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HANNA HI981420 GroLine Hydroponic Nutrients Monitor for pH EC TDS and Temperature
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HANNA HI981420 GroLine Hydroponic Nutrients Monitor for pH, EC, TDS, and Temperature

Features at-a-glance


·         3 sensors combined in a single rugged probe body: 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; 0.0 to 14.0 pH

pH Resolution

0.01 pH; 0.1 pH

pH Accuracy

±0.05 pH; ± 0.1 pH

pH Calibration

one or two-point calibration (using pH4.01,7.01, 10.01 buffers) using auto buffer recognition; one-pointcalibration using quick calibration solution

pH Temperature Compensation

automatic (0.0 to 60.0ºC/ 32.0 to140.0°)


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/cmusing auto standard recognition; one-point calibration using quickcalibration solution

TDS Range

0 to 5000 ppm (TDS conversion factor0.5 (500 CF)); 0 to 7000 ppm (TDS conversion factor 0.7 (700 CF))

TDS Resolution

10 ppm

TDS Accuracy

±2% f.s.

EC/TDS Temperature Compensation


Temperature Correction Coefficient

β set at 1.9%/°C

EC to TDS Conversion Factor

TDS conversion factor 0.5 (500 CF);TDS conversion factor 0.7 (700 CF)



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


Alarm Relay Set Point

high and low with enable/disableoption for all parameters


Multi-parameter Probe

HI1285-8 pH/EC/TDS/temperaturepolypropylene body, pre-amplified multiparameter probe with internaltemperature sensor DIN connector and 2 m (6.6’) cable

Logging Type

automatic logging for last 30 days at15 minute interval


USB Type-C for flash drive orcompatible device


last 5 pH and EC calibrations


128 x 64 pixel B/W LCD with greenbacklight

Power Supply

12VDC adapter (included)


-5 to 50°C (23 to 122°F); RH max 95%non-condensing

IP Rating



125 x 185 x 38 mm (4.92 x 7.28 x1.49”)


333g ( 11.7oz.)

Ordering Information

HI981420 is supplied with: HI1285-8multi-parameter probe, HI50036-0 Quick Cal buffer solution sachet (2),HI700661P electrode cleaning solution sachets for agriculture (2), 12VDCadapter, calibration certificates for both meter and probe, and instruction manual.

Alat Laboratorium Umum

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