WTW pH/ION 3310 Portable Multi-Parameter Water Quality Analyzer
| Origin | Imported |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Measured Parameters | pH, mV, ISE (Ion-Selective Electrode), Temperature |
| Calibration Options | 2–7 point ISE calibration, non-linear ISE applications |
| Display | Backlit LCD |
| Enclosure Rating | IP67 |
| Power Supply | 4 × AA alkaline or 4 × NiMH rechargeable batteries |
| Data Storage | Manual (200 entries) or automatic (5,000 entries), configurable logging interval |
| Compliance | GLP-compliant data handling, audit-ready timestamped records |
| Connectivity | Waterproof USB interface |
| CMC (Continuous Measurement Control) | Real-time calibration and measurement integrity monitoring |
| Operating Temperature Range | –5.0 to +105.0 °C (±0.1 °C accuracy) |
| pH Range | –2.000 to +19.999 (±0.005 pH accuracy) |
| mV Range | –2500 to +2500 mV (±1 mV accuracy) |
| ISE Range | 0.000–9.999 / 10.00–99.99 / 100.0–999.9 / 1000–999999 (unit-dependent |
Overview
The WTW pH/ION 3310 is a professional-grade, handheld multi-parameter water quality analyzer engineered for field-deployable precision in environmental monitoring, wastewater treatment, drinking water verification, and aquaculture management. Built upon the proven ProfiLine architecture of the 3310 series, it integrates high-fidelity potentiometric measurement principles—including Nernstian response modeling for pH and ion-selective electrode (ISE) quantification—into a single robust platform. Unlike simplified consumer-grade meters, the pH/ION 3310 applies rigorous electrochemical signal conditioning, temperature-compensated slope calculation, and drift-corrected analog-to-digital conversion to ensure metrological traceability across diverse aqueous matrices. Its design adheres to fundamental requirements of ISO 5667 (water sampling), ASTM D1293 (pH of water), and ISO 7888 (electrical conductivity), supporting methodologically defensible data generation under GLP and routine QA/QC protocols.
Key Features
- True multi-parameter capability: Simultaneous pH, redox (mV), ISE, and temperature measurement with independent sensor input channels
- Advanced ISE functionality: Supports 2–7 point calibration with user-defined non-linear regression (e.g., for fluoride, nitrate, ammonium, potassium, calcium, sodium, chloride, cyanide, and other ions using certified WTW ISEs)
- IP67-rated housing: Fully dust-tight and submersible up to 1 m for 30 minutes—validated per IEC 60529—enabling reliable operation in rain, humid soil, or splashed industrial environments
- Backlit high-contrast LCD: 128 × 64 pixel monochrome display with adjustable brightness for legibility under low-light field conditions or direct sunlight
- GLP-compliant data management: Each stored record includes date/time stamp, electrode ID, calibration history, temperature, operator ID (optional), and measurement uncertainty flags
- CMC (Continuous Measurement Control): Real-time validation of electrode stability, slope deviation, and offset drift during measurement—alerts users before invalid readings are recorded
- Flexible power architecture: Operates on standard AA alkaline cells (up to 1,000 h battery life without backlight) or rechargeable NiMH packs (up to 150 h with backlight enabled)
- Waterproof USB 2.0 interface: Enables direct cable connection to Windows/macOS systems without external adapters; supports bulk export of .csv and .txt files compatible with LIMS and Excel-based reporting
Sample Compatibility & Compliance
The pH/ION 3310 is validated for use with natural waters (rivers, lakes, groundwater), treated effluents, potable supplies, brackish estuaries, and process streams with total dissolved solids (TDS) up to 199.9 g/L. It accepts all WTW-certified combination pH/ISE electrodes, double-junction reference electrodes, and solid-contact ISE probes—eliminating junction clogging in high-sulfide or viscous samples. All firmware and calibration routines comply with FDA 21 CFR Part 11 requirements for electronic records when used with WTW LabX software (optional). Device firmware is qualified per IEC 61326-1 for electromagnetic compatibility in industrial environments and meets RoHS 3 and REACH substance restrictions. Calibration certificates for factory-traceable standards (NIST-traceable pH buffers, ISE standard solutions) are available upon request for audit readiness.
Software & Data Management
Data acquisition and post-processing are supported via WTW’s free PC software, LabX Light, which provides automated report generation, statistical trend analysis (e.g., moving averages, min/max tracking), and customizable export templates aligned with ISO/IEC 17025 documentation frameworks. The instrument stores up to 5,000 auto-logged measurements with programmable intervals (1 s to 24 h), enabling unattended profiling of diurnal pH shifts or seasonal ion concentration trends. All memory entries are write-protected after saving and include digital signatures verifying time-of-capture integrity. Audit trails—recorded per GLP Annex 11—log every calibration event, parameter change, and firmware update with user ID and timestamp.
Applications
- Regulatory compliance monitoring for EPA Method 150.1 (pH), 300.0 (ISE), and 120.1 (conductivity)
- Field verification of drinking water per WHO Guidelines and EU Drinking Water Directive (98/83/EC)
- Wastewater influent/effluent characterization in municipal and industrial plants
- Aquaculture health management: real-time NH₄⁺, NO₃⁻, and Cl⁻ monitoring to prevent toxicity events
- Environmental impact assessments: baseline and post-intervention water chemistry profiling
- Educational laboratories: teaching electrochemical fundamentals, calibration theory, and uncertainty propagation in analytical chemistry
FAQ
Does the pH/ION 3310 support automatic temperature compensation (ATC) for all measured parameters?
Yes—ATC is applied continuously to pH, ISE, and conductivity readings using either integrated Pt1000 sensor input or external probe; manual temperature entry is also supported.
Can I use third-party ISE electrodes with this instrument?
Only WTW-certified ISEs are guaranteed for full functionality, including slope validation, CMC integration, and non-linear calibration curves. Non-WTW electrodes may yield unstable readings or fail CMC diagnostics.
Is firmware upgrade capability included?
Yes—field-upgradable firmware is delivered via USB and maintains backward compatibility with existing calibration files and data structures.
What is the maximum permissible salinity for accurate ISE measurements?
For optimal selectivity and minimal interference, ISE measurements are recommended below 35 g/L TDS; higher salinities require matrix-matched calibration and interference correction factors per ISO 10304-1.
How does CMC improve measurement reliability compared to conventional meters?
CMC continuously evaluates electrode impedance, asymmetry potential, and Nernst slope deviation against stored reference profiles—halting data capture if deviations exceed ±5% from calibrated baseline, thereby preventing erroneous compliance reports.
