Target: pH water
Model: ZW03
Detection principle: Electrochemical
Characteristics: Low power consumption,high accuracy ,linear output, easy calibration and excellent stability.
Size: 40×25mm

ZW03 Manual download
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The ZW03 pH water quality sensor module is a universal module that uses electrochemical principles to detect the H + content in water, with good selectivity and stability.Using the digital signal output, very easy to use.ZW03 is designed and manufactured with mature electrochemical detection technology closely combined with sophisticated circuit design. 


It is widely used for water quality pH detection in laboratory research, water plant water supply, waste-water treatment, aquaculture, farmland irrigation and other fields.


Low power consumption,high accuracy ,linear output, easy calibration and excellent stability.


Items Parameter
Working voltage 12V(DC)
Consumption <25mW
Temperature range 0-50℃
Output mode RS485(5V)
Output linearity Linear
Response time ≤180S
Detection Temperature range 0-50℃

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.