Hanna HI98130 Combo pH/EC/TDS Tester | High Range, Waterproof

Hanna HI98130 for pH, EC and TDS in One Dip

The HI98130 is a pocket tester that measures pH, conductivity, TDS and temperature from a single waterproof body. Its pH range runs 0.0 to 14.0 at 0.01 resolution, with an accuracy of ±0.05 pH. EC reads 0.00 to 20.00 mS/cm and TDS reads 0.00 to 10.00 ppt, both within ±2% of full scale. Temperature covers 0 to 60°C (32 to 140°F) and drives automatic compensation on every reading. Calibration is automatic: one or two points for pH, and one point for EC at 12.88 mS/cm. The EC-to-TDS factor adjusts from 0.45 to 1.00, and the temperature coefficient from 0.0 to 2.4%/°C. A graphite EC probe resists salt build-up, which keeps conductivity readings stable in strong feeds. The pH sensor is the replaceable HI73127, fitted with an extendable cloth junction. Four 1.5V batteries run it for about 100 hours, and it shuts off after 8 minutes idle. The body measures 163 x 40 x 26 mm, weighs about 100 g, and floats if it slips into a tank.

A Combo pH/Conductivity/TDS Tester Built for Reservoir Checks

Most growers use it right after mixing a batch, checking pH first and strength second before the pump comes on. The high EC range suits concentrated bloom feeds and stock tanks that would push a low-range pen off the scale. Set the TDS factor to match the ppm scale on your nutrient chart, so the numbers line up with the label. Dip the tip past the sensors, stir gently, and wait for the stability indicator before writing anything down. Rinse in clean water afterward, then cap the pH sensor with a little storage solution. Weekly pH calibration with fresh buffers keeps it honest, while EC calibration can run less often. The trade-off of a high range is coarse resolution near zero. Raw RO water and very weak seedling feeds read close to the bottom of the scale. When the pH reading turns slow or wanders, swap in a new electrode with the included removal tool. The meter itself carries on, so only the sensor needs replacing.

Key Features

• Four readings, one dip: pH, EC, TDS and temperature appear together, so a reservoir check takes one sample instead of two meters.
• High-range EC: Reads strong bloom feeds and stock solutions that exceed a low-range tester's scale.
• Automatic temperature compensation: Readings correct themselves for warm or cold solution without a lookup table.
• Replaceable pH electrode: When the sensor ages, a new HI73127 restores the meter for a fraction of the cost of a new tester.
• Graphite EC probe: The graphite sensor resists salt fouling and wipes clean after use in heavy feeds.
• Waterproof and floating: The sealed body survives a drop into the reservoir and stays on the surface for retrieval.

Technical Specifications