HI98118

GroLine Waterproof Hydroponic pH Tester

$99.99

The GroLine HI98118 pH/temperature tester is our latest pocket meter for measuring the pH of a hydroponic nutrient solution. This modern looking meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. The HI98118 has a very large easy to read LCD display that 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.

Two-Button Operation
Quick Calibration Mode using Hanna Quick Cal pH/EC Calibration Solution
Cloth junction providing a larger surface area than a standard ceramic junction

Learn More

Thank you for your interest in our products. A representative will contact you within the next business day.

The HI98118 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 maximize 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 HI98118 can be used to measure the pH in soils as well as nutrient solutions. The North Carolina State University has outlined a procedure known as Pour Through Sampling Method. This method is used for container plants in which 50 ml of leachate is collected from a thoroughly watered plant and then tested.

To measure the pH of soil as a slurry the USDA recommends 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 HI98118 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 customize the meter to their preference. Customization 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 HI98118 features a 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. A cloth or fiber wick juction provides a larger surface area than a standard ceramic junction.

Features at-a-glance

Built in temperature sensor for Automatic Temperature Compensated measurements.
Cloth junction providing a larger surface area than a standard ceramic junction.
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. The standard can also be used to calibrate conductivity meters to 5,000 μS/cm .
Battery % level remaining displayed at start up.
Low battery indicator that is displayed when less than 10% battery life is remaining.

Optimum pH Levels for Plants

Vegetable Plants	Optimal pH	Garden/Flower Plants	Optimal pH	Orchard Plants	Optimal pH
Artichoke	6.5-7.5	Acacia	6-8	Apple	5-6.5
Asparagus	6-8	Acanthus	6-7	Apricot	6-7
Barley	6-7	Amaranth	6-6.5	Apricot	6-7
Bean	6-7.5	Bougainvillea	5.5-7.5	Cherry	6-7.5
Brussels Sprout	6-7.5	Dahlia	6-7.5	Grapefruit	6-7.5
Corn (Maize)	6-7.5	Erica	4.5-6	Grapevine	6-7
Cucumber	5.5-7.5	Euphorbia	6-7	Lemon	6-7
Early carrot	5.5-7	Fuchsia	5.5-7.5	Nectarine	6-7.5
Early Potato	4.5-6	Gentian	5-7.5	Orange	5-7
Egg Plant	5.5-7	Gladiolus	6-7	Peach	6-7.5
Late carrot	5.5-7	Hellebore	6-7.5	Pear	6-7.5
Late Potato	4.5-6	Hyacinth	6.5-7.5	Plum	6-7.5
Lettuce	6-7	Iris	5-6.5	Pomegranate	5.5-6.5
Melon	5.5-6.5	Juniper	5-6.5	Walnut	6-8
Oat	6-7	Ligustrum	5-7.5
Onion	6-7	Magnolia	5-6
Pea	6-7.5	Narcissus	6-8.5
Pepper	6-7	Oleander	6-7.5
Pumpkin	5.5-7.5	Paulownia	6-8
Rice	5-6.5	Portulaca	5.5-7.5
Soybean	5.5-6.5	Primula	6-7.5
Spinach	6-7.5	Rhododendron	4.5-6
Strawberry	5-7.5	Roses	5.5-7
String Beans	6-7.5	Sedum	6-7.5
Sugar beet	6-7	Sunflower	6-7
Sunflower	6-7.5	Tulip	6-7
Sweet Potato	5.5-6	Viola	5.5-6.5
Tomato	5.5-6.5
Watermelon	5.5-6.5
Wheat	6-7

Resources

Specifications

Specification Name	Detail
SKU	HI98118
pH Ranges	0.00 to 14.00 pH
pH Resolution	0.01 pH
pH Accuracy (@25°C/77°F)	±0.2 pH
pH Calibration	automatic, one or two-points (pH 4.01, 7.01, 10.01); one-point calibration using HI5036 or HI50036P Quick Cal calibration solution
pH Temperature Compensation	automatic, 0 to 50°C (32 to 122°F)
Temperature Range	0.0 to 50.0°C/32.0 to 122.0°F
Temperature Resolution	0.1°C/0.1°F
Temperature Accuracy	±0.5°C/±1°F
Automatic Shut-Off	8 minutes, 60 minutes, or can be disabled
Battery Type / Life	CR2032 Li-ion / approximately 1000 hours of continuous use
Environment	0 to 50°C (32 to 122°F); RH 100% max
Dimensions	160 x 40 x 17 mm (6.3 x 1.6 x 0.7’’)
Weight	75 g (2.6 oz.)
Ordering Information	HI98118 GroLine pH tester, Quick Cal calibration sachets (3), electrode cleaning solution sachet, battery, instruction manual and quality certificate.
Warranty	1 year

Product Manuals

IST98118_07_21 Download

GroLine Waterproof Hydroponic pH Tester

Features at-a-glance

Optimum pH Levels for Plants

Resources

Keep extra testing supplies on-hand

GroLine Waterproof Hydroponic pH Tester - HI98118 Reviews