Apure A10PR-A Industrial Online pH/ORP Controller
| Brand | Apure |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | A10PR-A |
| Measurement Range | pH 0.00–14.00 |
| ORP | −1999 to +1999 mV |
| Resolution | 0.01 pH / 1 mV |
| Accuracy | ±0.01 pH / ±1 mV |
| Temperature Compensation | 0–100 °C (manual, PT1000, or NTC10K) |
| Dimensions | 96 × 96 × 132 mm (H × W × D) |
| Power Supply | AC 220 V or DC 24 V |
| Power Consumption | ≤5 W |
| Environmental Operating Range | 0–60 °C, ≤85% RH |
| Output | Dual isolated 4–20 mA outputs (configurable for pH/ORP and temperature) |
| Relay Outputs | Two programmable SPST relays (3 A / 250 V AC, NO contact), adjustable hysteresis |
| Stability | ≤0.02 pH/24 h |
| Mounting Cutout | 92.5 × 92.5 mm |
Overview
The Apure A10PR-A Industrial Online pH/ORP Controller is a DIN-rail mountable, panel-integrated process analyzer engineered for continuous, high-stability measurement of hydrogen ion activity (pH) and oxidation-reduction potential (ORP) in demanding industrial fluid streams. Based on potentiometric electrochemical sensing principles, the controller interfaces with standard glass-body pH electrodes and redox (platinum or gold) ORP sensors to deliver real-time, calibrated analog and relay-based process feedback. Its dual-channel capability enables simultaneous acquisition and independent configuration of pH/ORP and temperature signals—critical for compensating electrode response drift and ensuring traceable measurement integrity across variable thermal conditions. Designed for 24/7 operation in municipal, pharmaceutical, power generation, and chemical processing environments, the A10PR-A complies with fundamental functional safety expectations for non-intrinsically safe process instrumentation operating under IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emission) standards.
Key Features
- Dual isolated 4–20 mA analog outputs—individually assignable to pH, ORP, or temperature values, with galvanic isolation up to 1500 VAC for noise rejection in electrically noisy plant environments
- Two fully configurable SPST relays (3 A / 250 V AC, normally open), supporting high/low alarm, dosing control, or pump interlock logic with user-defined hysteresis to prevent chattering under marginal setpoint conditions
- Flexible temperature compensation architecture supporting manual entry, PT1000 RTD input, or NTC10K thermistor—enabling accurate Nernstian correction across 0–100 °C without external transmitters
- Bilingual menu-driven interface (English/Chinese) with context-sensitive prompts and hierarchical password protection (three access levels) to safeguard calibration, output scaling, and relay logic parameters
- Robust DIN 96×96 mm front-panel housing (IP65-rated when properly gasketed), optimized for panel cutouts of 92.5×92.5 mm and rear terminal accessibility
- Long-term signal stability validated at ≤0.02 pH/24 h and ≤3 mV/24 h—meeting baseline performance requirements for GLP-aligned continuous monitoring in regulated water treatment and bioprocessing applications
Sample Compatibility & Compliance
The A10PR-A is compatible with all industry-standard pH and ORP sensing elements compliant with ISO 17025 traceable calibration protocols—including double-junction refillable electrodes, gel-filled maintenance-free probes, and industrial-grade ORP sensors with platinum or gold sensing tips. It supports direct connection to differential or single-ended reference electrode configurations and accommodates common electrolyte fill solutions (e.g., KCl 3 mol/L, Ag/AgCl internal reference). While not certified to SIL or ATEX standards, its electrical design adheres to IEC 61010-1 for measurement/control equipment used in industrial locations. For FDA-regulated environments (e.g., purified water systems per USP ), the device may be deployed as part of a validated system when integrated with audit-trail-capable SCADA or DCS platforms that enforce 21 CFR Part 11 electronic record controls.
Software & Data Management
The A10PR-A operates autonomously without embedded firmware-based data logging; however, its dual 4–20 mA outputs are fully compatible with distributed control systems (DCS), programmable logic controllers (PLCs), and historian platforms supporting HART, Modbus RTU, or analog I/O integration. All configuration parameters—including calibration offsets, relay thresholds, temperature compensation mode, and unit display preferences—are retained in non-volatile memory during power loss. Calibration history (date/time-stamped zero and span points) must be manually recorded per facility SOPs, as the unit does not generate internal electronic audit trails. For laboratories requiring full ALCOA+ compliance, pairing with a validated data acquisition system (e.g., DeltaV, Ignition SCADA) is recommended to satisfy data integrity, retention, and review requirements under ISO/IEC 17025 or GMP Annex 11.
Applications
- Municipal and industrial wastewater treatment—continuous pH monitoring in equalization tanks, neutralization basins, and effluent discharge points
- Power plant boiler feedwater and condensate polishing loops—ORP-based hydrazine or oxygen scavenger dosing control
- Pharmaceutical purified water (PW) and water-for-injection (WFI) distribution systems—compliance support for USP conductivity/pH correlation checks
- Chemical manufacturing reaction vessels and scrubber effluents—real-time acid/base titration endpoint detection and corrosion mitigation
- Food and beverage CIP (clean-in-place) validation—pH shift verification during alkaline and acidic rinse cycles
- Electroplating bath management—ORP monitoring for chromium reduction, nickel passivation, and cyanide destruction processes
FAQ
Does the A10PR-A support automatic temperature compensation with third-party PT100 sensors?
Yes—it accepts standard two-wire or three-wire PT1000 RTD inputs (IEC 60751 Class B) and NTC10K thermistors. PT100 sensors require external signal conditioning to match the 1000 Ω nominal resistance at 0 °C.
Can the 4–20 mA outputs be scaled independently for pH and temperature?
Yes—each output channel is fully configurable: Output 1 may be assigned to pH (e.g., 4 mA = 0.00 pH, 20 mA = 14.00 pH), while Output 2 can be assigned to temperature (e.g., 4 mA = 0 °C, 20 mA = 100 °C).
Is firmware upgrade capability available via USB or Ethernet?
No—the A10PR-A uses fixed-function embedded firmware with no field-upgrade path. Functional updates require hardware revision per Apure’s product lifecycle documentation.
What is the maximum cable length between the controller and pH electrode?
For optimal noise immunity and signal fidelity, Apure recommends ≤15 meters of shielded twisted-pair cable (e.g., Belden 8761) with proper grounding at the controller end only.
Does the unit meet NEMA 4X or IP66 enclosure ratings?
The front panel meets IP65 when installed with supplied gasket and bezel; the rear electronics compartment is rated IP20. Optional NEMA 4X-rated enclosures are available separately for outdoor or washdown installations.
