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    $99.95
    Bluelab Ph Pen - ± 0.1 Ph Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made In NZ
    Amazon.com
    5K+
    Free shipping
    $99.95
    Bluelab Ph Pen - ± 0.1 Ph Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made In NZ
    Amazon.com
    5K+
    $399.00
    Bluelab Guardian Monitor Wi-Fi For Real-Time Ph, Temperature, And Conductivity (TDS) Measurements In Water With Calibration, 3 in 1 Digital Nutrient
    Amazon.com
    702
    Free shipping
    $399.00
    Bluelab Guardian Monitor Wi-Fi For Real-Time Ph, Temperature, And Conductivity (TDS) Measurements In Water With Calibration, 3 in 1 Digital Nutrient
    Amazon.com
    702
    $109.99
    Bluelab Ph Pen Meter And Probe Care Kit Ph With Calibration Supplies, Storage Solution & Brush, Reliable Digital Tester For Ph, Temperature In
    Amazon.com
    4K+
    Free shipping
    $109.99
    Bluelab Ph Pen Meter And Probe Care Kit Ph With Calibration Supplies, Storage Solution & Brush, Reliable Digital Tester For Ph, Temperature In
    Amazon.com
    4K+
    $249.99
    Bluelab Combo Meter For Ph, Temperature & Conductivity In Water - Easy Calibration, Digital EC/TDS/PPM Tester For Hydroponics & Indoor Plants
    Amazon.com
    16
    Free shipping
    $249.99
    Bluelab Combo Meter For Ph, Temperature & Conductivity In Water - Easy Calibration, Digital EC/TDS/PPM Tester For Hydroponics & Indoor Plants
    Amazon.com
    16
    $189.99
    Bluelab PENSTP Ph And Conductivity Starter Pack - Precision Nutrient Solution Management Kit With Temperature Measurement, Waterproof Pens, And
    Amazon.com
    1K+
    Free shipping
    $189.99
    Bluelab PENSTP Ph And Conductivity Starter Pack - Precision Nutrient Solution Management Kit With Temperature Measurement, Waterproof Pens, And
    Amazon.com
    1K+
    $912.95
    $1,022.50
    MSE PRO Laboratory Benchtop High Precision Ph/Ion Meter Pack, Laboratory Benchtop High Precision Ph/Ion Meter Main Device
    MSE Supplies
    10% off
    $912.95
    $1,022.50
    MSE PRO Laboratory Benchtop High Precision Ph/Ion Meter Pack, Laboratory Benchtop High Precision Ph/Ion Meter Main Device
    MSE Supplies
    $169.43
    Bluelab PENSOILPH Soil Ph Pen, Digital Meter And Water Test Kit, Also Used For Coco And Rockwool With Easy Calibration For Hydroponic System And
    Amazon.com
    962
    Free shipping
    $169.43
    Bluelab PENSOILPH Soil Ph Pen, Digital Meter And Water Test Kit, Also Used For Coco And Rockwool With Easy Calibration For Hydroponic System And
    Amazon.com
    962
    $21.99
    Digital Ph Meter Tester Pen With 3 Calibration Powders, 0.01 Accuracy, Pocket Size, LCD Display For Household Drinking, Pool And Aquarium
    Amazon.com
    2K+
    $21.99
    Digital Ph Meter Tester Pen With 3 Calibration Powders, 0.01 Accuracy, Pocket Size, LCD Display For Household Drinking, Pool And Aquarium
    Amazon.com
    2K+
    $227.04
    NANBEI Lab Portable Ph Meter, 200 Sets Of Data Storage,1-3Points Auto Calibration,0.01 Ph Accuracy,Professional Ph/Temp/ORP Test,3.5 Inch High
    Amazon.com
    1
    Free shipping
    $227.04
    NANBEI Lab Portable Ph Meter, 200 Sets Of Data Storage,1-3Points Auto Calibration,0.01 Ph Accuracy,Professional Ph/Temp/ORP Test,3.5 Inch High
    Amazon.com
    1
    $420.00
    Apera Instruments PH700-SA Benchtop Lab Ph Meter For Strong Alkaline Solutions And/Or High Salinity Solutions
    Amazon.com
    153
    Free shipping
    $420.00
    Apera Instruments PH700-SA Benchtop Lab Ph Meter For Strong Alkaline Solutions And/Or High Salinity Solutions
    Amazon.com
    153
    $428.95
    $473.22
    Benchtop Ph-Mv Meter-0 To 14 Ph Range
    MSE Supplies
    $428.95
    $473.22
    Benchtop Ph-Mv Meter-0 To 14 Ph Range
    MSE Supplies
    $795.00
    Apera Instruments SX751 Ph/ORP/DO/Conductivity/TDS/Salinity/Resistivity/Portable Handheld Multiparameter Meter Kit, Silver
    Amazon.com
    20
    Free shipping
    $795.00
    Apera Instruments SX751 Ph/ORP/DO/Conductivity/TDS/Salinity/Resistivity/Portable Handheld Multiparameter Meter Kit, Silver
    Amazon.com
    20
    $262.04
    Apera Instruments, LLC-AI501 PH700 Benchtop Lab Ph Meter, 0.01 Ph Accuracy, 1-3 Points Auto Calibration, 3-In-1 Ph/Temp. Electrode
    Amazon.com
    150
    Free shipping
    $262.04
    Apera Instruments, LLC-AI501 PH700 Benchtop Lab Ph Meter, 0.01 Ph Accuracy, 1-3 Points Auto Calibration, 3-In-1 Ph/Temp. Electrode
    Amazon.com
    150
    $189.93
    Bluelab Soil Ph Pen And Probe Care Kit Ph Bundle With Calibration Supplies, Storage Solution, Brush, Reliable Meter And Digital Tester For Testing
    Amazon.com
    Free shipping
    $189.93
    Bluelab Soil Ph Pen And Probe Care Kit Ph Bundle With Calibration Supplies, Storage Solution, Brush, Reliable Meter And Digital Tester For Testing
    Amazon.com
    Free shipping
    $387.95
    $434.50
    MSE PRO Laboratory Handheld Economy Compact Ph Meter
    MSE Supplies
    10% off
    $387.95
    $434.50
    MSE PRO Laboratory Handheld Economy Compact Ph Meter
    MSE Supplies
    $70.65
    $114.80
    Bluelab Multimedia Ph Meter (Leap Probe Included)
    Altakorea.com
    38% off
    $70.65
    $114.80
    Bluelab Multimedia Ph Meter (Leap Probe Included)
    Altakorea.com
    $399.78
    Apera Instruments AI521 PH800 Laboratory Benchtop Ph Meter Kit, 0.01 Ph Accuracy, GLP Data Management (USB Output), BNC Connector
    Amazon.com
    13
    Free shipping
    $399.78
    Apera Instruments AI521 PH800 Laboratory Benchtop Ph Meter Kit, 0.01 Ph Accuracy, GLP Data Management (USB Output), BNC Connector
    Amazon.com
    13
    $145.94
    Oakton 35423-01 Ecotestr Ph. 2+ Pocket Ph. Meter, 1.2" Height, 1.8" Wide, 6.4" Length, 1.2" Height, 1.8" Wide, 6.4" Length
    Amazon.com
    24
    Free shipping
    $145.94
    Oakton 35423-01 Ecotestr Ph. 2+ Pocket Ph. Meter, 1.2" Height, 1.8" Wide, 6.4" Length, 1.2" Height, 1.8" Wide, 6.4" Length
    Amazon.com
    24