Winson WSP2110 VOC Gas Sensor User Manual

Winson WSP2110 VOC Gas Sensor

Statement

This manual copyright belongs Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not be responsible for the loss. The specific such as color, appearance, sizes &etc, please in kind prevail. We are devoting ourselves to products development and technical innovation, so we reserve the right to improve the products without notice. Please confirm it is the valid version before using this manual. At the same time, users’ comments on optimized using way are welcome. Please keep the manual properly, in order to get help if you have questions during the usage in the future.

Profile

WSP2110 VOC gas sensor adopts multilayer thick film manufacturing technology. The heater and metal oxide semiconductor material on the ceramic substrate of subminiature Al2O3 are fetched out by electrode down-lead, encapsulated in metal socket and cap. Conductivity of the sensor is affected by the concentration of target gas. The higher the concentration is, the higher conductivity of sensor gets. Users can adopt simple circuit to convert variation of conductivity into output signal corresponding to gas concentration.

Features

High sensitivity to organic gases such as toluene, benzene, methanal; quick response and recovery; low power consumption, simple detection circuit, good stability and long life.
Main Application
It is used in automatic exhaust device, air cleaner in domestic occasion for harmful gas detection.

Technical Parameters Stable1

alcohol, acetone &etc.

Detection range| 1～50ppm
Standard circuit| Loop voltage| VC| ≤24V DC
Heating voltage| VH| 5.0V±0.1V AC or DC
Load resistance| RL| Adjustable
sensor features in standard test condition| Heating resistance| RH| 90Ω±10Ω(Room Tem.)
Heating consumption| PH| ≤300mW
Surface resistance| RS| 10KΩ～100KΩ(in 10ppm toluene)
Sensitivity| S| Rs(in air)/Rs(in 10ppm toluene）≥3
Concentration slope| α| ≤0.6(R50ppm/R5ppm toluene)
Standard condition of test| Temperature, humidity| 20℃±2℃；65%±5%RH
**** Standard test circuit| VC:5.0V±0.1V；

VH :5.0V±0.1V

Warm-up time| Not less than 120 hours

Basic Circuit

Instructions: The above fig is the basic test circuit of WSP2110.The sensor requires two voltage inputs: heater voltage (VH) and circuit voltage (VC). VH is used to supply standard working temperature to the sensor and it can adopt DC or AC power, while VRL is the voltage of load resistance RL which is in series with sensor. Vc supplies the detect voltage to load resistance RL and it should adopt DC power.

Description of Sensor Characters

• Rs means resistance in target gas with different concentration, R0means resistance of sensor in clean air. All tests are finished under standard test conditions
• Rs means resistance of sensor in 10ppm toluene under different tem. and humidity. Rso means resistance of the sensor in clean air under 20℃/65%RH.

NOTE: Test is finished in standard test conditions, the abscissa is observing time and the ordinate is VRL.

Cautions

Following conditions must be prohibited

1. Exposed to volatilizable organic silicon steam
   Sensing material will lose sensitivity and never recover if the sensor absorbs organic silicon steam. Sensors must be avoided exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon environment.

2. High Corrosive gas
   If the sensors are exposed to high concentration corrosive gas (such as H2 S, SOX , Cl2, HCl etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation.

3. Alkali, Alkali metals salt, halogen pollution
   The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine.

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

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

6. Applied higher voltage
   Applied voltage on sensor should not be higher than stipulated value, even if the sensor is not physically damaged or broken, it causes down-line or heater damaged, and bring on sensors’ sensitivity characteristic changed badly.

7. Voltage on wrong pins
   As Fig8, Pin 1&2 connects to heater circuit, Pin 3&4 connects to measuring circuit; Under the requested conditions, heating and measuring can use the same power circuit.

NOTE: the two pins near the protuberance mark is heating electrode.

Following conditions should be avoided

1. Water Condensation
   Indoor conditions, slight water condensation will influence sensors’ performance lightly. However, if water condensation on sensors surface and keep a certain period, sensors’ sensitive will be decreased.

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.

3. Long time storage
   The sensors resistance will drift reversibly if it’s stored for long time without electrify, this drift is related with storage conditions. Sensors should be stored in airproof bag without volatile silicon compound. For the sensors with long time storage but no electrify, they need long galvanical aging time for stability before using. The suggested aging time as follow: Storage Time| Suggested aging time
   ---|---
   Less than one month| No less than 48 hours
   1 ~ 6 months| No less than 72 hours
   More than six months| No less than 168 hours

4. Long time exposed to adverse environment
   No matter the sensors electrified or not, if exposed to adverse environment for long time, such as high humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly.

5. Vibration
   Continual vibration will result in sensors down-lead response then break. In transportation or assembling line, pneumatic screwdriver/ultrasonic welding machine can lead this vibration.

6. Concussion
   If sensors meet strong concussion, it may lead its lead wire disconnected.

7. Usage Conditions
   For sensor, handmade welding is optimal way. The welding conditions as follow:

   • Soldering flux: Rosin soldering flux contains least chlorine
   • homothermal soldering iron
   • Temperature: ≤350℃
   • Time: less than 3 seconds

If disobey the above using terms, sensors sensitivity will reduce.

Zhengzhou Winsen Electronics Technology Co., Ltd
Add: No.299, Jinsuo Road, National Hi-Tech Zone,
Zhengzhou 450001 China
Tel: +86-371-67169097/67169670
Fax: +86-371-60932988
E-mail: sales@winsensor.com
Website: www.winsen-sensor.com

References

• Winsen Gas Sensor_CO2 Sensor_Air Quality Sensor_Dust Sensor_CO Sensor-Winsen Electronics
• Winsen Gas Sensor_CO2 Sensor_Air Quality Sensor_Dust Sensor_CO Sensor-Winsen Electronics

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