CS1728D Digital pH Sensor

Short Description:

Designed for Hydrofluoric acid environment. HF concentration < 1000ppm Digital pH Sensor is an online analytical device for continuous measurement of hydrogen ion activity (pH) in water. It features a rugged combination electrode with a low‑impedance glass membrane and an integrated reference electrode. The sensor directly outputs digital data via RS‑485 (Modbus RTU) with automatic temperature compensation (ATC) for accurate readings across a wide pH range (0–14). It is built with a durable, waterproof (IP68) body and features long‑term stability, fast response, and low maintenance. Typical applications include wastewater treatment, drinking water monitoring, industrial process control, aquaculture, and chemical processing. The digital design enables plug‑and‑play connectivity, remote calibration, and seamless integration into SCADA or IoT monitoring platforms. By providing continuous, reliable pH data, the sensor helps optimize chemical dosing (acid/alkali), ensure regulatory compliance, and maintain optimal conditions for biological and chemical processes. Unlike traditional analog pH sensors, the digital version eliminates signal interference and cable length limitations, making it an essential, cost‑effective tool for unattended, real‑time water quality monitoring.
Easy to connect to PLC, DCS, industrial control computers, general purpose controllers, paperless recording instruments or touch screens and other third party devices.

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Introduction:

The electrode is made of ultra-bottom impedance-sensitive glass film, and it also has the characteristics of fast response, accurate measurement, good stability, and not easy to hydrolyze in the case of hydrofluoric acid environment media. The reference electrode system is a non-porous, solid, non-exchange reference system. Completely avoid various problems caused by the exchange and blockage of the liquid junction,such as the reference electrode is easy to be polluted, reference vulcanization poisoning, reference loss and other problems.

Product advantages:

•Double salt bridge design, double layer seepage interface, resistant to medium reverse seepage

•The ceramic pore parameter electrode oozes out of the interface and is not easy to be blocked, which is suitable for monitoring of hydrofluoric acid environmental media.

•High-strength glass bulb design, the glass appearance is stronger.

•The electrode adopts low noise cable, the signal output is farther and more stable

•Large sensing bulbs increase the ability to sense hydrogen ions, and perform well in hydrofluoric acid environment media.

Technical parameters:

Model No.	CS1728D
Power/Outlet	9~36VDC/RS485 MODBUS RTU
Measure material	Glass/silver+ silver chloride
Housing material	PP
Waterproof grade	IP68
Measurement range	0-14pH
Accuracy	±0.05pH
Pressure resistance	≤0.6Mpa
Temperature compensation	NTC10K
Temperature range	0-80℃
Calibration	Sample calibration, standard liquid calibration
Connection methods	4 core cable
Cable length	Standard 10m cable, can be extended to 100m
Installation thread	NPT3/4’’
Application	Hydrofluoric acid ≤ 1000ppm water