Meters-

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Active Air Hygro-Thermometer

Active Air Hygro-Thermometer

Hydrofarm

$26.95
Bluelab Commercial Truncheon® Nutrient Meter

Bluelab Commercial Truncheon® Nutrient Meter

Bluelab

$176.95
Bluelab pH Pen

Bluelab pH Pen

Bluelab

$136.95
Bluelab Replacement Probe- Combo Probe

Bluelab Replacement Probe- Combo Probe

Bluelab

$85.95
Bluelab Soil Replacement Probe

Bluelab Soil Replacement Probe

Bluelab

$119.95
Bluelab® 2.77 EC Conductivity Standard Solution

Bluelab® 2.77 EC Conductivity Standard Solution

Hawthorne Gardening co.

From
$11.95
Bluelab® Combo Meter

Bluelab® Combo Meter

Bluelab

$388.95
Bluelab® Conductivity Pen

Bluelab® Conductivity Pen

Bluelab

$119.95
Bluelab® Multimedia pH Meter with Leap™ pH Probe

Bluelab® Multimedia pH Meter with Leap™ pH Probe

Bluelab

$329.95
Bluelab® pH 4.0 Calibration Solution

Bluelab® pH 4.0 Calibration Solution

Hawthorne Gardening co.

From
$14.95
Bluelab® pH 7.0 Calibration Solution

Bluelab® pH 7.0 Calibration Solution

Hawthorne Gardening co.

From
$14.95
Bluelab® pH Probe KCI Storage Solution

Bluelab® pH Probe KCI Storage Solution

Hawthorne Gardening co.

From
$18.95
Bluelab® Probe Care Kit pH

Bluelab® Probe Care Kit pH

Bluelab

$25.95
Bluelab® Probe Care Kit pH & Conductivity

Bluelab® Probe Care Kit pH & Conductivity

Bluelab

$31.95
Bluelab® Soil pH Pen

Bluelab® Soil pH Pen

Bluelab

$260.95
Compost Thermometer

Compost Thermometer

Down to Earth Distributors

$31.95
General Hydro pH Control Kit

General Hydro pH Control Kit

Sparetime Supply

$19.95
General Hydroponics® Meter Calibration Solution 4.01 General Hydroponics® Meter Calibration Solution 4.01

General Hydroponics® Meter Calibration Solution 4.01

Hawthorne Gardening co.

From
$8.95
General Hydroponics® Meter Calibration Solution 7.01 General Hydroponics® Meter Calibration Solution 7.01

General Hydroponics® Meter Calibration Solution 7.01

Hawthorne Gardening co.

From
$8.95
GH pH Test Indicator 8 oz

GH pH Test Indicator 8 oz

Paradise Superstore

$11.95
Grower's Edge® Large Display Digital Thermometer & Hygrometer

Grower's Edge® Large Display Digital Thermometer & Hygrometer

Hawthorne Gardening co.

$26.95
Hanna 1382 mg/L (ppm) TDS Calibration Solution 500mL

Hanna 1382 mg/L (ppm) TDS Calibration Solution 500mL

Hanna Instruments

$19.95
Hanna 1413 µS/cm Conductivity Standard 230mL

Hanna 1413 µS/cm Conductivity Standard 230mL

Hanna Instruments

$17.95
Hanna Cleaning Solution for Soil Deposits 20 mL Sachets

Hanna Cleaning Solution for Soil Deposits 20 mL Sachets

Hanna Instruments

$2.25