One quick glance is all it takes.
A large clear LCD displays all of your essential readings so you know what your hydroponic nutrients solution is doing 24/7. High and low alarms flash warning you if something needs adjusting.
Monitor changes over time.
The GroLine Monitor automatically logs your results every 15 minutes over the last 30 days. Minimum, maximum, and average values are stored so you can recognize when patterns arise and help prevent future problems.
One probe. Three measurements.
Our 3-in-1 pre-amplified inline probe measures pH, EC/TDS, and temperature in a single, durable, polypropylene body making the GroLine Monitor easy to handle and easy to set up. The HI1285-9 has a 3/4” threaded connection for insertion into a pipe for flow through monitoring.
Quick Cal for less maintenance.
A single calibration solution for pH and conductivity makes calibration fast and ensures all of your measurements are accurate all of the time for better plant health and better yield.
Professional level accuracy.
Advanced algorithms and greater pH and TDS/ppm accuracy ensure operational consistency and a finer understanding of your plant’s nutritional needs.
Measure like a pro.
Our GroLine Monitor is made by growers and scientists alike who are committed to helping you take your growing operation to the next level.
3 sensors combined in a single rugged probe body made for continous immersion up to 2 meters: pH electrode with renewable cloth junction, amperometric EC/TDS sensor, and an internal temperature sensor for temperature compensated readings
IP65 rated enclosure: designed to withstand harsh grow environments
Wide pH Range: measure pH from 0.00 to 14.00 pH
Selectable EC to TDS/ppm conversion factor: choice of either a 0.5 or 0.7 conversion factor
- Automatic Temperature Compensation: all readings are compensated for variations in temperature, temperature displayed in oC or oF along with pH, EC or TDS reading
Large LCD with plant-friendly green backlighting: LCD can display all three essential hydroponic nutrient measurements at one time, a 3-second cycle of single measurements, or a real-time graph screen with options for measurement selection and log recall
Data logging for 30 days: logs every 15 minutes for last 30 days, stores min, max, and average values
Data transfer: USB-C port for easy data transfer to memory stick or PC
- High and low alarms: warns when your nutrient solution is out of desired range by flashing display and message
- Ambient light sensor: for automatic LCD dimming
pH Range 0.00 to 14.00 pH pH Resolution 0.01 pH, (0.1 pH) pH Accuracy (@25ºC/77ºF) ±0.05 pH, (± 0.1 pH) pH Calibration one or two-point calibration (using pH 4.01,7.01, 10.01 buffers) using auto buffer recognition; one-point calibration using quick calibration solution Temperature Compensation automatic (0.0 to 60.0ºC/ 32.0 to 140.0°)
Conductivity (EC/TDS) Specifications
EC Range 0.00 to 10.00 mS/cm EC Resolution 0.01 mS/cm EC Accuracy ±0.1mS/cm (0.00 to 5.00mS/cm); ±0.2mS/cm (5.00 to 10.00mS/cm) EC Calibration one-point at 1.41 mS/cm or 5.00 mS/cm using auto standard recognition; one-point calibration using quick calibration solution EC/TDS Temperature Compensation automatic with β set at 1.9%/°C TDS Range 0 to 5000 ppm (TDS conversion factor 0.5 (500 CF)); 0 to 7000 ppm (TDS conversion factor 0.7 (700 CF)) TDS Resolution 10 ppm 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
Display 128 x 64 pixel B/W LCD with green backlight Connectivity USB Type-C IP Rating IP65 Alarms High and Low with enable/disable option for all parameters Log Feature Automatic logging for last 30 days at 15 minute interval GLP Good Laboratory Practice with last 5 pH and EC calibration history Probe HI1285-9 triple junction inline pH/EC/TDS temperature PVC body, pre-amplified multiparameter probe with internal temperature sensor, DIN connector, 3 m (9.8’) cable Power Supply 12VDC adapter (included) Environment -5 to 50°C (23 to 122°F); RH max 95% non-condensing Dimensions 125 x 185 x 38 mm (4.92 x 7.28 x 1.49”) Weight 333g ( 11.7oz.) Ordering Information HI981421-01 (115V) is supplied with HI1285-9 multiparameter probe, Quick Cal buffer solution sachets (2), HI700661 electrode cleaning solution sachets for agriculture (2), 12VDC power adapter, quality certificates and instruction manual. Warranty 2 years (probe 6 months)
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