Particles Sensor

（Model：ZPH03）

Manual

Version：1.1
Valid From：2020.08.15

Zhengzhou Winsen Electronics Technology Co., Ltd

 Statement

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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.

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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.

Zhengzhou Winsen Electronics Technology CO., LTD

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ZPH03 Particles Sensor

Profile
This sensor integrates infrared PM2.5 detection technology,
using particle counting principle to detect PM2.5 in the
environment. It can detect the particles (diameter ≥1μm).

Before delivery, the sensor has been aged, debugged,

calibrated with good consistency and high sensitivity.

Features
*Good Stability for Long Time *Low Consumption *Good Anti-interference Performance
*High Sensitivity *Good Consistency

Applications
*Air purifier *Air refresher *Portable Instrumentation
*HVAC system *Air conditioner *Domestic and Commercial AC

Technical Parameters

Model ZPH03
Working voltage range 5±0.2 V (DC)
Output mode UART、PWM
Output signal voltage 4.5±0.2 V
Detection ability Smallest particles 1 μm diameter
Detection Range 4 ~ 500ug/m
Warm-up time ≤10s
Working Current ≤30mA
Humidity Storage ≤95%RH
range Working ≤95%RH(No condensation)
Temperature Storage -30℃～60℃
range Working 0℃～50℃
Size 46.0×32.0×18.3mm（L×W×H）
Physical interface ZH1.5mm-4P Connector Socket

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Dimensions:

Fig 1

Detection Principle Introduction:

Fig 2

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Fig 3

Fig 3

Pins Definition

Pins Definition
PIN1 GND
PIN2 VCC
PIN3 RXD
PIN4 TXD/PWM

Fig 4 Connector Sketch

Remarks

The ZPH03's two mode settings can only be performed before the sensor is normally powered on.
Please make a hardware connection in advance.

In UART mode, Pin4 is serial port data transmitter

In PWM mode, Pin4 is output of PWM

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Application Circuit

1. PWM Mode Application Circuit

Fig 5

2. UART Mode Application Circuit

Fig 6

Remarks:
The sensor has two output modes: PWM or UART, which are set in factory.

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PWM Mode

In PWM mode, the sensor outputs PWM signal through PWM port (PIN 4). The PWM cycle is 1s,
and the dust concentration value is calculated according to the width of low level. The low pulse
width of PIN output corresponds to the average value of dust concentration. The value of
concentration was processed by software filtering, and the pulsation amplitude was relatively
small.

Fig7 PM2.5 Output Wave

Remarks：1. LT : the pulse width of low level in one period.(unit: ms)

2. UT : the pulse width of one period(unit: ms)
3. The low pulse rate: RT=LT/ UT × 100%
4. The relationship between LT and condensation: 1ms = 1ug/m³

UART Mode

In serial mode, the sensor outputs serial data through TXD pin (PIN 4), the concentration value will be send
every other one second
The general serial port settings are as follows:

Baud rate 9600

Interface level 4.5±0.2 V（TTL）
Data bits 8
Stop bits 1
Parity None

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Cautions

1.Terms of Use
1.1 Installation Sketch

Min Φ9.0

Vent Installation Board

3. Installation suggestions
2.1 the sensor should be installed in the air circulation position to avoid contact with organic
solvents;
2.2 recommended air velocity: (1.0 ~ 3) m / s; air volume: 0.004 ~ 0.01 CMM;
2.3 it is recommended to keep the sensor terminal downward;
2.4 it is recommended to add 3-5mm thick black breathable filter cotton at the air inlet side of the
sensor to prevent the accumulation of dust and other large particles;
2.5 it is recommended to keep away from high-frequency and high-voltage generator during
installation to prevent interference to the sensor;
2.6 it is recommended to install it at the backlight to prevent the sensor error from increasing due
to external light;
2.7 the sensor shell is conductive material and connected with circuit GND. GND pin should be
prevented from connecting into the system with voltage higher than the safety voltage of human
body, and it’s definitely it can’t be applied to the system involving human safety.

3.To avoid harmful interference

3.1 To avoid exposure to water vapor, away from the bathroom or air humidifier, the water mist
will bring PM2.5 data abnormal fluctuations; The sensor sensitivity will be reduced by splashing
water or immersed in water.

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3.2 To avoid strong electromagnetic interference, the sensor has certain anti-interference
performance, but it should still avoid strong electromagnetic environment. When using wireless
communication module (such as WiFi, Bluetooth, GPRS, etc.), it is necessary to keep a sufficient
distance from the sensor, and the specific safe distance shall be verified by the user.

4.Transport & storage

1. Avoid vibration：Frequent transport and assembly process, excessive vibration will lead to
optical device dislocation affect the original calibration data
2. Long-term storage：Sealed bags sealed to avoid contact with corrosive gas damage to circuit
boards and optics.

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

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