Hanna Instruments HI99301 Portable High Range EC/TDS Meter

The HI99301 portable, waterproof EC/TDS and temperature meter is appropriate for use in a variety of processes, including reverse osmosis, wastewater treatment, and HVAC. It tests TDS in ppt and high range conductivity in mS/cm. A two-ring sensor that avoids clogging and is simple to clean is the HI763063 EC/TDS probe. In addition, the probe has a temperature sensor built in that enables Automatic Temperature Compensation from 0 to 60°C (32 to 140°F).

The meter is small enough to fit in the palm of your hand, and the electrode cord is kept out of the way thanks to the bottom probe connection. The primary reading, temperature, and calibration instructions are all displayed simultaneously on the big, multi-level LCD. The LCD’s symbols and messages guide users through operations while indicating the status of the meter.

Features at-a-glance

Two-ring Probe – The HI763063 is a two-pole probe that comes with the HI99301, offering an accurate solution for high range EC and TDS readings. The probe features a built-in temperature probe to allow for temperature compensated readings.

Two Measurement Modes – HI99301 offers two measurement modes: EC and TDS. Users can easily switch between measurement modes with a simple press of the MODE button. EC measurements range from 0.00 to 20.00 mS/cm; TDS measurements range from 0.00 to 10.00 ppt.

Adjustable TDS Factor – The TDS value in aqueous solutions is directly proportional to conductivity. The ratio between the two parameters depends on the solution being measured. The HI99301 has an adjustable TDS factor from 0.45 to 1.00 with 0.01 intervals, allowing users to choose the conversion factor that is the most appropriate for their particular solution.

Automatic Temperature Compensation – Since temperature has such a dramatic effect on conductivity and TDS readings, having a meter that offers temperature compensated readings is invaluable. The probe of the HI99301 features a built-in temperature sensor that automatically accounts for the effects of temperature in the range of 0 to 60°C (32 to 140°F).

Adjustable Temperature Compensation Coefficient – The temperature compensation coefficient, also known as β, is adjustable from 0.0 to 2.4%/°C with 0.1% intervals; this factor corrects the reading a set percentage % for each degree Celsius change in the sample.

Automatic Calibration –  The HI99301 can be automatically calibrated at one point in a standard EC or TDS solution. A 12.88 mS/cm standard is used for EC calibration, which will automatically calibrate TDS readings. However, if the meter is in TDS mode and set to 0.5 conversion factor, a direct calibration in 6.44 ppt TDS calibration solution can be used.

Battery Error Prevention System (BEPS) – The Battery Error Prevention System detects when the batteries become too weak to ensure reliable measurements.

Instability Indicator – The HI99301 displays a clock tag that will disappear when a reading has achieved stability.