The HI-991301 Portable High Range Meter is a multi-parameter instrument designed for precise measurement of pH, electro-conductivity (EC), total dissolved solids (TDS), and temperature in demanding laboratory and industrial environments. Built for consistency and reproducibility, it is ideal for applications requiring accurate monitoring of water quality.
This advanced handheld meter comes equipped with the HI-12883 multi-parameter probe, which integrates a pH sensor, EC/TDS graphite cell, and temperature sensor into one rugged polypropylene body. The probe features a domed pH bulb (0–13 pH range), Ag/Cl reference electrode with gel electrolyte, and a retractable cloth junction for improved stability and extended life. A built-in pre-amplifier minimizes electrical noise interference, ensuring reliable pH readings.
The HI-991301 offers user-selectable TDS conversion factors (0.45 to 1.00) and adjustable temperature compensation coefficient (0.0 to 2.4%/°C), allowing accurate measurements across different solution types. The large three-line LCD simultaneously displays pH, EC/TDS, and temperature, improving usability and efficiency.
Additional features include pH electrode condition indication, mV display for electrode diagnostics, last calibration memory, quick-connect probe system, audible keystroke confirmation, battery status indicator, and auto shut-off function. Its IP67 waterproof casing ensures durability in harsh working environments.
The meter is supplied complete with calibration buffers, cleaning solutions, calibration standards, batteries, and a rugged carrying case—ready for immediate use in the field or lab.
