HI98168 Professional GroLine Portable Soil pH Meter

R 17,702.00 *

Prices excluded VAT and delivery costs

Delivery time approx. 2 to 4 weeks

  • HI98168
DESCRIPTION:   The HI98168 is a rugged, waterproof, portable pH meter that allows... more
Product information "HI98168 Professional GroLine Portable Soil pH Meter"

DESCRIPTION:  The HI98168 is a rugged, waterproof, portable pH meter that allows for the direct measure of soil pH. This meter is supplied with a specialized pH electrode that has a rugged conical tip for insertion in soil.

 The measurement of pH in agricultural activities is very important due to the influence it has on the growth of the plant. Soil can be acid, neutral or alkaline, according to its pH value. Most plants prefer a pH range from 5.5 to 7.5; but some species prefer more acid or alkaline soils. Nevertheless, every plant requires a particular range of pH, for optimum growth.


The HI12923 pH electrode that is supplied with the meter is uniquely designed with a conical tip and a triple ceramic junction for improved performance in soils that have a low moisture content. The probe has a built in amplifier to reduce noise from humidity that can effect the probe connection to the meter. The HI12923 connects to the HI98168 with a quick-connect, waterproof DIN connector, allowing for a secure, non-threaded attachment.


Besides being supplied with a unique pH electrode made for soil analysis, the HI98168 has the Hanna's unique CAL Check™ feature that alerts the user to potential problems during the calibration process. This is a very important since it is likely that the probe will be coated with soil. This coating can easily lead to errors in pH measurement.  By comparing previous calibration data to the current calibration, the meter will inform the user, with display prompts, when the probe needs to be cleaned, replaced, or if the pH buffer might be contaminated.  After calibration, the overall probe condition is displayed on screen as a percentage. The probe condition is affected by both the offset and slope characteristics of the pH electrode, both of which can be found in the GLP data including with the readings stored in the meter or transferred to a PC.  




·         Conical Tip  The conical tip is made of durable LT glass and allows for direct measurement in soils. In the case any rocks are present an auger is provided to make a hole for the probe.


·         Triple ceramic junction – The outer reference has three ceramic frits that allow electrolyte to flow at a high rate from the inside of the probe to the outside. A higher flow rate allows for a pH measurement of soil with low moisture.


·         Refillable- As electrolyte is lost over time it can be replenished to extend the life of the electrode.


·         Quick Connect DIN Connector – This secure waterproof connector allows for a single cable to be used for both pH and temperature measurements.


The HI98168 GroLine Potable pH meter for soil has many other advanced features including automatic calibration, automatic buffer recognition, calibrated buffer tags, stability indicator, log on demand of readings, USB for PC connectivity, low battery indicator, and selectable automatic shut off.  


Other features include:




·         WaterproofErgonomic, rugged, waterproof (IP67) design that can withstand harsh environments.


·         Automatic Calibration  - The HI98168 can be up to five points including with custom buffers. 

         The calibration buffers are automatically recognized and after calibration the buffer values used are shown      on the display.


·         Calibration Check

o   Alerts user to potential problems during calibration including when to clean electrode and possible buffer contamination

o   Displays overall condition of the pH electrode after calibration that is based on the offset and slope characteristics


·    GLP Data:  The GLP data can be reviewed at anytime including with logged reading. The calibration data includes date, time, pH calibration buffers, offset, and slope.


·     Dot Matrix LCD: The high contrast, graphic LCD screen is easy to view outdoors in bright sunlight as well as in low-lit areas with the backlight. A combination of dedicated and virtual keys allows for easy, intuitive meter operation in a choice of languages.

Supplied CompleteThe meter is supplied with a compact, durable HI720161 carrying case and is thermoformed to hold all necessary components for storage, including the meter and electrode, beakers, auger, soil preparation solution, buffer solutions, and cleaning solutions.

HI98168 Specifications

pH Range*

-2.0 to 20.0; -2.00 to 20.00; -2.000 to 20.000 pH

pH Resolution

0.1; 0.01; 0.001 pH

pH Accuracy

±0.1; ±0.01; ±0.002 pH

pH Calibration

up to five-point calibration, seven standard buffers available (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) and five custom buffers

mV Range

±2000 mV

mV Resolution

0.1 mV

mV Accuracy

±0.2 mV

Temperature Range

-20.0 to 120.0 °C (-4.0 to 248.0°F)

Temperature Resolution

0.1°C (0.1°F)

Temperature Accuracy

±0.4°C (±0.8°F) (excluding probe error)

Temperature Compensation

automatic or manual from -20.0 to 120.0 °C (-4.0 to 248.0°F)

pH Slope Calibration

from 80 to 110%


HI12923 refillable pH electrode with conical tip, internal temperature sensor, quick connect DIN connector and 1 m (3.3’ cable)

Input Impedance

1012 Ohms


log-on-demand up to 100 samples (100 pH/100 mV)

PC Connectivity

sealed opto-isolated USB connected to PC with micro USB cable and PC running HI92000 software

Battery Type/Life

1.5V AA (4) / approximately 200 hours of continuous use without backlight (50 hours with backlight)

Auto Off

user selectable: 5, 10, 30, 60 min or can be disabled


0 to 50°C (32 to 122°F); RH 100% (IP67)


185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)


400 g (14.2 oz.)


HI12923 Specifications


pre-amplified pH / temperature probe


single Ag/AgCl


triple ceramic with 40-50 ?l/hr. flow rate


KCl 3.5M + AgCl

Max Pressure

0.1 bar


pH: 0 to 12

Recommended Operating Temperature

-5 to 70°C (23 to 158°F) - LT



Temperature Sensor




Body Material



7-pole; 1 m (3.3’)


quick connect DIN



Measurement of soil and soil slurries.


HI98168 is supplied with HI12923 glass body pH electrode, HI7004M pH 4.01 buffer solution (230 mL), HI7007M pH 7.01 buffer solution (230 mL), HI7051M soil sample preparation solution (230 ml), HI700663 electrode cleaning solution for soil deposits sachet (1), HI700664 electrode cleaning solution for humus deposits sachet (1), HI 721319 ground auger (1), 100 mL plastic beaker (2), 1.5V AA batteries (4), HI92000 PC software, HI920015 micro USB cable, instruction manual with quick start guide, instrument quality certificate and HI720161 hard carrying case.





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