQ-D7

Product Specification

Low Price High Quality Carbon Monoxide CO Sensor

Specification:

MQ-D7 is a semiconductor carbon monoxide gas sensor which is mainly used as sensor element for detect carbon monoxide gas on leak detection and alarm equipment, It uses advanced flat production process, from the heater and micro- Al2O3 forming a metal oxide semiconductor material constituting the ceramic substrate , with the electrode wire leads, encapsulated in a metal tube housing, cap . When detecting the presence of gas, the gas concentration in air is higher, the higher the conductivity sensor, using a simple circuit that can change the conductivity of the gas is converted to an output signal corresponding to the concentration.

Character:                                          

1. High sensitivity to Carbon monoxide gas

2. Low power consumption                        

3. Fast response and resume

4. Good stability and long life                        

5. Simple drive circuit

6. Small size

Application:

1. Domestic gas leakage detector

2. Industrial gas detector

3. Portable gas detector

Notes:

At first, heating voltage should use 5 V preheat 3 to 5 minutes, then use 1.5 V heating test 1 to 3 minutes after that, use 5V again heating cleaning 10 to 15 seconds and then converted to 1.5 V test 1 to 3 minutes, cycle operation.

Technical Parameter:

Gas: CO Gas
Detection range: 10 to 1000ppm

Characteristic gas: 100ppm Carbon monoxide gas
Sensitivity: R in air / R in typical gas ≥ 5
Load Resistance: 1～50Ω adjustable
Response time: ≤ 30s
Recovery time: ≤ 60s
Heating current: <=30mA
Heating voltage: 1.5V
Measuring voltage: 5V
Operating Conditions Ambient temperature: -20～+55℃
                         Humidity: ≤ 95% RH
                         Environmental oxygen content: 21%
Storage conditions Temperature: -20～+70℃ 

                           Humidity: ≤ 70% RH