RS-485 pH Probe AT-SB-PROBE-pH-P

Datasheet

1. Introduction

SENSBLUE pH POM AT-SB-PROBE-pH-P sensor is used in environmental water quality monitoring, acid/alkali/salt solutions, chemical reaction processes, and industrial production processes. It can meet the requirements of online pH measurement for most industrial applications.

2. Features

• Signal output: RS-485 (Modbus/RTU protocol).
• Convenient connection to third-party equipment such as PLCs, DCS, industrial control computers, general controllers, paperless recorders, or touch screens.
• Double high-impedance differential amplifier with strong anti-interference capability and fast response.
• The pH probe’s internal reference solution oozes very slowly from the microporous salt bridge under a pressure of at least 100 kPa (1 bar), and its forward bleed continues for more than 20 months. Such a reference system is very stable, and the electrode life is extended by a factor of two compared to conventional industrial electrodes.
• Easy to install: 3/4 NPT pipe thread for easy submersible installation or installation in pipes and tanks.

3. Technical Specifications

Model	pH POM AT-SB-PROBE-pH-P
Measuring Range	0～14pH
Accuracy	±0.1pH
Resolution	0.01pH
Temperature Range	0 ~65℃
Work Pressure	＜0.2MPa
Temperature Compensation	automatic temperature compensation
Output	RS-485, MODBUS protocol
Power Supply	12～24VDC ±10%
Wetted Part Material	POM
Installation	Immersion mounting, 3/4 NPT thread
Cable Length	5 m, customizable
Calibration Method	Two-point calibration
Power Consumption	＜0.3W@12V
Ip Grade	IP68

4. Dimensions

The sensor connector is M16-5 core waterproof male connector.

5. Installation and Electrical Connection

5.1 Install

Note: The sensor must not be installed horizontally or upside down. It should be mounted at an inclination of at least 15° to ensure correct operation.

Pinouts
1 - Pin 12-24V DC	4 - RS485 B-
2 - GND	5 – NA
3 - RS485 A+	6 - NA
7 - NA