Palintest Micro 800 Waterproof pH/Conductivity/TDS Meter

Overview

The Palintest Micro 800 Waterproof pH/Conductivity/TDS Meter is a field-deployable, multi-parameter electrochemical analyzer engineered for precision, ruggedness, and regulatory traceability in demanding environmental, industrial, and municipal water quality applications. Based on potentiometric measurement principles for pH and ORP, and four-electrode AC conductivity sensing for robust compensation of polarization effects and electrode fouling, the Micro 800 delivers high reproducibility across variable sample matrices—from raw surface water and wastewater effluents to purified process streams and disinfection by-product monitoring points. Its IP67-rated enclosure ensures uninterrupted operation under rain, splashing, dust ingress, or temporary submersion—critical for compliance with ASTM D1129 (Standard Terminology Relating to Water), ISO 7888 (Electrical conductivity of water), and USP (Water Conductivity). Designed for both laboratory benchtop verification and real-time field deployment, it supports GLP-compliant data integrity through timestamped storage, audit-ready calibration logs, and dual-interface connectivity.

Key Features

• Triple-parameter capability: Simultaneous, independent measurement of pH, conductivity, and TDS—with integrated temperature sensing and automatic temperature compensation (ATC) across −10.0 to 110.0 °C.
• High-fidelity electrochemical architecture: Dual-junction pH electrode design minimizes liquid junction potential drift; graphite-based conductivity cell enables stable, low-maintenance performance in high-solids or chlorinated environments.
• Flexible calibration protocols: Supports up to six-point pH calibration using NIST-traceable or US-standard buffers (pH 1.68, 4.01, 6.86, 7.00, 9.18, 10.01, 12.45); one-point per conductivity range (e.g., 74 µS/cm, 1412 µS/cm, 12.88 mS/cm) with manual or auto-ranging selection.
• Ruggedized hardware: IP67-rated polycarbonate housing; drop-tested to 1 m; operating ambient range 0–50 °C; powered by two standard AA alkaline cells with >100 hours of continuous use and programmable auto-off (17 min idle).
• Regulatory-ready data handling: Stores 500 full-measurement records with date/time stamp, parameter values, temperature, electrode ID (if encoded), and calibration status—exportable via USB or RS-232 for LIMS integration or FDA 21 CFR Part 11–aligned review workflows.

Sample Compatibility & Compliance

The Micro 800 is validated for aqueous samples including drinking water, groundwater, surface water, wastewater, swimming pool water, cooling tower fluids, boiler feedwater, and hydroponic nutrient solutions. It accommodates turbid, low-ionic-strength, and mildly oxidizing matrices without signal saturation or electrode poisoning. All factory calibrations are performed against certified reference materials traceable to NPL (UK) and NIST (USA). The instrument meets IEC 61000-4-2 (ESD immunity), IEC 61000-4-3 (radiated RF immunity), and conforms to EN 61326-1 for electromagnetic compatibility in laboratory and industrial environments. Optional accessories—including PT 1330 pH/Temp combination electrodes, PT 1340 dual-range conductivity/TDS cells, and certified calibration standards (e.g., PT 142 series at 74 µS/cm, 1412 µS/cm, 12.88 mS/cm)—support ISO/IEC 17025 method validation and routine QC verification.

Software & Data Management

Data export is supported natively via ASCII-formatted CSV files over USB virtual COM port or physical RS-232 interface—compatible with Excel, LabChart, and custom SCADA or LIMS platforms. No proprietary software installation is required. Each stored record includes: measurement timestamp, pH value, mV offset (for diagnostic trending), conductivity (µS/cm or mS/cm), TDS (mg/L or g/L), temperature (°C), selected calibration point(s), and battery status. Audit trails preserve all calibration events—including date, buffer used, slope/mV/pH deviation, and user-entered notes—enabling full traceability per GLP and GMP documentation requirements. Firmware updates are delivered via downloadable HEX files with checksum verification.

Applications

• Drinking water utilities: Routine compliance monitoring per WHO Guidelines and EU Directive 98/83/EC for pH stability, conductivity (as proxy for total dissolved solids), and temperature-dependent correction.
• Wastewater treatment plants: Influent/effluent characterization, activated sludge process control, and disinfection residual correlation studies.
• Environmental field surveys: Rapid assessment of acid mine drainage (low-pH/high-conductivity), agricultural runoff (high-TDS), and wetland biogeochemical profiling.
• Pharmaceutical manufacturing: USP Stage 1 and Stage 2 conductivity testing of purified water and water-for-injection (WFI) at point-of-use locations.
• Food & beverage QA/QC: Monitoring rinse water conductivity in CIP systems, brine concentration in pickling tanks, and pH drift in fermentation vessels.

FAQ

Does the Micro 800 support automatic temperature compensation for all parameters?
Yes—ATC is applied continuously to pH, conductivity, and TDS measurements across the full sensor temperature range (−10.0 to 110.0 °C), using either built-in thermistor or external probe input.
Can calibration data be exported separately from measurement records?
Yes—calibration logs are embedded within each measurement file and can also be extracted as discrete audit reports via serial command protocol.
Is the instrument compatible with FDA 21 CFR Part 11 requirements?
While the Micro 800 itself does not provide electronic signatures, its immutable timestamped data logs, calibration history, and export integrity meet foundational ALCOA+ principles; full Part 11 compliance is achieved when integrated with validated third-party data management software.
What is the recommended recalibration frequency for field use?
Daily calibration is advised for critical applications; weekly verification suffices for stable, low-risk matrices—per ISO 5725-2 guidance on intermediate precision control.
Are replacement electrodes supplied with calibration certificates?
All Palintest-certified electrodes (PT 1330, PT 1340) ship with individual CoA referencing NIST-traceable calibration at 25 °C, including slope, offset, and response time metrics.