Features at-a-glance
- 3 sensors in a single probe
pH electrode - Preamplified for resistance to electrical noise including that generated by pumps and ballast
EC/TDS sensor - amperometric two pole design
Temperature - NTC sensor for accurate temperature measurement and compensation
Designed to withstand the humidity of a growing environment
pH range is from 0.00 to 14.00 pH
- Selectable EC to TDS conversion factor
Choice of either a 0.5 or 0.7 conversion factor
0.5 (500 CF) conversion factor is for an EC reading of 10 mS/cm = 5 ppt
0.7 (700 CF) conversion factor is for an EC reading of 10 mS/cm = 7 ppt
- Automatic Temperature Compensation
All readings are compensated for variations in temperature
Temperature displayed in oC or oF along with pH, EC or TDS reading
Meter displays a clock tag that will disappear when the reading has achieved stability
Freezes reading on the display to allow recording of measurement
- BEPS (Battery Error Prevention System
Meter will automatically shut off if there is not enough power to get an accurate measurement
- Battery % level at startup
When the level is below 5%, the battery symbol on the LCD blinks to indicate a low battery condition.
User selectable automatic shut-off ff to conserve battery life. Options are after 8 minutes, 60 minutes , or disabled.
| SKU |
HI991301 |
| Name |
Portable Waterproof pH/EC/TDS Meter (High Range) - HI991301 |
| pH Range |
-2.00 to 16.00 pH; -2.0 to 16.0 pH |
| pH Resolution |
0.01 pH; 0.1 pH |
| pH Accuracy |
±0.02 pH; ±0.1 pH |
| 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) |
| pH Temperature Compensation |
automatic 0 to 50 °C; 32 to 122 °F |
| pH CAL Check (electrode diagnostics) |
probe condition indicator |
| pH Sensor Check |
yes |
| mV Range |
±825 mV (pH‐mV) |
| mV Resolution |
1 mV (pH‐mV) |
| mV Accuracy |
±1 mV (pH‐mV) |
| EC Range |
0.00 to 20.00 mS/cm |
| EC Resolution |
0.01 mS/cm |
| EC Accuracy |
±2% F.S. |
| EC Calibration |
automatic, one-point at 12.88 mS/cm |
| TDS Range |
0.00 to 10.00 ppt (g/L) |
| TDS Resolution |
0.01 ppt (g/L) |
| TDS Accuracy |
±2% F.S. |
| TDS Calibration |
automatic |
| EC/TDS Temperature Compensation |
automatic |
| Temperature Correction Coefficient |
β selectable from 0.0 to 2.4 %/ °C with 0.1 increments |
| EC to TDS Conversion Factor |
selectable from 0.45 to 1.00 with 0.01 increments |
| Temperature Range |
‐5.0 to 105.0 °C; 23.0 to 221.0 °F |
| Temperature Resolution |
0.1°C; 0.1°F |
| Temperature Accuracy |
±0.5°C; ±1°F |
| pH/EC Probe |
HI12883 PVC body, pre-amplified multiparameter probe with internal temperature sensor, quick connect DIN connector and 1m cable |
| Automatic Shut-Off |
user selectable: after 8 min, 60 min or disabled |
| Battery Type/Life |
1.5V (3) AAA / approximately 600 hours of continuous use |
| IP Protection |
IP67 |
| Environment |
0 to 50°C (32 to 122°F); RH max 100% |
| Dimensions |
154 x 63 x 30 mm (6.1 x 2.5 x 1.2”) |
| Weight |
196 g (6.91 oz.) |
HI991301 is supplied complete with HI12883 pH/EC/temperature probe, pH 4.01 calibration buffer sachet (1), pH 7.01 calibration buffer solution sachet (1), HI70030 12.88 mS/cm calibration solution sachet (1), HI70038 6.44 ppt calibration solution sachet (1), HI700601 electrode cleaning solution sachet (2), 100 mL beaker (1), batteries, calibration certificates for both meter and probe, instruction manual, and rugged thermoformed carrying case.