ActiveAir Indoor-Outdoor Thermometer w/Hygrometer

The large display shows current temperature and humidity levels, and includes a remote probe for second zone temperature. Records high and low points for both temperature and humidity.

(ECO 2371) - $17.95

ActiveAir Hygro-Thermometer

This large number LCD display is visible from a distance. Very accurate and hangs or mounts on a wall surface.

(ECO 2370) - $19.75

Hanna Combo Meter

The HI9813 is a rugged all around waterproof meter for easy pH / EC / TDS measurements. The HI 9813-6 has an added Cal-Check feature that can access the calibration status of the probe in seconds. 

HI 9813-0 (ECO 5528B) - $208.60
(normally ships in 1-5 days)

With Cal-Check
HI 9813-6 (ECO 5528A) - $231.00
(normally ships in 1-5 days)

Hanna Dual Grochek

 The HI 991404 continuously monitors pH / EC / TDS / Temp. in your nutrients. Comes with a rugged, non-clogging pH electrode and conductivity probe that will stand up to the most aggressive environments. Dual-level backlit LCD.

(ECO 5422D) - $166.60
(normally ships in 1-5 days)

Hanna Dual Grochek

 The HI 981404N is ideal for hydroponic applications where pH and TDS levels need to be continuously monitored. These wall mount monitors feature a large, easy-to-read LCD that displays pH and TDS readings simultaneously.

(ECO 5422C) - $163.80
(normally ships in 1-5 days)

Hanna TriMeter

The HI 981504 is designed for continuous monitoring of pH, TDS and Temp. Simple to install, readings can be viewed simultaneously on 3 backlit LCDs which can be easily viewed at a distance - even in low light.

(ECO 5529A) - $184.80
(normally ships in 1-5 days)

Hanna Instruments 98129 Combo pH/EC/TDS/Temperature Tester with Low Range EC

The combo waterproof testers offer the highest accuracy in measurements with a single tester. Will measure pH / EC / TDS and temperature.

(ECO 5529C) - $165.20
(normally ships in 1-5 days)

Hanna Soil Test Pen

 The HI 98331 takes quick and accurate readings directly in soil. It is the only meter available that will take conductivity readings directly from the soil without creating a soil solution for testing. The meter also measures temperature and the conductivity readings are compensated for temperature with the sensor incorporated into the probe.

(ECO 5523A) - $115.50
(normally ships in 1-5 days)

Hanna 98107 pHep 1 Pen

pHep 1 the standard in pH measurement with 0.1 pH accuracy. Has 2-point calibration, large LCO, and 700 hours of battery life. One year warranty.

(ECO 5523) - $56.62
(normally ships in 1-5 days)

Hanna 98128 pHep 5 Pen

pHep 5 is the most advanced pH tester on the market today. Has a pH readout of 0.01, automatic shutoff, replaceable pH electrode cartridge, stability indicator and automatic calibration. 1 year warranty.

(ECO 5522C) - $102.00
(normally ships in 1-5 days)

Replacement Probe (ECO 5522D) - $54.80
(normally ships in 1-5 days)

Hanna 98300 Dist 1 Pen

Dist 1 are reliable, pocket-sized instruments that will give you quick and accurate readings of TDS. Comes complete with protective cap, screwdriver, batteries and instructions. One year warranty.

(ECO 5524) - $59.25
(normally ships in 1-5 days)

Hanna 98311 Dist 5 Pen

Dist 5 will accurately measure EC and TDS. Features include replaceable electrode, adjustable TDS ratio, temperature in °C or of, automatic temperature compensation, battery level indicator and automatic shutoff. 2 year warranty.

(ECO 5522A) - $114.00
(normally ships in 1-5 days)

Replacement Probe (ECO 5522E) - $54.80
(normally ships in 1-5 days)

2-Way Moisture/pH Meter

Gardeners can conveniently test their moisture, and pH levels with the handy ActiveAir 2-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist), and pH readings between pH 0 (acidic) and pH 10 (basic) are represented. The durable, easy-to-read tester is suitable for indoors or out and needs no batteries to operate.

(ECO 2373) - $7.45
(normally ships in 1-5 days)

DO NOT LEAVE IN SOIL.
CLEAN PRONGS AFTER EACH USE

ActiveAir 3 - Way Meter

 Gardeners can conveniently test their moisture, light, and pH levels with the handy ActiveAir 3-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist), light readings range from 0 (low light) to 2000 (very strong light), and pH readings between pH 0 (acidic) and pH 10 (basic) are represented. The durable, easy-to-read tester is suitable for indoors or out and needs no batteries to operate.

(ECO 2374) - $9.45
(normally ships in 1-5 days)

DO NOT LEAVE IN SOIL.
CLEAN PRONGS AFTER EACH USE.

Pro pH Test Kit

This handy kit is included with our larger garden systems. A simple measurement of nutrient solution will give pH accuracy within .5. Includes a color scale, test vial and indicator solution.

(ECO 5519) - $5.65
(normally ships in 1-5 days)