Specifications HI98127 (pHep®4) HI98128 (pHep®5) pH Range -2.0 to 16.0 pH -2.00 to 16.00 pH Resolution 0.1 pH 0.01 pH Accuracy ±0.1 pH ±0.05 pH Temperature Range -5.0 to 60.0°C / 23.0 to 140.0°F -5.0 to 60.0°C / 23.0 to 140.0°F Resolution 0.1°C / 0.1°F 0.1°C / 0.1°F Accuracy ±0.5°C /±1°F ±0.5°C /±1°F Additional Specifications pH Calibration automatic, one, two, or (HI98128) three-point with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or 4.01 / 6.86 / 9.18) Temperature Compensation automatic Battery Type / Life 1.5V (4) / approx. 300 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.) Ordering Information HI98127 (pHep®4) and HI98128 (pHep®5) are supplied with HI73127 pH electrode, HI73128 electrode removal tool, pH 4.01 buffer solution sachets (2), pH 7.01 buffer solution sachets (2), electrode cleaning solution sachet, electrode storage solution sachet, batteries, and instructions. Pocket clip A pocket clip is featured on the back of the pHep 4 and pHep 5 Replaceable pH electrode cartridge The Combo features an easy-to-replace pH electrode. The sturdy, snap-in connector means there are no pins which could bend or break. Exposed temperature sensor An exposed temperature sensor allows for rapid automatic temperature compensated pH measurements. Protective cap The protective cap features an internal cup that can be filled with storage solution to keep the pH sensor moist. LCD Display Features Standard or N.I.S.T buffer calibration Automatic calibration is performed with two sets of memorized buffers for greater accuracy. HOLD function The HOLD function “freezes” the LCD display temporarily. On-screen battery life LCD indicates the percentage of battery power remaining upon startup. pH solutions begin on page 2.158; see pH electrode specifications on page 1.70 1 Testers and Monitors 1.15 www.hannainst.com | testers
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