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HI98129 Combo pH/EC/TDS Tester and Related Products

  • The low range Combo® pH, EC, TDS (ppm) and temperature meter is one of Hanna’s most popular meters. The waterproof design, simple operation, and replaceable electrode mean that you can rely on this meter for years. You can replace the pH electrode for just $49.

    The HI98129 is designed for low range use (0 to 3999 µS/cm or 0-2000 ppm). Choose the HI98130 for the high range model.

    Pricing includes the HI98129 Combo Tester, HI72127 pH electrode, electrode removal tool, batteries, and free shipping.

    ·       Compact & waterproof design fits right in your pocket so you can take it anywhere. 

    ·       Replaceable pH electrode extends the life of your tester for years. 

    ·       Great for hydroponics, aquariums, pools, & ponds. 


    The HI98129 is an easy-to-use and accurate waterproof pH, conductivity, TDS (ppm) tester. It measures pH, EC in the low range (0 to 3999 µS/cm), TDS (0 to 2000 ppm), and temperature. This floating, waterproof combination pocket tester has an easy to read, LCD and an automatic shut-off. All pH, EC, and TDS (ppm) readings are automatically temperature compensated (ATC) to prevent temperature-related variations in your measurements. For EC and TDS (ppm) readings, the EC/TDS conversion factor (CONV) is selectable by the user, as well as the temperature compensation coefficient β (BETA).


    The HI98129 tester features an easy to replace pH electrode cartridge with an extendable cloth junction. The extendable cloth junction helps increase electrode life and the replaceable pH cartridge means that this tester does not need to be thrown away when the pH sensor is exhausted. Also, the sturdy, snap-in connector means there are no pins to bend or break!



    The graphite conductivity probe provides greater accuracy because it cannot be contaminated by salt deposits in the solution. The exposed temperature sensor provides fast response times and guarantees highly accurate temperature compensated readings.



    ·       3 sensors in a single tester

    pH electrode with extractable junction

    Amperometric EC/TDS sensor

    Exposed temperature probe for faster EC and TDS (ppm) readings

    ·       Waterproof

    Designed to float if accidently dropped in sample

    ·       Wide pH Range

    pH range is from 0.00 to 14.00 pH

    ·       Selectable EC to TDS (ppm) conversion factor

    Choice of either a 0.45 or 1.0 conversion factor


    ·       Automatic Temperature Compensation

    All readings are compensated for variations in temperature

    Temperature displayed in oC or oF along with pH, EC or TDS reading

    ·       Stability indicator

    Meter displays a clock tag that will disappear when the reading has achieved stability


    ·       HOLD button

    Freezes reading on the display to allow recording of measurement


    ·       BEPS (Battery Error Prevention System)

    Meter will automatically shut off if there is not enough power to get an accurate measurement


    ·       Battery % level at startup

    ·       Low Battery Indicator

    When the level is below 5%, the  battery symbol on the LCD blinks to indicate a low battery condition.


    ·       Auto-off 

    Auto-off  feature automatically shuts off  meter after 8 minutes of non-use to maximize battery life



    pH Range

    0.00 to 14.00 pH

    pH Resolution

    0.01 pH

    pH Accuracy

    ±0.05 pH

    Conductivity Range

    0 to 3999 µS/cm

    Conductivity Resolution

    1 µS/cm

    Conductivity Accuracy

    ±2% F.S.

    TDS Range

    0 to 2000 ppm (mg/L)

    TDS Resolution

    1 ppm (mg/L)

    TDS Accuracy

    ±2% F.S.