Data Sheet

MD62 Thermal conductor CO

Gas sensor

MD62 gas sensor consists of an active element and a reference element with the same resistance,

both elements are placed in a wheatstone bridge circuit, The analyzing gas contents changes, the

overall thermal coefficient of mixed gases changed correspondingly; when the active element meet the

combustible gas, its resistance become smaller, when It meet other gas, , Its resistance become

larger(air background), the bridge circuit output the voltage change, this change increase according to

gas concentration, the reference element as a benchmark while for temperature compensation.

Features

Wide Detecting Range (0—100%VOL)

Linear output signal

Quick response

Good reproducibility and reliable performance

Resistant to toxicosis

Detecting without Oxygen or short of oxygen

Application

Domestic, Industrial spot for CO2、CcL4、freon、Natural

gas, LPG etc detecting.

Structure Basic testing circuit

Specification

Detecting Range 0~100%vol

Working Voltage (V)

3.0±0.1

Working current(mA) @100

10%Methane >12

10%Butane >8

Sensitivity

10%CO

linearity（%）

0~5

Response time (90%)

>10sec

Resume time (90%)

>30sec

Using Environment -20－+60℃ <95%RH

Storage Environment -30—+80℃ <95%RH

Dimension（mm） 10×14×18

PAGE 1
MD62 Thermal conductor CO2 Gas sensor MD62 gas sensor consists of an active element and a reference element with the same resistance, both elements are placed in a wheatstone bridge circuit, The analyzing gas contents changes, the overall thermal coefficient of mixed gases changed correspondingly; when the active element meet the combustible gas, its resistance become smaller, when It meet other gas, , Its resistance become larger(air background), the bridge circuit output the voltage change, this change in
PAGE 2
Sensitivity and response characteristic Long term stability The drift in air is less than 2 mV per year, in 20%CO2 the drift is less than 2mV. for a short period storage (in 2 weeks), the sensor need 30mins’ preheating to stabilize, for more than one year storage, it need more than 24 hours’ preheating. MD62 output singnal dependency on working voltage Note △ The sensor sensitivity need to calibrate termly.