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pH/ORP Controller & Transmitter APX2-PD

Equipped with 2 independent measurement channel inputs, this advanced instrument simultaneously processes electrochemical sensor data and applies a built-in matrix to estimate residual chlorine up to 2.5 mg/L for swimming pools and water treatment facilities.

Measuring Parameter： pH 、ORP
Delivery time： 2-5 weeks
MOQ： 1
Price： Contact Us

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Overview
Specification
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Overview

Information

Display Range: pH: 0~14pH, ORP: ± 2000mV, Temp.: -10~150℃
Resolution: pH: 0.01pH, ORP: 1mV, TEMP: 0.1℃
Accuracy: 0.1% of the measuring range or ±0.02pH / ±2mV, take the larger one

Output/Communication

Relay Output: Two SPST relays, Max. load 3A/250VAC, set high/low alarm, temp. or clean control
Digital Output: A two-wire RS485 interface, Modbus RTU
Current Output: Two 0/4~20mA , Max. load 1000Ω, Support long-line calibration

Features

Clever Simplicity

An intuitive design featuring automatic recognition and true plug-and-play convenience for effortless operation.
Highest Flexibility

A versatile, modular configuration that allows easy scaling and seamless adaptation to diverse monitoring needs.
Long-Lasting Reliability

Robust, durable construction engineered to deliver reliable and stable performance across diverse and harsh environments.

Application

Engineered to deliver highly precise and rapid-response monitoring, our solutions feature an intuitive design for effortless operation and quick setup. It is widely applicable across diverse settings, from municipal wastewater treatment and industrial effluents to surface water, swimming pools, and commercial aquaculture in ponds or lakes, ensuring reliable data wherever you need it.

Applicable Scenarios

Water & Wastewater
Aquaculture
Energy & Power Generation
Food & Beverage
Agriculture & Hydroponics
Plating

Applicable Interfaces And Protocols

0/4~20mA
RS485, Modbus-RTU

Compatible with standard industrial protocols, ensuring easy and flexible system integration.

As a global manufacturer of water quality testing instruments, we have consistently focused on the R&D and production of analytical equipment. Guided by our core values of professionalism, responsibility, integrity, and innovation, we create value for our customers, serve the global market, and strive for mutually beneficial partnerships and shared growth.

Do your part for the environment—protect nature and embrace a green lifestyle with help from precision water-quality testing experts. Let us join hands to protect the Earth.

Optional Parts & Accessories

English
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Portuguese
Spanish

Model	APX2-PD
Principle	pH: Glass pH electrode (hydrogen ion concentration index) ORP: Platinum or gold electrodes (redox potential)
Measuring Objects	2 measurement channel inputs; pH or ORP can be selected arbitrarily
Display Range	pH: 0~14pH, ORP: ± 2000mV, Temp: -10~150℃
Resolution	pH: 0.01pH, ORP: 1mV, Temp: 0.1℃
Accuracy	0.1% of the measuring range or ±0.02pH / ±2mV, take the larger one
Stability	0.05% of measuring range every 24 hours without accumulation
Repeatability	Better than 0.1% of measuring range
Temp Compensation	Automatic or manual (NTC10K/PT1000 @customized)
Relay Output	Two SPST relays, Max. load 3A/250VAC, set high/low alarm, temp. or clean control
Digital Output	A two-wire RS485 interface, Modbus RTU
Current Output	Two 0/4~20mA, Max. load 1000Ω, supports long-line calibration
Electronic clock	Year/month/date, hour/minute/second
Historical Data	Historical data query and download, records the last 100 calibration maintenance data
Valuation Object*	Built-in matrix (equivalent to residual chlorine) 0~2.5mg/L Support user-defined (20x20 matrix) Linear correspondence (water sample stability)
Language	English
Display	128 x 64, 3.2-inch graphic dot matrix LCD
Calibration Method	pH: 3 points; ORP: 2 points, offset
Protection Grade	IP66
Enclosure Material	Enhanced ABS
Dimension	144mm x 144mm x 120mm (Hole size 138mm x 138mm)
Power Supply	AC: 100~240V 50/60Hz or DC:18~36V
Work Temperature	0~60℃, RH<95%, non-condensing
Storage Temperature	-20~70℃, RH<55%, non-condensing
Installation	Wall mounting, pipe clamp, panel mounting
Power Consumption	Max. 5W

pH/ORP Controller & Transmitter APX2-PD