General Hydroponics pH 7.0 Calibration Solution | 8oz

General Hydroponics pH 7.0 Calibration Solution | 8oz General Hydroponics uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH meters. General Hydroponics technicians check each batch to ensure that our...

Bluelab pH 7 Calibration Solution 500mL

Bluelab pH 7 Solution ensures that pH meters are giving accurate readings.

Bluelab pH 4 Calibration Solution 500mL

Bluelab pH 4 Calibration Solution 500mL

Bluelab 2.77 EC Conductivity Solution, 500 ml

The 2.77 EC Conductivity solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe. These solutions should be stored in a cool place out of direct sun and heat.

Bluelab pH 7 Calibration Solution 250mL

Bluelab pH 7 Solution ensures that pH meters are giving accurate readings.

General Hydroponics pH 4.01 Calibration Solution | 8oz

General Hydroponics pH 4.01 Calibration Solution | 8oz General Hydroponics uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH meters. General Hydroponics technicians check each batch to ensure that our...

Bluelab EC 2.77 Calibration Solution 250mL

Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab calibration and conductivity standard solutions are essential for use with all Bluelab products for the calibration of pH and testing the cleanliness of the...

Bluelab pH 4 Calibration Solution 250mL

Bluelab pH 4 Solution ensures that pH meters are giving accurate readings.

Hanna GroLine QuickCal Calibration Solution pH and EC Meters (230 ml)

HI5036-023 is a quick calibration solution for use with Hanna’s GroLine pH and/or EC/TDS meters. Using the Quick Cal function found in compatible meters allows for a single point calibration for pH and/or conductivity sensors. Each bottle has the...

Hanna Cleaning Solution 500ml

Proper maintenance is the key to ensuring the accuracy of any pH tester. Hanna Electrode Cleaning Solution, used at least once per week and as often as once per day, keeps dirt and contaminants from causing incorrect readings. It’s as simple as a...

Bluelab Care Kit pH ONLY

Bluelab Care Kit pH ONLY

Hanna GroLine 1.41 mS/cm EC Calibration Solution 230ml

HI7031-023 is a GroLine 1,413 µS/cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis. Hanna conductivity solutions have the lot number and expiration date...

Hanna GroLine Calibration Solution 20mL packet

HI50036P is a quick calibration solution for use with Hanna’s GroLine pH and/or EC/TDS meters. Using the Quick Cal function found in compatible meters allows for  a single point calibration for pH and/or conductivity sensors. Each sachet has...

Bluelab pH KCl Storage 250ml

Manufactured to high laboratory standards, Bluelab® pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and maximize the life of Bluelab pH pens and pH probes. For best...

Hanna GroLine Cleaning Solution 230ml

HI7061-023 is the Hanna GroLine general purpose cleaning solution that can be used for a variety of applications. Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer. Hanna's cleaning...

Bluelab pH/TDS Probe Care Kit

The instrument is only as accurate as the probe is clean. Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller. The probe surface is where the instrument takes the reading of the solution. If...

Hanna GroLine Storage Solution 230ml

Hanna GroLine Storage Solution 230ml for GroLine products 

Hanna GroLine pH 7.01 Solution 230ml

Hanna GroLine pH 7.01 Solution 230ml HI7007-023 is a high quality pH 7.01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the...

Hanna GroLine pH 4.01 Solution 230ml

Hanna GroLine pH 4.01 Solution 230ml: HI7004-023 is a high quality pH 4.01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on...

Bluelab pH Probe KCl Storage Solution 120ml

Bluelab pH Probe KCl Storage Solution 120ml