This document introduces the features and usage of the HI99151 pH and temperature meter
The HI99151 is a waterproof, portable pH and temperature meter designed for use in beer production. It features automatic calibration, a dual-line display, and a rugged FC2143 probe with integrated temperature sensing. The device supports one or two-point calibration using standard or NIST buffers and includes battery life indication and auto-off functionality. It is IP67 rated and suitable for field use.
The manual covers setup, operation, electrode maintenance, calibration, troubleshooting, and warranty information. It includes detailed instructions for connecting the probe, performing measurements, freezing readings, and maintaining the electrode for optimal performance in brewing environments.
| Range | ‑2.00 to 16.00 pH / ‑2.0 to 16.0 pH ±825 mV (pH‑mV) ‑5.0 to 105.0 °C/23.0 to 221.0 °F |
|---|---|
| Resolution | 0.01 pH / 0.1 pH 1 mV 0.1 °C/0.1 °F |
| Accuracy @ 25 °C / 77 °F | ±0.02 pH / ±0.1 pH ±1 mV (pH‑mV) ±0.5 °C up to 60 °C; ±1.0 °C outside ±1.0 °F up to 140 °F; ±2.0 °F outside |
| Temperature Compensation | Automatic ‑5.0 to 105.0 °C/23.0 to 221.0 °F |
| pH Calibration | Automatic, 1 or 2 point selectable buffer set Standard (4.01, 7.01, 10.01) or NIST (4.01, 6.86, 9.18) |
| Probe (included) | FC2143 preamplified pH/temperature probe with flat glass tip, DIN connector and 1 m (3.3’) cable |
| Battery type/life | 1.5V AAA (3 pcs.) approx. 1400 hours of continuous use |
| Environment | 0 to 50 °C (32 to 122 °F) RH max. 100% |
| Meter dimensions | 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”) |
| Weight (with batteries) | 196 g (6.91 oz.) |
| Case ingress protection rating | IP67 |
The pH measurement range is ‑2.00 to 16.00 pH.
The HI99151 includes an FC2143 preamplified pH/temperature probe with a flat glass tip, DIN connector, and 1 m (3.3’) cable.
The battery life is approximately 1400 hours of continuous use with 3 x 1.5V AAA batteries.
The HI99151 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. Electrodes and probes are warranted for six months.