Hach HQ14d Digital Conductivity Analyzer
| Brand | Hach |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Origin Category | Imported |
| Model | HQ14d |
| Instrument Type | Benchtop |
| Parameter Capability | Multi-parameter |
| Power Supply | 4 × AA batteries (＞200 h operation) or AC/DC adapter |
| Display Language | English, French, German, Italian, Spanish |
| Data Storage Capacity | 500 measurement records |
| Memory Function | Automatic logging in “Read-on-Demand” and interval modes |
| Temperature Compensation Modes | Off / Automatic / Manual |
| Display Lock | Supported in both continuous and read-on-demand modes |
| Ingress Protection Rating | IP67 (submersible to 1 m for 30 min) |
| Electrode Compatibility | Hach IntelliCAL™ conductivity electrodes only |
| Password Protection | Yes (for setup, time/date configuration, and data integrity control) |
Overview
The Hach HQ14d Digital Conductivity Analyzer is a benchtop electrochemical instrument engineered for precision, reliability, and operational simplicity in routine water quality and process monitoring applications. Built upon Hach’s IntelliCAL™ electrode platform, the HQ14d employs conductometric measurement principles—based on the electrical conductance of aqueous solutions—to determine ionic concentration, total dissolved solids (TDS), and salinity with high reproducibility. Its modular architecture decouples sensor intelligence from the base unit: all calibration coefficients, serial identification, and electrode-specific temperature compensation parameters are stored directly within the IntelliCAL™ conductivity probe, eliminating manual entry errors and ensuring traceable, electrode-specific metrology. Designed for laboratories, municipal water facilities, and industrial QC environments, the HQ14d delivers robust performance under variable ambient conditions while maintaining full compliance with standard analytical workflows governed by EPA Method 120.1, ASTM D1125, and ISO 7888.
Key Features
- IntelliCAL™ Electrode Integration: Auto-recognition and plug-and-play compatibility with all Hach-certified conductivity electrodes—including CDC401 (0.01–200 mS/cm), LIC101 (low-conductivity, 0.001–200 µS/cm), and CDC101 (general-purpose, 0.1–200 mS/cm)—ensuring consistent calibration traceability.
- IP67-Rated Enclosure: Fully sealed housing certified to withstand immersion at 1 meter depth for 30 minutes, enabling safe operation in humid labs, field-deployed mobile labs, or wet industrial environments.
- Dual-Power Flexibility: Operates on four AA alkaline batteries (rated for >200 hours of typical use) or via optional AC/DC adapter—ideal for uninterrupted long-term monitoring or portable deployment.
- Multi-Language Interface: On-screen menus and prompts available in English, French, German, Italian, and Spanish—supporting multinational laboratory operations and GLP-compliant training documentation.
- Password-Protected Configuration: Three-tier access control (operator, supervisor, administrator) secures critical functions including date/time settings, calibration history modification, and memory reset—aligning with FDA 21 CFR Part 11 requirements for audit-ready data integrity.
- Intuitive Navigation: Context-sensitive soft keys and real-time status icons guide users through calibration, measurement, and data review without requiring reference manuals.
Sample Compatibility & Compliance
The HQ14d is validated for use with aqueous samples across potable water, wastewater, boiler feedwater, cooling tower fluids, and pharmaceutical process streams. It supports standardized conductivity measurements per USP , EP 2.2.38, and JP 2.05, with automatic temperature compensation (ATC) referencing either built-in NTC thermistors (in IntelliCAL probes) or user-entered reference temperatures. All stored data—including timestamps, electrode ID, calibration points, and raw conductance values—are retained in non-volatile memory with immutable log entries. The instrument meets IEC 61000-4 electromagnetic compatibility standards and carries CE, UKCA, and RoHS certifications. For regulated environments, its password-protected audit trail satisfies basic GLP/GMP data governance expectations, though full 21 CFR Part 11 compliance requires integration with Hach’s Laboratory Information Management System (LIMS) or compatible third-party software platforms.
Software & Data Management
Data generated by the HQ14d is stored locally in a chronological, timestamped sequence (up to 500 records). Each entry includes measured conductivity (µS/cm or mS/cm), temperature (°C), electrode ID, calibration status, and measurement mode identifier (“Read-on-Demand”, “Interval”, or “Continuous”). Calibration logs retain slope, offset, cell constant, and date/time of each standardization event. While the HQ14d lacks native USB or Bluetooth connectivity, data export is supported via Hach’s optional HQD Series Docking Station (sold separately), which enables CSV file transfer to Windows-based PCs for further analysis in Excel, LIMS, or statistical process control (SPC) tools. Firmware updates are performed via micro-USB port using Hach’s free HQ Software Suite, which also provides report templates compliant with ISO/IEC 17025 documentation requirements.
Applications
- Drinking water treatment: Verification of deionization efficiency and post-treatment conductivity checks per WHO and EPA guidelines.
- Pharmaceutical water systems: Monitoring Purified Water (PW) and Water for Injection (WFI) conductivity against pharmacopeial limits during qualification and routine surveillance.
- Industrial boiler and steam cycle management: Detection of condensate contamination and feedwater purity assurance.
- Environmental monitoring labs: Field-to-lab continuity for surface water, groundwater, and effluent characterization.
- Educational laboratories: Teaching fundamental electrochemical concepts including Kohlrausch’s law, molar conductivity, and temperature dependence of electrolyte solutions.
FAQ
Which electrodes are compatible with the HQ14d?
Only Hach IntelliCAL™ conductivity electrodes—specifically the CDC401, LIC101, CDC101, and related variants certified for the HQD platform—are recognized and fully functional.
Does the HQ14d support automatic temperature compensation (ATC)?
Yes—three modes are available: Off, Automatic (using the integrated temperature sensor in the IntelliCAL probe), and Manual (user-input reference temperature).
Can measurement data be exported to a computer?
Yes—via the optional HQD Docking Station and Hach’s HQ Software Suite; direct USB cable connection alone does not enable data transfer.
Is the HQ14d suitable for use in hazardous locations?
No—the instrument is not intrinsically safe or ATEX/IECEx certified; it is intended for general laboratory and non-classified industrial areas.
How is calibration traceability maintained?
Each IntelliCAL electrode stores its unique calibration history, cell constant, and manufacturing ID; this information is automatically read and logged by the HQ14d during every probe insertion.
