The HI9814 is a slim, lightweight, and waterproof portable meter that measures the pH, conductivity (EC), total dissolved solids (TDS) and temperature of nutrient solutions used in hydroponics, aquaponics and greenhouse growing. The meter operation is simplified with only two buttons. One is used for turning the meter on/off and for calibration while the other is used to switch between the measurement modes. The HI9814 has advanced features including a selectable EC to TDS conversion factor (0.5 - 500 ppm and 0.7 - 700 ppm).
3 in 1 amplified probe with pH, EC/TDS and temperature sensors
Quick Cal Mode to calibrate pH and EC/TDS with one solution
EC to TDS Conversion factor selectable between 0.5 (500 ppm) and 0.7 (700 ppm)
An on-screen indicator provides visual confirmation that your probe is working at its best.
Low Battery Indicator
The included batteries provide 600 hours of continuous use. When the battery level is below 10%, a warning symbol will blink to indicate low battery condition. When low battery power may affect your results, the meter will shut down to avoid erroneous readings caused by low battery level.
The auto-off feature can be set to shut the meter off at 8 or 60 minutes, or it can be disabled so that the meter continuously stays on. The auto-off feature prolongs battery life for peace-of-mind and energy savings if the meter is accidentally left on.
Built to be Durable
Designed to withstand the knocks, drops, and spills of real life, the new IP67 body ensures top performance in any environment. These meters are protected against dust and water intrusion from any direction.
Made to fit comfortably in your hand for on-the-go testing, the multilevel LCD display provides at-a-glance pH, EC/TDS, and temperature measurements from any angle and dual button operation streamlines the testing process for any user.
Quick Connect Probe
A Quick Connect DIN connector makes attaching and removing the probe simple and easy. The rubber coating protects the cable and provides a water-tight seal without twisting.
Your measurements require detailed attention; so should your electrode. The HI9814 Portable GroLine Meter features a replaceable HI1285-7 probe that has been carefully designed specifically for the pH, EC, and TDS analysis of hydroponic nutrient solutions.
The polypropylene body of the HI11285-7 houses all three sensors within a sturdy, single body design. The plastic body protects the electrode from damage, is easy to clean, and is chemically resistant to many aggressive chemicals.
Pre-Amplified pH Electrode
The pH sensor in the probe is a single junction electrode with gelled electrolyte and a retractable cloth junction. When readings appear sluggish, simply pull out some of the cloth material to renew the junction with a fresh surface.
Amperometric EC/TDS Sensor
The EC/TDS portion is a two-ring probe that comes with the HI9814, offering an accurate solution for low range EC and TDS readings. An integrated temperature probe ensures fast, accurately compensated readings even during sudden temperature fluctuations.
We believe that buying a meter should be simple. Your Portable GroLine Meter is equipped with everything you need for successful testing right out of the box. Your meter, probe, and accessories are all neatly packaged in a rugged carrying case to ensure that you have everything you need for on-the-go testing.
Quick Calibration Solution Sachets (3)
A single calibration solution for pH and conductivity makes calibration fast and ensures all of your measurements are accurate each time for better plant health and better yield. The single-use sachets are individually sealed so you use fresh buffer each time you calibrate.
Electrode Cleaning Solution for Agricultural Applications Sachets (3)
Your GroLine Combo Meter comes with cleaning solution that has been engineered to keep your electrode free from debris found in soils. This concentrated combination of detergents cleans your meter quickly and effectively so that your meter stays in optimum condition
-2.00 to 16.00 pH
automatic, at one or two points using standard buffers (pH 4.01, 7.01,10.01); one point calibration using quick calibration solution
pH Temperature Compensation
automatic ‐5.0 to 105.0 °C/23.0 to 221.0 °F
pH CAL Check (electrode diagnostics)
probe condition indicator
pH Sensor Check
±825 mV (pH‐mV)
1 mV (pH‐mV)
±1 mV (pH‐mV)
0.00 to 6.00 mS/cm
automatic, one-point at 1.41 mS/cm; one-point calibration using quick calibration solution
0 to 3000 ppm (500 CF); 0 to 3990 ppm (700 CF)
10 ppm (mg/L)
EC/TDS Temperature Compensation
Temperature Correction Coefficient
β = 1.9%/°C
EC to TDS Conversion Factor
0.5 (500 ppm) or 0.7 (700 ppm)
‐5.0 to 105.0 °C; 23.0 to 221.0 °F
0.1 °C; 0.1 °F
±0.5 °C; ±1.0 °F
HI1285-7 pH/conductivity probe with built-in temperature sensor, quick connect DIN connector and 1 m (3.3’) cable
user selectable: after 8 min, 60 min or disabled
1.5V (3) AAA / approximately 600 hours of continuous use
0 to 50 °C (32 to 122 °F) RH max. 100%
154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
196 g (6.91 oz.)
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), calibration certificates for both meter and probe and instructions.