APT15 High-Accuracy Panel-Mount pH/ORP Controller

The ARTang APT15 is a high-accuracy panel-mount controller for continuous pH or ORP measurement, local indication and high/low limit control.

Compared with a basic pH controller, the APT15 provides higher controller accuracy, a wider ORP measurement range and both automatic and manual pH temperature compensation.

It can transmit the measured value to a PLC or recorder through a 4–20 mA output, while high- and low-limit relays support alarm, interlock and basic on/off dosing control.

  • pH measurement range: 0.00~14.00 pH
  • ORP measurement range: −2000 to +2000 mV
  • Automatic or manual temperature compensation
  • 4–20 mA analog output
  • High- and low-limit relay outputs
  • 24 VDC power supply
  • 96 × 96 mm panel-mount housing
  • 92 × 92 mm panel cutout

    Product Description

    The APT15 pH/ORP controller is designed for industrial applications that require higher measurement accuracy, temperature compensation, local display, and process-control outputs in a compact instrument.

    The APT15 is widely used in water treatment systems, chemical dosing skids, industrial process control, and OEM analytical panels where stable measurement, signal transmission, and basic control functions are required in a 96 × 96 mm panel-mount format.

    Technical Specifications

    Parameter

    Specification

    Product model

    APT15

    Product type

    High-accuracy panel-mount pH/ORP transmitter and controller

    Measurement mode

    pH or ORP, depending on electrode and configuration

    pH measurement range

    0.00~14.00 pH

    ORP measurement range

    −2000 to +2000 mV

    Controller accuracy – pH

    ±0.01 pH

    Controller accuracy – ORP

    ±1 mV

    pH temperature compensation

    Automatic or manual

    pH calibration

    Three-point calibration: pH 4.00, 6.86 and 9.18

    Analog output

    4–20 mA

    Control output

    High- and low-limit relay outputs

    Power supply

    24 VDC

    Housing dimensions

    96 × 96 × 46 mm

    Required panel cutout

    92 × 92 mm

    Mounting method

    Panel mount

    Key Features

    Panel-mount pH controller with ±0.01 pH measurement accuracy
    Compact panel-mount pH controller with 96 × 96 mm housing

    High-Accuracy pH Measurement

    The APT15 provides a specified controller accuracy of ±0.01 pH over a measurement range of 0.00–14.00 pH.

    Wide ORP Measurement Range

    The ORP measurement range extends from −2000 to +2000 mV with a specified controller accuracy of ±1 mV

    Automatic or Manual Temperature Compensation

    Three-Point pH Calibration

    4–20 mA Analog Output

    High- and Low-Limit Relay Outputs

    Compact Panel-Mount Design

    The controller uses a 96 × 96 × 46 mm housing and requires a 92 × 92 mm panel opening.Suitable for compact analytical panels, dosing skids and OEM control cabinets.

    Typical Applications

    Water and Wastewater Treatment

    • Municipal water-treatment systems
    • Municipal and industrial wastewater treatment
    • Neutralization tanks
    • Effluent pH monitoring
    • Water-reuse systems
    • Coagulation and chemical-dosing processes
    • Packaged water-treatment equipment

    Acid and Alkali Dosing

    • Acid dosing
    • Alkali dosing
    • Neutralization control
    • pH adjustment skids
    • Batch treatment tanks
    • Chemical-treatment equipment
    • Industrial wastewater pH control

    ORP Monitoring and Redox Control

    • Oxidation process monitoring
    • Reduction process monitoring
    • Chlorination control
    • Dechlorination systems
    • Ozone-treatment systems
    • Chemical oxidation processes
    • Selected metal-treatment and electroplating processes

    Industrial Process Water

    • Cooling-water treatment
    • Circulating-water systems
    • Process-water monitoring
    • Industrial rinse water
    • Water-treatment chemical control
    • Water-reuse equipment
    • Industrial utility water

    OEM Equipment and Analytical Panels

    The 96 × 96 mm panel design is suitable for integration into:

    • Chemical-dosing skids
    • Water-quality monitoring panels
    • Packaged wastewater-treatment equipment
    • Filtration and pretreatment systems
    • Industrial control cabinets
    • OEM pH/ORP monitoring systems

    FAQ

    Can the APT15 measure pH and ORP simultaneously?

    The APT15 should be treated as a single-channel controller configured for either pH or ORP according to the connected electrode. Confirm the required measurement mode when ordering.

    What is the main difference between the APT15 and APT12?

    The APT15 provides:

    • Higher pH controller accuracy
    • Higher ORP controller accuracy
    • A wider ORP measurement range
    • Automatic and manual temperature compensation
    • A larger display

    The APT12 is intended for more general-purpose applications where manual temperature compensation and standard accuracy are sufficient.

    Is the pH or ORP electrode included with the controller?

    The electrode is not automatically included unless the quotation states that the product is supplied as a complete measurement set.

    ARTang can supply or recommend a compatible electrode according to the application.

    What panel opening is required?

    The APT15 requires a 92 × 92 mm panel opening.

    The controller dimensions are 96 × 96 × 46 mm. Reserve sufficient space behind the panel for wiring and terminal access.

    Request a Quote and Electrode Selection Support

    Need the APT15 controller only or a complete pH/ORP measurement system?

    Send us your measured liquid, pH or ORP range, process temperature, required temperature compensation, installation method, output requirements and electrode information.

    ARTang will help confirm the controller and compatible electrode before quotation.

    Factory Strength & Quality Assurance

    ARTang supports industrial measurement projects with in-house production, strict calibration, certified quality control, and global exhibition experience.

    Factory Production

    In-house production and assembly for stable product quality and reliable delivery.

    Worker operating production equipment for instruments and meters

    CNC Machining Equipment

    ARTang worker operating production instruments and equipment

    Product Assembly

    CNC Machining

    Welding Process

    artang warehouse

    warehouse

    Technical Support Department

    Certified Quality

    Product certificates and quality control systems support reliable industrial measurement applications.

    CE certificate for electromagnetic flowmeter

    CE

    ISO 9001 quality management system certificate

    ISO

    3-A sanitary certificate for electromagnetic flowmeter

    3-A

    NEPSI explosion protection certificate for integral magnetic flowmeter

    NEPSI

    Exhibition Experience

    ARTang meets customers and distributors at industry exhibitions to better understand project needs and market requirements.

    ARTang at an industrial instrumentation exhibition, showcasing flow meters and pressure transmitters for process automation applications