Hach MP Multiparameter Meter

Overview

The Hach MP Multiparameter Meter is a fully integrated, probe-free electrochemical analyzer engineered for rapid, reliable field and plant-floor measurement of critical water quality parameters—including pH, oxidation-reduction potential (ORP), conductivity, total dissolved solids (TDS), resistivity, salinity, and temperature. Unlike conventional handheld meters requiring external electrodes or cables, the MP Meter incorporates an integrated, self-contained sample chamber with built-in sensor elements—eliminating probe handling, cross-contamination risk, and calibration drift associated with exposed electrode surfaces. Its measurement architecture relies on a four-electrode conductivity cell for enhanced accuracy and stability across wide dynamic ranges, coupled with a replaceable solid-state pH/ORP sensing module and a high-stability thermistor network. Designed explicitly for municipal drinking water, wastewater effluent, industrial process water, and environmental monitoring applications, the MP Meter delivers laboratory-grade reproducibility in a ruggedized portable platform compliant with ASTM D1125 (conductivity), ISO 7888 (electrical conductivity of water), and USP (water conductivity testing for pharmaceutical use).

Key Features

• Probe-free design with integrated sample chambers—enables true one-handed operation and eliminates electrode storage, cleaning, and hydration protocols.
• IP67/NEMA 6-rated housing—fully submersible to 1 meter depth and certified for continuous operation in wet, dusty, or splash-prone environments.
• Four-electrode conductivity cell—minimizes polarization error and ensures stable readings across low- and high-conductivity matrices (0–200 mS/cm).
• Replaceable pH/ORP sensor module—field-swappable without recalibration; lifetime verification supported via diagnostic self-test.
• Non-volatile microprocessor memory—retains calibration coefficients, measurement history, and user settings through battery replacement.
• Auto-ranging capability across five discrete scales per parameter—reduces manual range selection errors and improves measurement efficiency.
• Adjustable temperature compensation coefficient (0.00–9.99 %/°C)—supports application-specific compensation for non-standard electrolytes.
• Preloaded conversion profiles (KCl, 442™, NaCl) plus user-definable TDS/resistivity factors—ensures traceable compliance with regional regulatory frameworks.

Sample Compatibility & Compliance

The MP Meter accommodates aqueous samples with suspended solids ≤50 mg/L and turbidity ≤100 NTU. It is validated for use with potable water, surface water, groundwater, treated wastewater, cooling tower water, and ultrapure water (UPW) systems where conductivity thresholds align with USP , EP 2.2.38, and JP 2.05 standards. The instrument conforms to IEC 61000-4 electromagnetic compatibility requirements and meets CE marking criteria under the EU Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU). For regulated environments, its calibration traceability supports GLP and GMP documentation workflows, including audit-ready calibration logs and timestamped measurement records when used with MP DataLink software.

Software & Data Management

The optional MP Base Dock provides USB-powered charging, automatic data synchronization, and firmware updates. MP DataLink software (Windows-compatible) imports all stored measurements—including parameter type, numeric value, unit, temperature, solution profile, date/time stamp, and operator ID—and exports structured CSV files compatible with LIMS, Excel, and statistical analysis platforms. Each record includes embedded metadata required for FDA 21 CFR Part 11 compliance when deployed with appropriate system validation and electronic signature controls. Data integrity is reinforced by write-protected memory partitions and sequential record numbering with no user-editable fields.

Applications

• Drinking water treatment: Real-time verification of disinfection efficacy (via ORP), source water conductivity trends, and post-treatment pH stability.
• Wastewater discharge monitoring: Regulatory reporting of TDS, salinity, and conductivity per NPDES permit conditions.
• Industrial boiler feedwater: Resistivity surveillance to detect early-stage ion leakage or resin exhaustion.
• Pharmaceutical water systems: USP -compliant conductivity mapping across distribution loops and point-of-use locations.
• Environmental field surveys: Rapid screening of stream, lake, or estuary water quality with minimal equipment footprint.
• Education and training labs: Robust, low-maintenance platform for teaching fundamental electrochemical principles without fragile glass electrodes.

FAQ

Does the MP Meter require routine probe cleaning or storage solution?
No—its probe-free architecture eliminates external electrodes entirely. The integrated sensors are sealed within the VALOX® sample chamber and do not require hydration, polishing, or chemical storage.
Can the MP Meter be calibrated in the field without external standards?
Yes—single-button calibration uses internal electronic references for pH, ORP, and conductivity. Only standardized buffer and calibration solutions are needed for initial verification; subsequent field adjustments rely on the instrument’s stable onboard references.
Is temperature compensation mandatory for conductivity measurements?
No—ATC can be enabled, disabled, or manually adjusted to match specific process conditions or regulatory requirements (e.g., fixed 25 °C reference per ASTM D1125).
How is data security maintained during battery replacement?
All calibration data, measurement history, and configuration settings reside in non-volatile memory and persist across power cycles without loss.
What regulatory standards does the MP Meter support out-of-the-box?
It natively supports USP , ASTM D1125, ISO 7888, EN 27888, and EPA Method 120.1 for conductivity and TDS; pH and ORP measurements align with ISO 10523 and ASTM D1293.