APT12 Panel-Mount pH/ORP Transmitter and Controller
The ARTang APT12 is a compact panel-mount pH/ORP controller for continuous measurement, local display and high/low limit control.
It supports 4–20 mA output and relay control for water treatment, chemical dosing, packaged equipment and industrial process applications. Depending on the selected electrode, it measures 0.00~14.00 pH or −1000 to +1000 mV ORP.
- pH measurement range: 0.00~14.00 pH
- ORP measurement range: −1000 to +1000 mV
- 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 APT12 pH/ORP controller is a compact industrial instrument for local display, 4–20 mA output, and basic high/low relay control.
In pH mode, it works with a combination pH electrode and measures 0.00~14.00 pH with three-point calibration (pH 4.00, 6.86, 9.18). In ORP mode, it uses a compatible electrode and measures −1000 to +1000 mV.
The 4–20 mA output transmits data to PLCs or recorders, while relay outputs support alarm or simple on/off control.
With a 96 × 96 mm panel design, 92 × 92 mm cutout, and 24 VDC power supply, it is suitable for OEM systems, control panels, and replacement applications.
Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Product model |
APT12 |
|
Product type |
Panel-mount pH/ORP transmitter and controller |
|
pH measurement range |
0.00~14.00 pH |
|
ORP measurement range |
−1000 to +1000 mV |
|
Temperature compensation |
Manual temperature compensation |
|
Measured-medium temperature |
0~100°C, subject to the connected electrode |
|
pH calibration |
Three-point calibration: pH 4.00, 6.86 and 9.18 |
|
Display |
3½-digit segment LCD |
|
Output |
4–20 mA，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
pH or ORP Measurement
Selectable pH or ORP mode for different process needs.
4–20 mA Output and Relay Outputs
Standard 4–20 mA signal for PLC integration, with high/low relay outputs for alarm and basic on/off control.
Three-Point pH Calibration
Uses pH 4.00, 6.86 and 9.18 buffer solutions.
Manual Temperature Compensation
Allows manual adjustment based on process temperature.
Compact Panel Design
96 × 96 mm housing with 92 × 92 mm panel cutout.
24 VDC Power Supply
Easy integration into PLC panels and packaged equipment using standard industrial DC power.
Typical Applications
Water and Wastewater Treatment
- Municipal water pH monitoring
- Wastewater neutralization
- Effluent pH control
- Chemical dosing systems
Acid and Alkali Dosing
- Acid/alkali dosing control
- Neutralization and batch tanks
- pH adjustment systems
- Alarm or interlock control
ORP Monitoring
- Disinfection and chlorination control
- Dechlorination and ozone systems
- Oxidation-reduction monitoring
Industrial Process Water
- Cooling water monitoring
- Process and rinse water control
- Utility water systems
OEM Equipment
- Dosing skids
- Water treatment panels
- Filtration systems
- OEM control cabinets
Calibration
Use clean, uncontaminated pH 4.00, 6.86 and 9.18 buffer solutions.
Rinse the electrode between buffers and follow the calibration sequence in the operating manual.
FAQ
Simultaneous dual-channel measurement is not specified in the supplied technical data.
The APT12 should be treated as a single-channel instrument configured for either pH or ORP measurement according to the connected electrode.
The controller and electrode should be specified separately unless the quotation clearly states that they are supplied as a complete set.
Electrode selection depends on the liquid, temperature, pressure, contamination, mounting method, cable length and chemical compatibility.
No automatic temperature compensation is specified.
The APT12 uses manual temperature compensation. The operator must enter or adjust the process temperature used for pH electrode-slope compensation.
The supplied specification lists three-point calibration with:
- pH 4.00
- pH 6.86
- pH 9.18
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.
CNC Machining Equipment
Product Assembly
CNC Machining
Welding Process
warehouse
Technical Support Department
Certified Quality
Product certificates and quality control systems support reliable industrial measurement applications.
CE
ISO
3-A
NEPSI
Exhibition Experience
ARTang meets customers and distributors at industry exhibitions to better understand project needs and market requirements.
