Calibration & Cleaning Solutions

A clean probe is an accurate probe. Cleaning the probe surface removes dirt or contamination. After cleaning, calibration (for pH probes) or testing (for conductivity probes) is needed. Cleaning and calibrating at least monthly will help maintain accurate readings. Accurate readings simplify crop management and provide improved growth.

To view our selection of pH adjusters (pH up and pH down), click here.

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Bluelab Probe Care Kit - pH and Conductivity Bluelab pH 4.0 Calibration Solution 250 ml Bluelab pH 4.0 Calibration Solution 500 ml
Bluelab Probe Care Kit - pH and ConductivityBluelab pH 4.0 Calibration Solution 250 mlBluelab pH 4.0 Calibration Solution 500 ml

Everything you need to maintain your pH and ppm meters.

For calibrating pH meters.

For calibrating pH meters.

$22.95

$21.99

$8.19

$7.99

$10.95

$10.39

Bluelab pH 7.0 Calibration Solution 20 ml Bluelab pH 7.0 Calibration Solution 250 ml Bluelab pH 7.0 Calibration Solution 500 ml
Bluelab pH 7.0 Calibration Solution 20 mlBluelab pH 7.0 Calibration Solution 250 mlBluelab pH 7.0 Calibration Solution 500 ml

For calibrating pH meters.

For calibrating pH meters.

For calibrating pH meters.

$2.00

$1.79

$8.19

$7.99

$10.95

$10.39

Bluelab pH Probe KCI Storage Solution 100 ml Bluelab 2.77 EC Conductivity Solution 250 ml Bluelab Calibration Solution 27.7CF/EC2.77 250 ml
Bluelab pH Probe KCI Storage Solution 100 mlBluelab 2.77 EC Conductivity Solution 250 mlBluelab 2.77 EC Conductivity Solution, 250 ml

Used to hydrate and store pH meters.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$11.95

$11.29

$8.19

$7.99

$8.16

$7.99

General Hydroponics pH 4.01 Calibration Solution 8 oz General Hydroponics pH 4.01 Calibration Solution 1 qt General Hydroponics pH 7.0 Calibration Solution 1 qt
General Hydroponics pH 4.01 Calibration Solution 8 ozGeneral Hydroponics pH 4.01 Calibration Solution 1 qtGeneral Hydroponics pH 7.0 Calibration Solution 1 qt

For calibrating pH meters.

For calibrating pH meters.

For calibrating pH meters.

$7.54

$7.19

$21.50

$19.99

$21.50

$19.99

General Hydroponics pH 7.0 Calibration Solution 8 oz General Hydroponics 1500 ppm Calibration Solution 8 oz General Hydroponics 1500 ppm Calibration Solution 1 qt
General Hydroponics pH 7.0 Calibration Solution 8 ozGeneral Hydroponics 1500 ppm Calibration Solution 8 ozGeneral Hydroponics 1500 ppm Calibration Solution 1 qt

For calibrating pH meters.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$7.54

$7.19

$8.20

$7.89

$21.50

$19.99

Hanna Instruments Cal Check Solution Hanna Instruments pH 4.01 Calibration Solution 20 mL Hanna Instruments pH 4.01 Calibration Solution 500 mL
Hanna Instruments Cal Check SolutionHanna Instruments pH 4.01 Calibration Solution 20 mLHanna Instruments pH 4.01 Calibration Solution 500 mL

For use with HI98136

For calibrating pH meters.

For calibrating pH meters.

$1.80

$1.76

$2.00

$1.89

$18.95

$17.99

Hanna Instruments pH 7.01 Calibration Solution 20 mL Hanna Instruments pH 7.01 Calibration Solution 500 mL Hanna Instruments Storage Solution, 16 oz
Hanna Instruments pH 7.01 Calibration Solution 20 mLHanna Instruments pH 7.01 Calibration Solution 500 mLHanna Instruments Storage Solution, 16 oz

For calibrating pH meters.

For calibrating pH meters.

Used to hydrate and store pH meters.

$2.00

$1.89

$18.95

$17.99

$18.95

$17.99

Hanna Instruments 12880 mS/cm EC Solution 20 mL Hanna Instruments 12880 mS/cm EC Solution 230 mL Hanna Instruments 1413 mS/cm EC Solution 20 mL
Hanna Instruments 12880 mS/cm EC Solution 20 mLHanna Instruments 12880 mS/cm EC Solution 230 mLHanna Instruments 1413 mS/cm EC Solution 20 mL

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$1.40

$1.29

$15.99

$14.99

$1.40

$1.29

Hanna Instruments 1413 mS/cm EC Solution 230 mL Hanna Instruments Calibration Solution 1380 ppm, 2 oz Hanna Instruments 1382 ppm TDS Solution 20 mL
Hanna Instruments 1413 mS/cm EC Solution 230 mLHanna Instruments Calibration Solution 1380 ppm, 2 ozHanna Instruments 1382 ppm TDS Solution 20 mL

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$15.95

$14.99

$5.98

$5.79

$1.40

$1.29

Hanna Instruments 1382 ppm TDS Solution 230 mL Hanna Instruments 1382 ppm TDS Solution 460 mL Hanna Instruments 1500 ppm TDS Solution 20 mL
Hanna Instruments 1382 ppm TDS Solution 230 mLHanna Instruments 1382 ppm TDS Solution 460 mLHanna Instruments 1500 ppm TDS Solution 20 mL

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$15.95

$14.99

$18.95

$17.99

$1.40

$1.29

Hanna Instruments 1500 ppm TDS Solution 230 mL Hanna Instruments 1500 ppm TDS Solution 16 oz Hanna Instruments Electrode Cleaner 16 oz
Hanna Instruments 1500 ppm TDS Solution 230 mLHanna Instruments 1500 ppm TDS Solution 16 ozHanna Instruments Electrode Cleaner, 16 oz

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

General purpose electrode cleaner.

$14.95

$13.99

$18.95

$17.99

$18.95

$17.99

HM Digital 1000ppm Calibration Solution HM Digital PH/ORP Storage Solution Milwaukee Instruments pH 4.01 Solution 20ml
HM Digital 1000ppm Calibration SolutionHM Digital PH/ORP Storage SolutionMilwaukee Instruments pH 4.01 Solution 20ml

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used to hydrate and store pH meters.

For calibrating pH meters.

$6.50

$6.39

$6.95

$6.89

$1.04

$0.99

Milwaukee Instruments pH 4.01 Solution, 220ml Milwaukee Instruments pH 7.0 Solution 20ml Milwaukee Instruments pH 7.0 Solution, 220ml
Milwaukee Instruments pH 4.01 Solution, 220mlMilwaukee Instruments pH 7.0 Solution 20mlMilwaukee Instruments pH 7.0 Solution, 220ml

For calibrating pH meters.

For calibrating pH meters.

For calibrating pH meters.

$11.95

$11.89

$1.04

$0.99

$11.95

$11.89

Milwaukee Instruments EC Solution 1413 Milwaukee Instruments 1500 PPM Packet Milwaukee Instruments TDS Solution 1382 20 ml
Milwaukee Instruments EC Solution 1413Milwaukee Instruments 1500 PPM PacketMilwaukee Instruments TDS Solution 1382 20 ml

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$1.04

$0.99

$1.04

$0.99

$1.04

$0.99

Milwaukee Instruments 1382 PPM Solution 220ml Nutradip Tri Calibration Kit Oakton pH 4.01 Solution 20 ml
Milwaukee Instruments 1382 PPM Solution 220mlNutradip Tri Calibration KitOakton pH 4.01 Solution 20 ml

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

Includes pH and EC calibration solutions.

For calibrating pH meters.

$11.95

$11.79

$19.95

$19.69

$2.30

$2.19

Oakton pH 4.01 Solution 500ml Oakton pH 7.00 Solution 500 ml Oakton 1413 US Solution 500 ml
Oakton pH 4.01 Solution 500mlOakton pH 7.00 Solution 500 mlOakton 1413 US Solution 500 ml

For calibrating pH meters.

For calibrating pH meters.

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

$18.95

$18.49

$18.95

$18.49

$18.95

$18.49

Oakton Calibration Solution 15,000 uS 20 ml Hydroponic Essentials pH 4.01 Calibration Solution 8oz Hydroponic Essentials pH 4.01 Calibration Solution Qt
Oakton Calibration Solution 15,000 uS 20 mlHydroponic Essentials pH 4.01 Calibration Solution 8ozHydroponic Essentials pH 4.01 Calibration Solution Qt

Used as a reference or checking solution to ensure proper operation and adequately cleaned EC/CF probe.

For calibrating pH meters.

For calibrating pH meters.

$2.30

$2.19

$7.95

$7.69

$19.95

$19.29

Hydroponic Essentials pH 7.0 Calibration Solution 8oz Hydroponic Essentials pH 7.0 Calibration Solution Qt
Hydroponic Essentials pH 7.0 Calibration Solution 8ozHydroponic Essentials pH 7.0 Calibration Solution Qt

For calibrating pH meters.

For calibrating pH meters.

$7.95

$7.69

$19.95

$19.29

1 - 53 of 53 items