Apure A10CD Online Conductivity and Resistivity Analyzer
| Brand | Apure |
|---|---|
| Model | A10CD-A / A10CD-S |
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Measurement Range | 0.05 µS/cm – 200 mS/cm |
| Resistivity Range | 0.00 – 20.00 MΩ·cm |
| Temperature Range | 0–60 °C |
| Resolution | 0.01 µS/cm |
| Output | Dual isolated 4–20 mA (conductivity/resistivity & temperature) |
| Relay Outputs | 2 programmable SPDT relays (3 A / 250 V AC, NO contact) |
| Power Supply | AC 220 V or DC 24 V |
| Power Consumption | ≤5 W |
| Enclosure Dimensions | 96 × 96 × 132 mm (H × W × D) |
| Panel Cutout | 92.5 × 92.5 mm |
| Temperature Compensation | Automatic (PT1000 or NTC10K) or Manual |
| Display Language | Switchable between Chinese and English |
| Environmental Rating | 0–60 °C ambient, ≤85% RH non-condensing |
Overview
The Apure A10CD Online Conductivity and Resistivity Analyzer is an industrial-grade, panel-mounted process instrument engineered for continuous, high-stability measurement of aqueous solution conductivity and resistivity in real time. Based on two-electrode or four-electrode conductometric principles—configurable per application requirements—the A10CD delivers precise, drift-resistant readings across a wide dynamic range spanning ultra-pure water (up to 20.00 MΩ·cm) to highly conductive industrial effluents (up to 200 mS/cm). Its dual-range capability eliminates the need for manual range switching, enabling seamless operation across diverse process environments—from semiconductor ultrapure water loops and pharmaceutical water-for-injection (WFI) distribution systems to municipal wastewater treatment and chemical dosing control. The analyzer incorporates built-in temperature compensation algorithms compliant with ASTM D1125 and ISO 7888 standards, supporting PT1000 platinum resistance thermometers, NTC10K thermistors, or user-defined manual offset—ensuring metrological traceability under variable thermal conditions.
Key Features
- Dual isolated 4–20 mA analog outputs: One channel assigned to conductivity/resistivity value, the other to temperature—both galvanically isolated to suppress ground-loop interference and electromagnetic noise common in industrial PLC/DCS environments.
- Two fully configurable SPDT relay outputs: Programmable as high/low alarms or control setpoints with adjustable hysteresis (0.1–100% of full scale), preventing chattering during threshold transitions in fluctuating processes.
- Multi-language operator interface: Factory-default Chinese display with one-touch toggle to English—designed for multinational engineering teams and global commissioning support.
- Robust security architecture: Password-protected parameter configuration (three-tier access: operator, engineer, administrator) aligned with IEC 62443-3-3 guidelines for industrial control system integrity.
- Intuitive menu navigation with contextual prompts: On-screen guidance reduces training time and minimizes misconfiguration risk during routine calibration or maintenance.
- Wide operating ambient specification: Rated for continuous use at 0–60 °C and ≤85% relative humidity (non-condensing), suitable for indoor control panels and sheltered outdoor enclosures meeting IP65 front-panel rating.
Sample Compatibility & Compliance
The A10CD is designed for direct in-line or immersion-style measurement of aqueous solutions in closed-loop industrial piping systems. It supports standard conductivity cells with cell constants from 0.01 cm⁻¹ (for ultrapure water) to 10.0 cm⁻¹ (for brines and aggressive electrolytes), ensuring compatibility with third-party sensors conforming to DIN EN 27888 and USP <645>. The instrument meets CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. Its analog output isolation and relay contact ratings comply with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) standards. While not inherently 21 CFR Part 11 compliant, audit-trail-ready data logging can be achieved when integrated with validated SCADA or MES platforms supporting electronic signature and change-control workflows.
Software & Data Management
The A10CD operates autonomously without embedded firmware-based data storage; instead, it functions as a deterministic field device optimized for integration into higher-level automation infrastructures. All configuration parameters—including calibration coefficients, temperature compensation mode, relay logic states, and output scaling—are retained in non-volatile memory and survive power interruption. Configuration is performed locally via the front-panel keypad and LCD, with no proprietary software required. For centralized monitoring, the dual 4–20 mA outputs interface directly with PLC analog input modules (e.g., Siemens S7-1200 AI, Rockwell CompactLogix 1769-IF4), while relay status signals feed discrete input cards. Optional HART-enabled transmitters may be added externally for digital diagnostics and remote parameter adjustment where legacy analog infrastructure remains in place.
Applications
- Municipal water treatment: Continuous monitoring of influent conductivity for coagulant dosing optimization and effluent quality verification prior to discharge.
- Power plant condensate polishing: Detection of low-level ionic contamination in steam cycle water to prevent turbine corrosion and extend resin bed life.
- Pharmaceutical purified water (PW) and WFI systems: Compliance with USP <645> and EP 2.2.38 conductivity limits across temperature-corrected zones.
- Chemical manufacturing: Real-time tracking of reaction mixture ionic strength during batch synthesis or continuous neutralization processes.
- Food & beverage CIP validation: Verification of rinse water conductivity to confirm removal of caustic or acidic cleaning agents before product contact.
- Electroplating bath management: Monitoring of electrolyte concentration stability to maintain consistent deposit thickness and surface morphology.
FAQ
What temperature sensors are supported for automatic compensation?
The A10CD accepts PT1000 RTDs (IEC 60751 Class B) and NTC10K thermistors (B25/50 = 3950 K), both connected via shielded twisted-pair wiring. Manual temperature offset (±99.9 °C) is also available for fixed-point reference applications.
Can the 4–20 mA outputs be re-ranged independently?
Yes—each output channel supports full-scale customization: e.g., 4–20 mA can represent 0.00–20.00 MΩ·cm on Channel 1 and 0–60.0 °C on Channel 2, with linear or square-root scaling options.
Is the unit suitable for hazardous area installation?
No—the A10CD is rated for general-purpose use only (non-explosion-proof). For Zone 1/21 installations, it must be housed in an approved purge or pressurization enclosure meeting IEC 60079-13 requirements.
How often does the instrument require calibration?
Calibration interval depends on application severity; typical recommendation is quarterly for critical pharmaceutical water systems and semi-annually for municipal wastewater. Two-point calibration (low and high standard) is supported using NIST-traceable KCl solutions.
Does the device support Modbus RTU or other digital protocols?
Not natively—the A10CD is analog-native. However, third-party protocol converters (e.g., Modbus RTU to 4–20 mA isolators) enable integration into Modbus networks without compromising signal integrity.
