The HI9814 digital pH and ppm meter features a large multi-level LCD which displays both pH, 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 HI9814 is from 0.00 to 6.00 mS/cm and TDS is from 0 to 3000 ppm using the 0.5 conversion factor. The EC to TDS conversion factor is selectable 0.5 (500) and 0.7 (700 ppm). A built-in temperature sensor allows for automatic temperature compensated measurements of EC and TDS. The HI9814 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 HI1285-7 is a polypropylene body, amplified pH electrode with a built-in EC/TDS and temperature sensors. 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 HI9814 is a versatile ppm meter designed for hydroponics, greenhouse, and agriculture applications.
Simplified one button calibration
One or two point pH calibration is automatic to a pre-programmed buffer set (4.01, 7.01 and 10.01) 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.
HI1285-7 polypropylene body amplified pH electrode with built-in EC/TDS and temperature sensors
The HI9814 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
Selectable time before meter will automatically shut off to conserve battery life. Options are after 8 minutes, 60 minutes , or disabled.
The HI1294D is a pH/temperature electrode that allows the direct pH measurement of soils and soil-less media. When this probe is used the HI9814 the EC/TDS functions will not be available.
- Optional direct soil/soiless pH electrode available
The connections between the prior model and current model are interchangeable however, will no longer be waterproof.
pH Range 0.00 to 14.00 pH pH Resolution 0.01 pH pH Accuracy ±0.01 pH pH Calibration automatic, at one or two points using standard buffers (pH 4.01, 7.01,10.01); one point calibration using quick calibration solution EC Range 0.00 to 6.00 mS/cm EC Resolution 0.01 mS/cm EC Accuracy ±2% FS EC Calibration automatic, one-point at 1.41 mS/cm or 5.00 mS/cm; one-point calibration using quick calibration solution TDS Range 0 to 3000 ppm (500 CF); 0 to 3999 ppm (700 CF) TDS Resolution 10 ppm (mg/L) TDS Accuracy ±2% F.S. Temperature Range 0.0 to 60.0°C / 32.0 to 140.0°F Temperature Resolution 0.1°C / 0.1°F Temperature Accuracy ±0.5°C /±1°F Temperature Compensation pH: automatic; EC/TDS: automatic with β set at 1.9%/°C TDS Conversion Factor 0.5 (500 ppm) or 0.7 (700 ppm) Electrode/Probe HI1285-7 polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, DIN connector and 1m cable Battery Type/Life 1.5V (3) AAA / approximately 500 hours of continuous use; auto-off after 8 minutes of non-use Auto-off after 8 minutes, 60 minutes, disabled Environment -5 to 50°C (23 to 122°F); RH max 100% Dimensions 152 x 58 x 30 mm (6.0 x 2.3 x 1.2”) Weight 205 g (7.2 oz.) Ordering Information HI9814 is supplied with HI1285-7 multiparameter probe, HI50036-0 Quick Cal buffer solution sachet (3), HI700661 pH electrode cleaning solution sachet for agriculture (3), 1.5 AAA batteries (3), and instructions. Warranty 2 years (probe 6 months)