MP-2 datasheet(4/6 Pages) WINSEN

4 / 6 page

Zhengzhou Winsen Electronics Technology Co., Ltd

www.winsen-sensor.com

Tel: 86-371-67169097

Fax: 86-371-60932988

Email: sales@winsensor.com

Basic circuit

Fig2. Test circuit

This circuit shows the basic measuring circuit of sensor. Two voltage should be applied to this

sensor, heating voltage (VH) and test voltage (Vc). VH is used for supplying a certain temperature

which can be DC or AC. VRL the voltage on the load resistance (RL) which connects to the sensor

in series. Vc is supply the test voltage for RL and it must be DC.

Characterization

Fig3.Typical Sensitivity Curve

The ordinate is resistance ratio of the sensor (Rs/R0), the abscissa is

concentration of gases. Rs means resistance in target gas, R0 means resistance of

sensor in clean air. All tests are finished under standard test conditions.

Fig4.Typical temperature/humidity characteristics

The ordinate is resistance ratio of the sensor (Rs/Rso).Rs means resistance

of sensor in 2000ppm C3H8 gas under different tem. and humidity. Rso

means resistance of the sensor in 2000ppm C3H8 gas under 20℃/65%RH.

Air

C3H8

CH4

Smoke

Fig5.Sensing Curve

It shows VRL value when the sensor in C3H8 gas with different concentration.

RL=20kΩ, All tests are finished under standard test conditions.

Fig6.Response and Recovery

It shows the VRL changes when the sensor is put in target

gas (2000ppm C3H8) and then is take from it to clean air.

MP-2 Datasheet(PDF) 4 Page - Zhengzhou Winsen Electronics Technology Co., Ltd.