MP-4 datasheet(4/7 Pages) WINSEN

4 / 7 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

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

sensor: heating voltage (VH) and circuit voltage(Vc). VH is used for supplying a certain

temperature which can be DC or AC. VRL is 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

Fig5.Response and Resume curve

Fig6.Linear curve

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 5000ppm CH4 gas under different tem. and

humidity. Rso means resistance of the sensor in 5000ppm CH4 gas

under 20℃/65%RH.

时间(S)

MP-4线性曲线

0.5

1.5

2.5

3.5

甲烷浓度（ppm）

CH4

Air

Alcohol

C3H8

Fig2.Test circuit for MP-4

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