+44 (0)1525 850 855
Order before 4pm for same day dispatch Weekdays only
HI-98118 GroLine Waterproof Hydroponic pH & Temperature Tester

In Stock 12 Items available


The HI-98118 Hydroponic Tester is a pocket-sized solution for measuring pH in hydroponic environments. This robust and accurate handheld pH meter for water allows you to quickly gain insight into the pH of your water. A large, clear digital readout and fast results makes this pH pen shaped tester the best option for reading pH in comparison to colour-matching test kits.

A simple, two-button result and built-in temperature sensor make the HI-98118 portable pH reader a practical and precise solution for all kinds of hydroponics environments and growing setups.

0.00 to 14.00 pH

£74.60 (exc.VAT)
£89.52 (tax incl.)
Full Description Specification Manuals

The HI-98118 pH/temperature tester is our latest pocket meter for measuring the pH of a hydroponic nutrient solution. The ergonomic design allows this tester to fit comfortably in your hand. The large easy to read LCD display shows both pH and temperature along with calibration, stability and low battery indicators. All operations are simplified to two buttons. One is for turning the meter on/off and the other for automatic one or two point calibration.

This GroLine pocket pH Tester is an affordable way to measure the pH of hydroponic nutrient solutions. The maintaining of an optimal pH is essential to maximise optimum growth. The general rule of thumb is that as pH increases the solubility of minerals and nutrients decrease. It is important that nutrients are soluble for plants to uptake and use for growth. The pH of nutrient solution can also affect the bacteria that fix nitrogen for the plant to use. Every plant has optimum pH levels for growth. Below is a table for the ideal pH range for a variety of plants.

The HI-98118 can be used to measure the pH in soils as well as nutrient solutions. To measure the pH of soil as a slurry it is recommended to use a mixture of 1 part soil to 1 part water. The slurry is allowed to rest for 10 minutes so that the solids will settle out and the pH of liquid above can be measured.

The HI-98118 is an advanced meter while maintaining simplicity. The front of the meter has two buttons. One is for turning the meter on and off while the other is used to enter the calibration mode. There is a third button in the battery compartment that allows the user to customise the meter to their preference. Customisation includes temperature readout in oC or oF, automatic shut off selectable from 8 minutes, 60 minutes or disabled, and lastly the choice of using Hanna's Quick Cal pH/EC standard or traditional buffers values of pH 4.01, 7.01 and 10.01.

The electrode features a unique extractable cloth junction. The reference junction of a pH electrode, also known as a salt bridge, provides an electrical pathway between the internal reference cell and the sample. Any clogging of the junction will result in a disruption of the electrical pathway. When this happens the readings will be erratic and take a very long time to stabilise. With the Hanna extractable junction a small portion of 1/8" is extracted or pulled to expose a clean surface. With the junction renewed the clogging is cleared allowing the meter to still be used. The overall length of the junction is about 1" so the junction should only be extracted periodically.

Key Features

  • Built in temperature sensor for Automatic Temperature Compensated measurements
  • Renewable junction to clear any clogging that causes readings to drift and be erratic
  • Stability indicator that disappears once a stable reading is obtained
  • Automatic calibration to one or two points at a push of a button
  • Uses Hanna's Quick Cal pH/EC standard with a pH value of 6.86
  • Battery % level displayed at start up Low battery indicator that is displayed when less than 10% battery life is remaining

Read More

pH Range0.00 to 14.00 pH
pH Resolution0.01pH; 0.1°C
pH Accuracy±0.1pH/±0.5°C
pH Calibrationautomatic, at one or two points using standard buffers (pH 4.01, 7.01, 10.01); one point calibration using quick calibration solution
Temperature Compensationautomatic from 0 to 50°C
Battery Type/Life1.5V CR2032 (1) / approximately 1000 hours of continuous use
Environment0 to 50°C; RH max 100%
Dimensions160 x 40 x 17mm
Ordering InformationHI-98118 GroLine is supplied with protective cap, (3) HI-50036 Quick Cal calibration sachets (20ml), (1) cleaning solution sachet (20ml), (1) battery, instruction manual, and quality certificate
You will need:HI-70300-023 GroLine Storage solution 230ml for this meter. Buy separately. Also available 500ml and 120ml.

Similar Products