Winsen ZPH02 Qir-Quality and Particles Sensor User Manual

Winsen ZPH02 Qir-Quality and Particles Sensor

Statement

• This manual copyright belongs to 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
• 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

• This module integrates mature VOC detection technology and advanced PM2.5 detection technology to detect VOC and PM2.5 at the same time. The VOC sensor in this module has high sensitivity to formaldehyde, benzene, carbon monoxide, ammonia, hydrogen, alcohol, cigarette smoke, essence and other organic vapors.PM2.5 detection adopts particle counting principle to detect the particles (diameter ≥1μm).
• Before delivery, the sensor has been aged, debugged, calibrated and has good consistency and high sensitivity. It has the PWM signal output, and it can be configured to be UART digital serial interface and customized IIC interface.

Features

• 2 in 1
• High Sensitivity
• Good Consistency
• Good Stability for long time
• Interface output is multiple E asy to install and use

Applications

• Air Purifier
• Air Refresher Portable meter
• HVAC System
• A C System
• Smoke Alarm System

Technical Parameters

Output

| UART(9600, 1Hz±1%)
PWM(period: 1Hz±1%)

Detection Ability

| ****

VOC

| Formaldehyde(CH2O), benzene(C6H6), carbon monoxide(CO), hydrogen(H2), ammonia(NH3),alcohol(C2H5OH),

cigarette smoke, essence &etc.

Detection ability

for particle

| 1 μm
Warm-up time| ≤5min
Working Current| ≤150mA
Humidity range| Storage| ≤90%RH
Working| ≤90%RH
Temperature

range

| Storage| -20℃～50℃
Working| 0℃～50℃
Size| 59.5×44.5×17mm（LxWxH）
Physical interface| EH2.54-5P terminal socket

Structure

Detection Principle

Pins Definition

PIN1| Control pin(MOD)|
---|---|---
PIN2| Output OUT2/RXD
PIN3| Power positive (VCC)
PIN4| Output OUT1/TXD
PIN5| GND

Instructions

1. PIN1: it is control pin.
   • The sensor is in PWM mode if this pin is hanging in air
   • The sensor is in UART mode if this pin is connecting to GND.
2. PIN2: In UART mode, it is RDX; In PWM mode, it is PWM signal with 1Hz. The output is PM2.5 concentration.
3. PIN4: In UART mode, it is TDX; In PWM mode, it is PWM signal with 1Hz. The output is VOC level.
4. Heater: the heater is built-in and the heating makes air rise, causing the air outside flow into sensor inside.
5. What kind of particles can be detected: diamete ≥1μm, such as smoke, house dust, mold, pollen and spores.

PM2.5 output wave in PWM mode

NOTE

1. LT is the pulse width of low level in one period( 5 500Ms
2. UT is the pulse width of one period 1s )).
3. Low pulse rate RT: RT=LT/ UT x100% range 0.5%~50%

VOC output wave in PWM mode

NOTE

1. LT is the pulse width of low level in one period( n*1 00Ms
2. UT is the pulse width of one period 1s )).
3. Low pulse rate RT: RT=LT/ UT x100% , four grades, 10% progressive increase 10%~40% RT is higher, the pollution is more series.

The relationship between low pulse rate of output and particles

concentration

NOTE
People usually use different grades best, good, bad, worst to describe the air quality condition Recommend the standard as follow:

• Best 0.00% – 4.00%
• Good 4.00% – 8.00%
• bad 8.00% – 12.00%
• Worst 12.00%

Sensitivity curve of VOC sensor

NOTE:

• The air quality classified into 4 grades: best, good, bad, worst.
• The module is calibrated and the output of 0x00-0x03 means from best air-quality level to worst air-quality level. VOC includes a lot of gases and the grades is a reference for customer to judge the air quality.

Communication protocol

General Settings

Commnucation command
Module sends the concentration value every other one second.Only send,no receive.Command as follow: Table 4.

type name code

| Unit (Low pulse rate)| Integer part

of low pulse rate

| Decimals part

of low pulse rate

| Reservation| Mode| VOC

grade

| Check value
0XFF| 0X18| 0X00| 0x00-0x63| 0x00-0x63| 0x00| 0x01| 0x01-0x

04

| 0x00-0x

FF

 |  |  |  |  |  |  |  |

PM2.5 calculation:

• Byte3 0x12, byte4 0x13, so RT=18.19%
• The RT range in UART mode is 0.5%~50%.

VOC calculation:
Byte7 is VOC output. 0x01: best, …,0x04: worst. 0x00 means no sensor installed or malfunction.

Check and calculation

Cautions

1. Installation must be vertically.
2. Organic solvents(including sillica gel and other adhesive),paint,pharmaceutical,oil and high concentration of target gases should be avoided.
3. Artificial air steam such as fan should be farm away.For example,when it is used in air refresher,it can’t be installed in front or back of fan.Any side of fan shell can be installed on, but ventilation opening on the shell is necessary to guarantee gas from outside flow in.
4. Don’t use it the places where there is vapour such as bathroom,or near to air humidifier.
5. Dust sensor adopts optics working principle,so the light radiation will influence the sensor’s accuracy.We suggest users use sponge to cover the triangle hole in the middle of the sensor,avoiding light outside irradiate the sensor.Note that don’t cover the gas inlet and outlet.
6. Warmup time should lasts 5 min or longer for the first time usage and don’t apply it in the system involving people safety.
7. Moist will effect the normal functions of the module,so it should avoid.
8. Lens should be cleaned regularly according to the actual condition (about once per six months).Use one end of cotton swab with clean water to scrub the lens,and use the other end to wipe dry.Don’t use organic solvent such as alcohol as cleanser.

DIMENSION

CONTACT

• Tel: 86-371-67169097/67169670
• Fax: 86-371-60932988
• Email: [email protected]

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