Meters & Solutions

  • pH Down  32oz
    Microbe Life Hydroponics

    pH Down 32oz

    Microbe Life Hydroponics pH DOWN is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. • Safely lowers pH levels• Combines 2 pH adjusters...
    $15.50
    $18.99
    $18.99
  • pH Up 32oz
    Microbe Life Hydroponics

    pH Up 32oz

    Microbe Life Hydroponics pH UP is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. • Safely raises pH levels• Combines 2 pH adjusters...
    $15.50
    $18.99
    $18.99
  • PH Tester w/1 Point Manual Cal
    Milwaukee Instruments

    PH Tester w/1 Point Manual Cal

    pH Tester with 1 point manual calibration, ± 0.2 pH accuracy, range: 0.0 pH to 14.0 pH. Full-range pH tester. 30-day warranty, snap-over protective case, 7.01 calibration solution, and calibration screwdriver are all included with unit.
    $27.80
    $32.99
    $32.99
  • pH Tester With 1 Point Manual Calibration
    Milwaukee Instruments

    pH Tester With 1 Point Manual Calibration

    DIGITAL. SIMPLE. COMPACT. Fast, accurate results with digital LCD readout Easy measurement: just place the probe in the sample, gently stir and wait for the reading to stabilize Simple one-point calibration with an easy-to-use trimmer located on the...
    $29.47
    $31.99
    $31.99
  • PH7 Solution, 220ml
    Milwaukee Instruments

    PH7 Solution, 220ml

    Available in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml leak-proof bottles and are recommended for lab application. Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open,...
    $13.38
    $14.35
    $14.35
  • PH4 Solution, 220ml
    Milwaukee Instruments

    PH4 Solution, 220ml

    Available in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 230 ml leak-proof bottles and are recommended for lab application. Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open,...
    $13.38
    $14.35
    $14.35
  • Digital Brix Refractometer Range - 0 to 85
    Milwaukee Instruments

    Digital Brix Refractometer Range - 0 to 85

    Digital Sugar Refractometer for general purpose with automatic temperature compensation (ATC).Range 0-85% Brix, resolution 0.1%, units come with battery.
    $170.93
    $199.99
    $199.99
  • Milwaukee Instruments EC40 EC/TDS Nutrient Meter
    Milwaukee Instruments

    Milwaukee Instruments EC40 EC/TDS Nutrient Meter

    Milwaukee EC40 PRO EC/TDS Nutrient Meter The Milwaukee EC PRO EC/TDS Nutrient Meter is an extremely tough, reliable, IP67 Waterproof Nutrient Meter designed to meet your Hydroponic, horticulture and agricultural needs!  This meter arrives...
    $91.89
    $108.99
    $108.99
  • PH7 Solution, 20ml, case of 25
    Milwaukee Instruments

    PH7 Solution, 20ml, case of 25

    This item is sachets Available in 220 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml leak-proof bottles and are recommended for lab application. Sachets are sealed against light and air and are ideal for on-the-spot...
    $14.55
    $22.99
    $22.99
  • 2-Way pH & Moisture Meter
    Active Air

    2-Way pH & Moisture Meter

    Gardeners can conveniently test moisture and pH levels with the handy Active Air 2-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist). pH readings between pH 3 (acidic) and pH 10 (basic) are represented. The durable,...
    $7.87
    $11.84
    $11.84
  • Active Air 3 - Way Meter
    Active Air

    Active Air 3 - Way Meter

    Gardeners can conveniently test their moisture, light, and pH levels with the handy Active Air 3-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist); light readings range from 0 LUX (low light) to 2000 LUX (very strong light);...
    $8.76
    $13.09
    $13.09
  • PH/ORP Storage Solution
    HM Digital Meters

    PH/ORP Storage Solution

    For use with HM Digital's PH-200 and PH-80 (as well as other brands of pH meters). Always make sure your sensor is kept in an electrode storage solution. If dry, refill the pH meter cap with the PH-STOR storage solution. The sponge should be moist (not...
    $7.13
    $8.49
    $8.49
  • TDS-3 Handheld TDS meter
    HM Digital Meters

    TDS-3 Handheld TDS meter

    Ideal for commercial use, the TDS-3 includes a carrying case with belt clip. It is highly efficent and accurate due to its advanced microprocessor technology. It features a measurement range of 0-9990 ppm. From 0-999 ppm, the resolution is in increments...
    $22.26
    $33.99
    $33.99
  • Replacement pH Sensor HM-500
    HM Digital Meters

    Replacement pH Sensor HM-500

    HM-500 Replacement pH probe2 Meter / 80 inch cable lengthIncludes pH storage solution, 6-month warranty
    $46.79
    $59.99
    $59.99
  • Replacement TDS Sensor HM-500
    HM Digital Meters

    Replacement TDS Sensor HM-500

    The HM Digital Hydromaster EC/TDS Probe is a replacement part for the HydroMaster HM-500.
    $38.99
    $49.99
    $49.99
  • PH/Temperature Meter
    HM Digital Meters

    PH/Temperature Meter

    The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. FEATURES Measures pH and...
    $36.30
    $46.50
    $46.50
  • EC/TDS/Temp Waterproof Hydro Tester
    HM Digital Meters

    EC/TDS/Temp Waterproof Hydro Tester

    The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Measures electrical conductivity...
    $36.86
    $42.95
    $42.95
  • 1000ppm Calibration Solution
    HM Digital Meters

    1000ppm Calibration Solution

    NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner.
    $9.56
  • Continuous pH/EC/TDS/Temp portable/wallmount/bench
    HM Digital Meters

    Continuous pH/EC/TDS/Temp portable/wallmount/bench

    HydroMaster Digital testers make monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you can depend on. Continuous pH/EC/TDS/Temp monitor with rechargeable battery. Portable, wall mount, or...
    $268.75
    $359.00
    $359.00
  • pH Up Gallon, CASE OF 4
    Cutting Edge Solutions

    pH Up Gallon, CASE OF 4

    CES pH Up™Concentrated pH adjustment liquid, alkaline buffer raises water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure water or nutrient solution, at small intervals. Note beginning reading and then test pH...
    $88.16
    $134.99
    $134.99
  • pH Up Quart, CASE OF 12
    Cutting Edge Solutions

    pH Up Quart, CASE OF 12

    CES pH Up™Concentrated pH adjustment liquid, alkaline buffer raises water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure water or nutrient solution, at small intervals. Note beginning reading and then test pH...
    $107.29
    $159.99
    $159.99
  • pH Down Gallon, CASE OF 4
    Cutting Edge Solutions

    pH Down Gallon, CASE OF 4

    CES pH Down™Concentrated pH adjustment liquid, acidic buffer lowers water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure water or nutrient solution, at small intervals. Note beginning reading and then test...
    $88.16
    $134.99
    $134.99
  • pH Down Quart, CASE OF 12
    Cutting Edge Solutions

    pH Down Quart, CASE OF 12

    CES pH Down™Concentrated pH adjustment liquid, acidic buffer lowers water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure water or nutrient solution, at small intervals. Note beginning reading and then test...
    $107.29
    $159.99
    $159.99
  • Apera EC calibration kit (2.77EC, 8oz.)
    GroStar

    Apera EC calibration kit (2.77EC, 8oz.)

    GroStar by Apera EC Calibration Kit (2.77 EC, 8 oz. each) • 2.77 EC conductivity standard calibration solution• Used as a reference or checking solution to ensure you have adequately cleaned the EC/ppm probe• Calibration Solution should...
    $12.59
    $14.99
    $14.99
  • Apera pH probe maintenance kit
    GroStar

    Apera pH probe maintenance kit

    All-in-one maintanence kit provides everything you need to maintain, clean and store your GroStar pH probe Kit Includes:  3M KCL storage solution (4oz.) Cleaning solution (8oz.) CalPod solution organizer Probe cleaning brush Wash...
    $19.43
    $23.99
    $23.99
  • Apera pH calibration kit (pH 4/7/10, 8oz. each)
    GroStar

    Apera pH calibration kit (pH 4/7/10, 8oz. each)

    GroStar by Apera pH calibration kit (pH 4/7/10, 8 oz. each) Kit Includes: (1) pH 4.0 calibration solution 8 oz. (1) pH 7.0 calibration solution 8 oz. (1) pH 10.0 calibration solution 8 oz. pH measuring equipment must be cleaned and calibrated...
    $23.48
    $28.99
    $28.99
  • Apera pH calibration kit (pH 4/7, 8oz. each)
    GroStar

    Apera pH calibration kit (pH 4/7, 8oz. each)

    GroStar by Apera pH calibration kit (pH 4/7, 8 oz. each) Kit includes:  (1) 8 oz. pH 4.0 calibration solution (1) 8 oz. pH 7.0 calibration solution  pH measuring equipment must be cleaned and calibrated regularly to ensure accurate...
    $15.38
    $18.99
    $18.99
  • Apera GroStar GS4-E replacement pH/EC combo electrode
    GroStar

    Apera GroStar GS4-E replacement pH/EC combo electrode

    AI58040 - GroStar GS4-E replacement pH/EC combo electrode • Measures pH, conductivity (EC and PPM) and temperature• Combo probe built with lithium glass membrane and titanium alloy to ensure high accuracy and durability• Premium probe...
    $59.99
    $79.99
    $79.99
  • Apera GroStar GS3-E replacement EC electrode
    GroStar

    Apera GroStar GS3-E replacement EC electrode

    AI58030 - GroStar GS3-E replacement EC electrode • Measures conductivity EC, PPM (500), PPM (700) and temperature• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance• Titanium alloy...
    $42.11
    $53.99
    $53.99
  • Apera GroStar GS2-E replacement Soil Spear pH electrode
    GroStar

    Apera GroStar GS2-E replacement Soil Spear pH electrode

    AI58020 - GroStar GS2-E replacement Soil Spear pH electrode • Spear pH Probe measures pH and temperature in nutrient solution, soil, coco coir, rockwool, and many other media types• Premium probe technologies and materials ensure high accuracy...
    $136.49
    $181.99
    $181.99
  • Apera GroStar GS1-E replacement pH electrode
    GroStar

    Apera GroStar GS1-E replacement pH electrode

    AI58010 - GroStar GS1-E replacement pH electrode • Replacement GS1 probe measures pH and temperature• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance• Low-resistance lithium glass...
    $39.77
    $50.99
    $50.99
  • Apera GroStar GS2 Soil pH Pen
    GroStar

    Apera GroStar GS2 Soil pH Pen

    AI31020 - GroStar GS2 Soil pH PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty (probe)• pH 7 & pH 4 solution (50ml bottles of each)• KCL soaking solution (10ml bottle)• Cleaning...
    $192.74
    $256.99
    $256.99
  • Apera GroStar GS4 pH/EC Combo Pen
    GroStar

    Apera GroStar GS4 pH/EC Combo Pen

    AI21040 - GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty (probe)• pH 7 & pH4 calibration solution (50ml bottle each)•...
    $134.24
    $178.99
    $178.99
  • Apera GroStar GS3 EC Pen
    GroStar

    Apera GroStar GS3 EC Pen

    AI11030 - GroStar GS3 EC/PPM/Temp PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty (probe)• 2.77 EC calibration solution, 50 ml bottleFeatures:• Measures conductivity EC, PPM (500),...
    $85.49
    $113.99
    $113.99
  • Apera GroStar GS1 pH Pen
    GroStar

    Apera GroStar GS1 pH Pen

    AI11010 - GroStar GS1 pH PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty (probe)• pH 7 & pH4 calibration solution (50ml bottle each)• KCL storage solution (10ml bottle)•...
    $90.99
    $115.99
    $115.99