- Waterproof and designed to float
 - Automatic Temperature Compensation
 - Automatic calibration
 - Tactile grip casings
 - HOLD function
 - Automatic shut-off
 - Efficient two button operation
 - Temperature in °C or °F
 - BEPS (Battery Error Prevention System)
 - Battery % displayed at startup
 
The pHep®5 tester is for users that require the greatest accuracy and features while staying economical.
This model has BEPS as well as user selectable automatic shut-off, replacable pH electrode cartridge, stability indicator and automatic calibration.
Order Information: HI 98128 (pHep®5) are supplied with HI 73127 pH electrode, HI 73128 electrode removal tool, batteries and instructions.
  Manual: Download
Specification :
| Range | pH | -2.00 to 16.00 pH | 
| Temperature | -5.0 to 60.0°C / 23.0 to 140.0°F | |
| Resolution | pH | 0.01 pH | 
| Temperature | 0.1°C / 0.1°F | |
| Accuracy @ 20°C | pH | ±0.05 pH | 
| Temperature | ±0.5°C / ±1°F | |
| pH Calibration | automatic, at one or two points with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18) | |
| Temperature Compensation | Automatic | |
| Battery Type / Life | 1.5V (4) / approximately 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.) | 
เครื่องวัดปริมาณฟอสเฟต ช่วงต่ำ รุ่น HI713						
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