Waterproof and it floats!
HANNA’s exclusive cartridge pH and ORP electrode
Extendable cloth pH junction
Automatic Temperature Compensation
Automatic calibration
Battery % Level at startup and stability indicator
HOLD function

HI 98121 is a waterproof meter that measures pH, ORP and temperature. The housing of this tester has been completely sealed against humidity and are designed to float. Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement. When the cloth junction becomes clogged and response time is sluggish, simply pull out 3 mm (1/8”) to clear the clogging which will improve response time and stability. The exposed stainless steel temperature sensor on these models facilitates faster and more accurate temperature measurement.

Order Information:
HI 98121 (ORP/pH) is supplied with HI 73127 pH electrode, HI 73128 electrode removal tool, batteries and instructions.

Range   pH          -2.00 to 16.00 pH
ORP       ±1000 mV
Temperature    -5.0 to 60.0°C / 23.0 to 140.0°F
Resolution          pH          0.01 pH
ORP       1 mV
Temperature    0.1°C / 0.1°F
Accuracy             pH          ±0.05 pH
ORP       ±2 mV
Temperature    ±0.5°C / ±1°F
Calibration          pH          4.01 / 7.01 / 10.01 or 4.01 / 6.86 / 9.18
ORP       factory calibrated, automatic, one or two points with two sets of memorized buffers

Temperature     Compensation Automatic for pH readings
Electrode      HI 73127 replaceable pH electrode (included); fixed ORP sensor

Battery Type / Life          1.5V (4) / approximately 250 hours of continuous use;
auto-off after 8 minutes of non-use
Environment     -5 to 50°C (23 to 122°F); RH max 100%
Dimensions        163 x 40 x 26 mm (6.4 x 1.6 x 1.0")
Weight                 100 g (3.5 oz.)