Introducing the APX1-C1/C1Z Online pH/ORP Controller
In modern water treatment and industrial process control, the continuous and accurate measurement of pH and ORP (Oxidation-Reduction Potential) is essential for protecting equipment, ensuring product quality, and meeting environmental compliance. The APX1-C1/C1Z Online pH/ORP Controller has been developed to meet exactly this demand: a compact yet powerful instrument engineered for the continuous monitoring of the pH or ORP value of aqueous solutions in a wide variety of industries.
The APX1 platform combines a large 3.2-inch graphic LCD display, dual relay control, an isolated current output, and optional RS485 MODBUS-RTU communication inside a rugged IP66 panel-mount housing. Whether it is deployed in a municipal wastewater plant, a chemical dosing system, or an aquaculture facility, the controller delivers dependable, real-time readings that operators can trust.
Key Specifications at a Glance
| Parameter |
Specification |
| Display Range |
pH: 0~14 pH; ORP: -2000 mV~2000 mV; Temp.: -10~+150 ℃ |
| Resolution |
pH: 0.01 pH; ORP: 1 mV; Temp.: 0.1 ℃ |
| Accuracy |
±0.02 pH / ±2 mV |
| Temperature Compensation |
NTC10K / PT1000, automatic or manual |
| Relay Control |
2 channels, SPST, 3A 250V AC |
| Current Output |
1 channel, active 4~20 mA or 0~20 mA, max. load 1000Ω |
| Communication |
RS485 MODBUS-RTU (APX1-C1Z only) |
| Display Screen |
3.2-inch graphic LCD |
| Protection Grade |
IP66 |
| Power Supply |
100~240 VAC or 18~36 VDC, 3W max. |
Built for Continuous Duty
- Wide measurement range: pH from 0 to 14 and ORP from -2000 mV to 2000 mV cover virtually every industrial water application.
- High precision: a resolution of 0.01 pH and an accuracy of ±0.02 pH ensure that even small process changes are detected.
- Flexible control: two SPST relays can be configured for main value control, temperature control, or wash control, with high/low alarm logic.
- Reliable memory: power-failure protection keeps configuration parameters retained indefinitely, so setup is never lost.
With a 100 x 100 x 120 mm panel-mount body weighing only about 500 g, the APX1-C1/C1Z is easy to integrate into existing panels while offering the robustness demanded by industrial environments. It is the ideal choice for engineers who value accuracy, reliability, and simplicity in one instrument.
Designed Around the Operator
Day-to-day operation has been kept deliberately simple. A bright 3.2-inch graphic LCD presents the measured value clearly, and a straightforward menu system, entered by a long press of the enter button, gives access to probe settings, alarm settings, current output, and communication configuration. Calibration of pH glass or antimony probes and of ORP probes follows a guided, step-by-step routine, so both experienced technicians and new operators can complete the task quickly and correctly.
Why Choose the APX1 Platform
Choosing the right online controller is about more than a data sheet. It is about trusting the reading, minimising maintenance, and ensuring the instrument still performs years after installation. The APX1-C1/C1Z earns that trust through verified measurement performance, robust IP66 construction, dependable relay and current outputs, and the option of digital communication. For distributors and system integrators, it represents a single, flexible platform that can serve customers across many different applications, reducing stock complexity while meeting a broad range of technical requirements.
The APX1-C1/C1Z Online pH/ORP Controller is now available. For detailed technical documentation, ordering information, and application support, please contact our team.
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