Palintest Micro 600 TDS Meter

Overview

The Palintest Micro 600 TDS Meter is a precision-engineered portable conductometric instrument designed for reliable total dissolved solids (TDS) quantification in field and laboratory environments. Based on the fundamental principle of electrical conductivity measurement—wherein ionic concentration in aqueous solutions correlates linearly with conductance—the Micro 600 converts measured conductivity values into TDS equivalents using user-selectable conversion factors (0.40–1.00) and programmable cell constants (K = 0.1, 1.0, or 10.0 cm⁻¹). Engineered for operational robustness across diverse water matrices—from ultrapure process water (≤1 µS/cm) to brackish and seawater (up to ~100 mS/cm)—the device employs automatic temperature compensation (ATC) referenced to standardized temperatures (20.0–25.0 °C), ensuring metrological consistency under variable ambient conditions. Its compact form factor (140 × 70 × 35 mm), low power consumption (<100 µA typical), and sealed electronics architecture make it suitable for extended deployment in environmental monitoring, aquaculture, HVAC water treatment, and municipal utility field operations.

Key Features

• Three-tier TDS range configuration: 0–9.99 mg/L, 10.0–99.9 mg/L, 100–999 mg/L, 1.00–9.99 g/L, and 0–99.9 g/L—with optional extension to 199.9 g/L via range selection
• High-resolution display supporting dual-unit readability: mg/L and g/L, with selectable resolution steps (0.01 / 0.1 / 1)
• Programmable temperature coefficient (0.0–2.0 %/°C) and manual/automatic temperature compensation (0–80 °C)
• Five-point manual calibration capability per measurement range, enabling traceable adjustment against certified reference standards
• Dedicated electrode constant selection (K = 0.1, 1.0, 10.0 cm⁻¹) optimized for low-, medium-, or high-conductivity samples
• Integrated temperature sensor with ±0.5 °C accuracy (0–100.0 °C, 0.1 °C resolution) and independent readout functionality
• Auto-power-off after 17 minutes of inactivity, conserving battery life without compromising data integrity

Sample Compatibility & Compliance

The Micro 600 is validated for use with aqueous samples exhibiting conductivity from 100 mS/cm (concentrated saline solutions). It complies with ISO 7888:2019 (water quality — determination of electrical conductivity) and supports adherence to ASTM D1125-22 (Standard Test Methods for Electrical Conductivity and Resistivity of Water). While not intrinsically rated for hazardous locations, its IP65-rated enclosure provides protection against dust ingress and low-pressure water jets—suitable for outdoor sampling in rain or humid environments. The instrument supports GLP-compliant workflows through documented calibration records (user-maintained), repeatable electrode conditioning protocols, and stable baseline drift performance (<±0.3 % FS over 8 h at 25 °C). No firmware-based audit trail or electronic signature functionality is included; therefore, manual logbook entries are recommended for regulated applications requiring 21 CFR Part 11 alignment.

Software & Data Management

The Micro 600 operates as a standalone electrochemical measurement platform with no embedded Bluetooth, USB, or cloud connectivity. All configuration parameters—including TDS conversion factor, temperature coefficient, cell constant, and calibration point values—are retained in non-volatile memory following battery replacement. Data output is limited to real-time on-screen display only; no internal storage or export capability is provided. Users must manually record measurements alongside environmental metadata (e.g., sample ID, time, temperature, electrode lot number) to satisfy documentation requirements for ISO/IEC 17025-accredited laboratories. Compatible calibration standards (e.g., Palintest PT 142/8: 3000 mg/L NaCl, PT 142/9: 300 mg/L NaCl, PT 142/10: 50 mg/L NaCl) are traceable to NIST SRM 3194 and supplied with CoA documentation.

Applications

• Field verification of reverse osmosis (RO) and deionization (DI) system performance in pharmaceutical water systems (PW/WFI pre-checks)
• Routine monitoring of boiler feedwater, cooling tower make-up, and condensate return lines in industrial facilities
• Ecological assessment of freshwater bodies, estuaries, and groundwater wells for salinity-driven habitat classification
• Quality control of bottled water, beverage concentrates, and hydroponic nutrient solutions
• Educational laboratory instruction on ionic strength, colligative properties, and conductivity–TDS correlation models

FAQ

What electrode types are compatible with the Micro 600?

The instrument accepts Palintest PT 142-series TDS electrodes, including the standard PT 142/1 (K = 1.0 cm⁻¹) and optional high-range variants. Electrodes feature platinum black plating and integrated Pt1000 temperature sensors.
Can the Micro 600 measure conductivity directly, or only TDS?

It displays conductivity-derived TDS exclusively. Raw conductivity values (µS/cm or mS/cm) are not shown; however, users may infer approximate conductivity using the selected K-value and displayed TDS with standard conversion tables.
Is multi-point calibration supported across all ranges simultaneously?

No. Calibration is range-specific: up to five points may be stored per active range setting, but recalibration is required when switching between mg/L and g/L modes or changing cell constants.
How often should the electrode be cleaned and recalibrated?

Daily cleaning with deionized water and mild detergent is recommended for routine use; full recalibration is advised before each sampling session or after exposure to fouling agents (e.g., algae, scale, organic films).
Does the device meet CE or UKCA marking requirements?

Yes. The Micro 600 carries CE marking per EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU. UKCA marking applies to units placed on the GB market post-2023, with identical technical compliance.