The HI991300 portable meter features a large multi-level LCD which displays both pH, low-range EC or TDS and temperature readings simultaneously. The pH readings are displayed with a 0.01 resolution and an accuracy of +/-0.01 pH while the EC and TDS readings are displayed with a 0.01 mS/cm and 10 ppm (mg/L) resolution and 2% full-scale accuracy. The EC range of the HI991300 is from 0 to 3999 µS/cm and TDS is from 0 to 2000 ppm using the 0.45 conversion factor. The EC to TDS conversion factor is selectable 0.45 and 1.0. A built-in temperature sensor allows for automatic temperature compensated measurements of pH and . The HI991300 has many advanced features that are found in more expensive portable instrumentation including automatic calibration, buffer/standard recognition and temperature compensation. The LCD screen has indicators for calibration status and stability, as well as on-screen tutorial messages. The battery percent level is displayed at start up alerting the user to the remaining battery power that is available. The supplied HI12883 is a 3-in-1 pre-amplified multiparameter probe that measures pH, EC/TDS, and temperature within a single polypropylene body. The amplifier for the pH electrode prevents interference from humidity and sources of electrical noise include circulating pumps, motors, and ballasts for grow lights. The design consideration for the HI991300 is ideal for measuring the pH, EC/TDS, and temperature in greenhouses, hydroponics, environmental monitoring, water treatment, wastewater treatment and boilers and cooling towers.
Simplified one button calibration
One or two point pH calibration is automatic to a pre-programmed buffer set (4.01/7.01/10.01 pH or 4.01/6.86/9.18) or single point pH and EC calibration with the Hanna Quick Cal calibration solution. To perform a quick cal calibration, simply press and hold the left power/mode button while in measurement mode for three seconds and let go to enter calibration mode. Once both pH and EC are calibrated "CAL OK" is displayed and the meter returns to measurement mode.
HI1288 polypropylene body amplified pH electrode with built-in EC/TDS and temperature sensors
The HI991300 is supplied with an amplified polypropylene body pH/EC/TDS/temperature probe. The built-in amplifier will reduce the effects of electrical noise on the high impedance pH measurement. Examples of sources of electrical noise include circulating pumps, motors, and ballasts for grow lights.
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
Wide pH Range
Choice of either a 0.5 or 0.7 conversion factor0.5 (500 CF) conversion factor is for an EC reading of 1000 μS/cm = 500 ppm0.7 (700 CF) conversion factor is for an EC reading of 1000 μS/cm = 700 ppm
Selectable EC to TDS conversion factor
All readings are compensated for variations in temperatureTemperature displayed in oC or oF along with pH, EC or TDS reading
- Automatic Temperature Compensation
Meter displays a clock tag that will disappear when the reading has achieved stability
Freezes reading on the display to allow recording of measurement
Meter will automatically shut off if there is not enough power to get an accurate measurement
BEPS (Battery Error Prevention System
- Battery % level at startup
When the level is below 5%, the battery symbol on the LCD blinks to indicate a low battery condition.
- Low Battery Indicator
User selectable automatic shut-off ff to conserve battery life. Options are after 8 minutes, 60 minutes , or disabled.
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 to 3999 µS/cm EC Resolution 1 µS/cm EC Accuracy ±2% F.S. EC Calibration automatic, one-point at 1413 µS/cm TDS Range 0 to 2000 ppm (mg/L) TDS Resolution 1 ppm (mg/L) TDS Accuracy ±2% F.S. TDS Calibration automatic, one-point at: 1382 ppm (CONV=0.5), 1500 ppm(CONV=0.7) EC/TDS Temperature Compensation automatic Temperature Correction Coefficient β selectable from 0.0 to 2.4 %/ °C with 0.1 increment 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.) Ordering Information HI991300 is supplied complete with HI12883 pH/EC/temperature probe, pH 4.01 calibration buffer sachet (1), pH 7.01 calibration buffer solution sachet (1), HI70031 1413 μS/cm calibration solution sachet (1), HI70032 1382 ppm calibration 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.