Waterproof pH/mV Meters with Extended Range
The HI 991001 and HI 991002 meters offer IP 67 waterproof protection in a compact casing. The included electrode has a built-in temperature sensor and amplifier, to render measurements impervious to noise and electrical interference.
The large display shows readings in an extended range from -2.00 to 16.00 pH and simultaneously shows temperature from -5.0 to 105.0 °C or 23 to 221°F. HI 991002 also measures ORP in the ±1999 mV range.
These meters have a stability indicator and hold feature that prompts when to take the reading and freezes the display for easy and accurate recording. The large display also has graphic symbols to guide through all operations.
The battery life of the meters guarantee over 1500 hours of continuous use. At startup, they perform a self-check and then display the percentage of the remaining battery level to assure proper working condition.
Calibration is performed automatically at 1 or 2 points using standard or NIST buffers.
Features
- IP 67 waterproof protection
- Amplified electrode with internal temperature sensor
- Extended pH range from -2.00 to 16.00 pH
- Stability indicator and hold feature
- Automatic temperature compensation
- Automatic 1 or 2 point calibration with 2 sets of memorized buffer values
- Graphical symbols for easy operation guidance
- Battery level indicator at startup
- Auto-off after 8 minutes of non-use
Specifications
| Parameter |
HI 991001 |
HI 991002 |
| pH Range |
-2.00 to 16.00 pH |
-2.00 to 16.00 |
| mV Range |
— |
±1999 mV |
| Temperature Range |
-5.0 to 105.0°C / 23.0 to 221.0°F |
-5.0 to 105.0°C / 23.0 to 221.0°F |
| pH Resolution |
0.01 pH |
0.01 pH |
| mV Resolution |
— |
1 mV |
| Temperature Resolution |
0.1°C / 0.1°F |
0.1°C / 0.1°F |
| pH Accuracy (@20°C) |
±0.02 pH |
±0.02 pH |
| mV Accuracy |
— |
±2 mV |
| Temperature Accuracy |
±0.5 (up to 60°C); ±1°C (outside)
±1°F (up to 140°F); ±2°F (outside) |
±0.5 (up to 60°C); ±1°C (outside)
±1°F (up to 140°F); ±2°F (outside) |
| pH Calibration |
Automatic, 1 or 2 point with 2 sets of memorized buffer values (pH 4.01/7.01/10.01 or 4.01/6.86/9.18) |
| Temperature Compensation |
Automatic, -5 to 105°C (23 to 221°F), for pH readings |
| Electrode |
HI 1296D amplified pH electrode with temperature sensor, DIN connector, 1 m cable (included) |
| Battery Type |
3 x 1.5V AA |
| Battery Life |
approx. 2000 hours of continuous use |
approx. 1500 hours of continuous use |
| Auto-off |
After 8 minutes of non-use |
| Environment |
0 to 50°C (32 to 122°F); RH max 100% |
| Dimensions / Weight |
150 x 80 x 36 mm (5.9 x 3.1 x 1.4'') / 210 g (7.4 oz.) |
Ordering Information
HI 991001 is supplied complete with HI 1296D pH electrode with internal temperature sensor, pH 4 and pH 7 buffer sachets, HI 700661 electrode cleaning solution (2 x 20 mL), batteries, rugged carrying case and instructions.
HI 991002 is supplied complete with HI 1296D pH electrode with internal temperature sensor, pH 4 and pH 7 buffer sachets, HI 700661 electrode cleaning solution (2 x 20 mL), batteries, rugged carrying case and instructions.
Accessories
| Model |
Description |
| HI 1296D |
Combination pH electrode with internal temperature sensor and amplifier, DIN connector and 1 m cable |
| HI 1297D |
Combination pH/ORP electrode with internal temperature sensor and amplifier, DIN connector and 1 m cable |
| HI 7004L |
pH 4.01 buffer solution, 500 mL bottle |
| HI 7006L |
pH 6.86 buffer solution, 500 mL bottle |
| HI 7007L |
pH 7.01 buffer solution, 500 mL bottle |
| HI 7009L |
pH 9.18 buffer solution, 500 mL bottle |
| HI 7010L |
pH 10.01 buffer solution, 500 mL bottle |
| HI 70300L |
Electrode storage solution, 500 mL bottle |
| HI 710007 |
Shockproof rubber boot, blue |
| HI 710008 |
Shockproof rubber boot, orange |
