IoT product and technology solution provider
Products
Home /

Water Quality Sensors

/

RS485

/RS485 Modbus pH Sensor | Industrial Water Quality Monitoring Probe IP68

Digital pH sensor
Digital pH sensor Digital pH sensor Digital pH sensor Digital pH sensor Digital pH sensor Digital pH sensor Digital pH sensor

RS485 Modbus pH Sensor | Industrial Water Quality Monitoring Probe IP68

Here’s a polished, professional, and SEO-friendly enriched version for your product description:

This product is specially designed for environmental water quality monitoring, the detection of acid, alkali and salt solutions, real-time tracking of chemical reaction processes, and precise monitoring of **industrial production procedures. It delivers stable and reliable performance, enabling accurate online pH measurement to meet the demanding requirements of most industrial applications. With its high adaptability and durability, it effectively supports process control, quality assurance, and environmental compliance across a wide range of industrial scenarios.


  • Model No.:

    LW102D-PH(RS485)

  • Use:

    Water PH monitoring

  • Power Supply:

    Battery or External DC

  • LoRaWAN Mode:

    OTAA Class A/C

  • Shell Material:

    Stainless Steel

  • Certificates:

    CE,ROHS,FCC,ISO and 11 patents certifications

  • Customized Support:

    OEM, ODM

  • Warranty:

    1 Year
Inquire now
  • Product Detail

RS485 Modbus pH Sensor | Industrial Water Quality Monitoring Probe IP68



Product Features:

  • Widely used in environmental water quality monitoring, acid/alkali/salt solution testing, chemical reaction processes, and industrial production processes, ideal for online pH measurement in most industrial applications.
  • Signal output: RS-485 (Modbus/RTU protocol).
  • Easy to integrate with third-party devices including PLCs, DCS, industrial computers, general controllers, paperless recorders, and touch screens.


  • Equipped with a dual high-impedance differential amplifier for strong anti-interference performance and fast response.
  • Patented pH probe with internal reference solution that bleeds slowly through a microporous salt bridge under 100 kPa (1 Bar) pressure, providing stable performance for over 20 months; electrode life is twice as long as traditional industrial electrodes.
  • Simple installation with 3/4 NPT thread, suitable for submersion, pipeline, or tank installation.
  • Protection class: IP68.


PH Sensor Specification:

Model

ZW-PH-PR

Measuring range

0～14pH

Resolution

0.01pH

Accuracy

±0.1pH，±0.3℃

Working temperature

0～50℃

Working pressure

≤0.2MPa

Temperature compensation

Auto temperature compensation(PT1000)

Power supply

12～24VDC

Signal output

RS-485(Modbus/RTU)

Wetted material

ABS/PC alloy

Mounting method

Submerged installation, 3/4 NPT thread

Cable length

5 meters, other lengths can be customized

Calibration

Two-point calibration

Power consumption

0.2W@12V

Protection grade

IP68


Packaging:

Single gross weight: 1.200 KG

Single package size: 37X26X5 cm



Product Description: 


Customer on-site examples: 


Application: 

  1. RS485 pH sensors are widely used in fields such as aquaculture, environmental monitoring, agricultural irrigation, and sewage treatment.
  2. With stable RS485 (Modbus/RTU) output and strong anti-interference performance, they are particularly suitable for long-term online industrial monitoring, automated systems, and scenarios requiring stable data transmission to PLC, DCS, or industrial control systems.
  3. They enable remote, real-time, and continuous monitoring of water pH values, supporting intelligent management and timely early warning.


applications of versatile Residual Chlorine Sensor


Certifications：

As a professional water quality pH sensor manufacturer & exporter in China with over 10 years of experience, we specialize in RS485 pH sensors for industrial online monitoring.Our pH sensors are fully compliant with CE & RoHS certifications, ensuring reliable quality and stable performance for global customers.




Production Process:


factory of water ec sensor manufacturer



Why choose us:

1. Strong R & D: 30+ Senior experts and highly educated personnel formed a R & D team, heavy investment, master a number of core technologies and patents.
2. Professional and effective solutions: for smart environmental protection, agriculture and other fields, to provide customized compound networking solutions.
3. Full range of products: covering the whole industry chain products from data collection to platform services to meet diverse needs.
4. Excellent quality: we have perfect quality control system, strictly quality control each production link, low defective rate. 
5. Good service: 7×24 hours fast response, Professional pre-sale, sale, after-sales team support.

Want to know about this product?

SEND A MESSAGE
Get A Free Quote

If you are interested in our products and want to know more details, please leave a message here, we will reply you as soon as we can.

Related Products
ZONEWU Total Hardness Sensor RS485/ 4-20 mA Total Hardness Sensor for Water Quality Monitoring
ZW-TH-PR split-type online total hardness sensor uses patented PVC film Ca-Mg ion electrodes to measure water total hardness (as CaCO3) with 0~1000.0mg/L range and 0.1mg/L resolution, ±10% reading accuracy. Equipped with Pt1000 automatic temperature compensation, T90<60s, IP68 protection and 3/4NPT multi-installation mode. It supports RS485/ModbusRTU (optional 4-20mA) output, low power consumption, easy connection to PLC/DCS, and two-point calibration. The stable reference system extends electrode life, ideal for industrial water quality monitoring.
Read More
ZONEWU Multi-Parameter Water Quality Sensor Professional Self-Cleaning RS485/Modbus Multi-Parameter Water Quality Sensor
This professional self-cleaning RS485/Modbus multi-parameter water quality sensor features an integrated industrial-grade design. It supports simultaneous measurement of 8 water quality parameters (e.g., DO, COD, pH) with customizable configurations. Equipped with an automatic cleaning system, it effectively prevents microbial adhesion and cuts maintenance costs significantly. Adopting RS485 bus and Modbus/RTU protocol, it transmits data directly to collection platforms. With IP68 waterproof rating, POM+316L materials and easy submersible installation, it enables long-term accurate online monitoring for various water quality scenarios.
Read More
EC water quality sensor High Precision RS485 EC Water Quality Transmitter | 4–20mA Optional
This product is suitable for drinking water, various water supply systems and recirculating aquaculture water. It adopts RS-485 (Modbus RTU protocol) signal output, which can be easily connected with PLC, DCS, industrial control computers, general controllers, paperless recorders, touch screens and other third-party equipment. It adopts 3/4 NPT thread design for submerged installation, which is convenient for installation in pipelines, water tanks and other occasions, with IP68 protection level, and can output conductivity and TDS at the same time.
Read More
ZONEWU DO Sensor High Precision RS485 Output Water Quality DO Dissolved Oxygen Sensor
The ZW-DO-PR is a high-precision dissolved oxygen (DO) sensor designed for industrial water quality monitoring. Utilizing the reliable fluorescence method, it delivers accurate measurements from 0 to 20.00 mg/L (0–200% saturation at 25°C) with ±2% accuracy and automatic temperature compensation (Pt1000). Featuring RS485 (Modbus RTU) output, this submersible sensor is built with durable POM, ABS, PC alloy, and 316L stainless steel, ensuring IP68 protection for reliable operation in harsh environments. With a response time of
Read More
ZONEWU ORP Water Quality Sensor Industrial Grade Online ORP Water Quality Sensor - IP68 Waterproof, RS485 Output
ZW-ORP-PR industrial-grade online ORP water quality sensor is specially designed for industrial scenarios. It has a measurement range of -1500～+1500mV and an accuracy of ±20mV. It supports RS485 (Modbus/RTU) communication and can seamlessly connect to industrial control equipment such as PLC and DCS. The product is equipped with a patented ORP electrode, whose service life is twice that of conventional electrodes. It has an IP68 high protection rating and a 3/4 NPT thread design, which is suitable for various installation methods. With strong anti-interference ability and fast response, it is widely used in online ORP detection in scenarios such as environmental water quality monitoring, chemical reactions, and industrial production.
Read More
OEM RS485 residual chlorine sensor Industrial RS485 Residual Chlorine Sensor, No Reagent Low Maintenance
This product is specially designed for the continuous online monitoring of residual chlorine in aqueous solutions. It is widely applied in drinking water treatment plants, canning factories, water distribution networks, swimming pools, cooling circulating water systems, and various water treatment projects, ensuring stable and reliable water quality detection.
Read More
Multi Parameter Water Quality Sensor LoRaWAN Integral Multi Parameter Water Quality Sensor
The company's newly launched online LoRaWAN multi-parameter self-cleaning digital sensor features an integrated design for reliable and user-friendly operation. Capable of simultaneously measuring up to eight parameters including dissolved oxygen, COD, pH, ORP, conductivity/salinity, ammonia nitrogen, and turbidity, this device employs LoRaWAN wireless technology compliant with standard protocols. Data can be directly transmitted to the collection platform.
Read More
LoRaWAN noise sensor with long range transmission ZONEWU LoRaWAN IoT noise monitoring sensor
ZONEWU LoRaWAN noise sensor is a high-precision sound level meter with a wide measurement range of 30dB to 130dB, perfectly catering to diverse daily noise monitoring needs. Boasting the inherent advantages of LoRaWAN technology—long-distance transmission, low power consumption and stable data connectivity—it is widely deployed across multiple scenarios, including home environment monitoring, office acoustic management, workshop noise control, automotive noise testing, and industrial on-site measurement.
Read More
Subscribe to Our Newsletter
Sign up for our company lastest news!
IoT product and technology solution provider. We focus on manufacturing high-quality sensors, including water quality sensors, gas sensors, Internet of Things (IoT) sensors, and smart agriculture sensors.
contact us
Copyright © 2013-2026 Xiamen ZoneWu Technology Co., LTD.. All Rights Reserved.
IPv6 network supported
Power by
Get A Free Quote
Get A Free Quote
If you are interested in our products and want to know more details, please leave a message here, we will reply you as soon as we can.
Refresh the image

Home

Products

about

contact