Zhengzhou Winsen Electronics Technology Co., Ltd

www.winsen-sensor.com

Tel: 86-371-67169097/67169670

Fax: 86-371-60932988

Email: sales@winsensor.com

Leading gas sensing solutions supplier in China!

Pins Definition

Stable 2.

PIN1

GND

PIN2

Output Signal

PIN3

VCC

S is the state output for the module:

In normal working state: Output is 5KHz wave, which occupies 20% ratio.

In failure state: Output is 5KHz wave, which occupies 80% ratio.

In alarm state: Output is 5KHz wave which occupies 50% ratio

Cautions

1 .Following conditions must be prohibited

1.1 Exposed to organic silicon steam

Module will lose sensitivity and never recover if it absorbs organic silicon steam. Module

must avoid exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon

environment.

1.2 High Corrosive gas

If the module is exposed to high concentration corrosive gas (such as H

etc.), it will not only result in corrosion of sensor’s heating material and pins, also it

causes sensitivity and performance attenuation.

1.3 Touch water

Sensitivity of the sensors will be reduced when spattered or dipped in water.

1.4 Freezing

Do avoid icing on sensor’s surface, otherwise sensing material will be broken and lost

sensitivity.

2 .Following conditions must be avoided

2.1 Water Condensation

Indoor conditions, slight water condensation will influence sensors’ performance lightly.

However, if water condensation stay on sensing material surface and keep a certain

period, sensors’ sensitive will decrease.

2.2 Used in high gas concentration

No matter the sensor is electrified or not, if it is placed in high gas concentration for long

time, sensors characteristic will be affected. If lighter gas sprays the sensor, it will cause

extremely damage.

2.3 Long time storage

The sensors resistance will drift reversibly if the module is stored for long time without

electrify, this drift is related with storage conditions. Modules should be stored in airproof

bag without volatile silicon compound. For the modules with long time storage but no

electrify, they need long galvanical aging time for stability before using. The suggested

aging time as follow: