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Hanna Instruments
ORP, pH & Temp Test Meter
HI 98121

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  • Simple to Use

  • Highly Accurate

  • Set/hold button

  • Floating & Waterproof Body

The new Hanna HI-98121 tester has all the functions needed to test your Microwater system. It is waterproof and comes with with advanced functions to test for simultaneous pH and ORP measurements. HI 98121 also reads temperature, which is continuously displayed on the dual level LCD. The pH electrode fiber junction can be easily pulled out for replenishment. The pH electrode cartridge can be quickly replaced with the supplied electrode removal tool. The encapsulated external stainless steel temperature sensor provides a fast response due to its close proximity to the pH electrode. The HI 98121 works with common batteries and displays the percentage of battery life remaining when turned on. The stability indicator ensures reliable readings.

HI 98121 is supplied complete with protective cap, electrode removal tool, batteries and instructions


Range ORP   1000 mV
Range pH   -2.00 to 16.00pH
Range Temp   -5.0 to 60.0C / 23.0 to 140.0F
Resolution ORP   1 mV
Resolution pH   0.01 pH
Resolution Temp   0.1C / 0.1F
Accuracy (@20C/68F) ORP   2 mV
Accuracy (@20C/68F) pH   0.5 pH
Accuracy (@20C/68F) Temp   0.5C / 1F
Calibration ORP   factory calibrated
Calibration pH   automatic, 1 or 2 points with 2 sets of memorized buffers
Temp. Compensation   automatic for pH readings
Electrode   HI 73127 replaceable pH electrode(included); fixed ORP sensor
Battery Type / Life   4 x 1.5V with BEPS / approx. 250 hours of continuous use; auto-off after 8 minutes of non-use
Environment   -5 to 50C (23 to 122F); RH max 100%
Dimensions   163 x 40 x 26 mm
Weight   100 g


Hanna HI-98121 ORP & Temperature Test Meter

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Hanna HI-98121 ORP, pH & Temp. Meter


Hanna HI-7061M Cleaning Solution - details


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 Inventory Status: In Stock

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