Meters & Solutions

  • Microbe Life Hydroponics pH DOWN, 1 qt
    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...
    $14.35
    $18.99
  • Microbe Life Hydroponics pH UP, 1 qt
    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...
    $14.35
    $18.99
  • Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
    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.
    $21.30
    $30.99
  • Milwaukee Instruments pH600 Digital pH Pen
    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...
    $21.91
    $28.99
  • Milwaukee Instruments pH 7.01 Solution, 230 ml
    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,...
    $8.99
    $11.99
  • Milwaukee Instruments pH 4.01 Calibration Solution, 230 ml
    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,...
    $8.99
    $11.99
  • Milwaukee Instruments MA871 Digital Brix Refractometer, Range 0-85%
    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.
    $159.74
    $212.99
  • Milwaukee Instruments EC40 PRO 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...
    $69.50
    $81.99
  • Milwaukee Instruments pH 7 Calibration Solution, 20 ml Sachets, 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...
    $13.48
    $22.99
  • Active Air 2-Way Moisture/pH 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,...
    $7.38
    $11.80
  • 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);...
    $8.65
    $13.74
  • Mad Farmer pH Test Kit
    Mad Farmer

    Mad Farmer PH Test Kit

    A consistent pH is one of the most important elements in maintaining a healthy garden. Make sure your plants work at an optimal pH level with Mad Farmer pH Kit.
    $5.05
    $7.35
  • Mad Farmer pH Control Kit, Case of 12
    Mad Farmer

    Mad Farmer pH Control Kit, Case of 12

    A consistent pH is one of the most important elements in maintaining a healthy garden. Make sure your plants work at an optimal pH level with Mad Farmer pH Kit.
    $127.50
    $203.88
  • Luster Leaf Digital Soil pH Meter
    Luster Leaf

    Digital pH Meter

    Digital results from 3.5 to 9.0. Instructions and plant pH preference list included.
    $15.69
    $18.99
  • Luster Leaf Digital Moisture Meter
    Luster Leaf

    Digital Moisture Meter

    Digital results from 0 to 9.9. Printed instructions and extensive plant list.
    $14.84
    $17.99
  • HM Digital PH-STOR pH Electrode 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...
    $6.36
    $8.49
  • HM Digital 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...
    $20.61
    $33.99
  • HM Digital  Replacement pH Sensor Probe for HM-500
    HM Digital Meters

    Replacement pH Sensor HM-200

    HM-500 Replacement pH probe2 Meter / 80 inch cable lengthIncludes pH storage solution, 6-month warranty
    $44.99
    $59.99
  • HM Digital Hydromaster Replacement EC/TDS Probe
    HM Digital Meters

    Replacement TDS Sensor HM-200

    The HM Digital Hydromaster EC/TDS Probe is a replacement part for the HydroMaster HM-500.
    $37.49
    $49.99
  • HM Digital Replacement Platinum Sensor for COM-100
    HM Digital Meters

    Replacement Platinum Sensor COM-100

    This spare sensor is for HM Digital EC/TDS/Temp Combo Meter model COM-100. Features platinum TDS/EC sensor and thermister.
    $27.71
    $36.95
  • HM Digital PH-80 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...
    $34.90
    $46.50
  • HM Digital PH-200 Waterproof pH/Temperature Meter
    HM Digital Meters

    Waterproof pH/Temperature Meter

    FEATURES Measures pH and temperature Auto-ranging three point calibration with digital fine tuning Includes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up Waterproof housing Simultaneous temperature...
    $76.44
    $101.92
  • HM Digital HydroMaster HM-100 Continuous pH/EC/TDS/Temp Monitor
    HM Digital Meters

    HydroMaster 100 - Continuous pH/EC/TDS/Temp Monitor

    The HM Digital HydroMaster HM100 conveys 3 critical parameters for successful gardening. The HM100 is a versatile continuous monitor that displays pH, EC (µS/mS), TDS (.5 (NaCl) / .7 (442)) & Temperature (°F / °C) providing accurate, reliable...
    $212.49
    $289.95
  • HM Digital COM-80 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...
    $35.44
    $42.95
  • HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter
    HM Digital Meters

    Waterproof EC/TDS/Temp Combo Meter

    Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment...
    $43.08
    $76.95
  • HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
    HM Digital Meters

    1000ppm Calibration Solution

    NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner.
    $8.54
    $9.49
  • HM Digital AquaPro TDS/Temperature Meter
    HM Digital Meters

    AquaPro TDS/Temperature Meter

    FEATURES Measures total dissolved solids (TDS) and temperature Automatic Temperature Compensation (ATC) Water-resistant housing Measurement Range: 0-5000 ppm Digital Calibration (push button) Auto-off function, data-hold function and...
    $29.50
    $42.95
  • HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp
    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
  • Active Aqua Hydroponic pH Test Kit
    Active Aqua

    pH Test Kit (12/cs)

    (Wide Spectrum) Measures 3-10 pH. The Hydroponic pH test kit is good for 150 tests. At the rate of 3 tests per week it will last one year, making it excellent value for money. This kit covers a pH range of 3-10 measuring in 0.1 increments.
    $4.99
    $6.63
  • Dyna-Gro pH-Up 0-0-5, 1 qt
    Dyna-Gro

    pH-Up 0-0-5 Supplement, 1 quart

    pH-Up 0-0-5 is a Dyna-Gro product used to raise the pH of water.What is pH? pH is a measure of acidity or alkalinity. For growing in soil, the pH range should be 6.0 to 6.5. In hydroponics, pH should be maintained between 5.5 and 6.0 When the...
    $13.46
    $14.99
  • Dyna-Gro pH-Up 0-0-5, 8 oz
    Dyna-Gro

    pH-Up 0-0-5 Supplement, 8 oz

    pH-Up 0-0-5 is a Dyna-Gro product used to raise the pH of water.What is pH? pH is a measure of acidity or alkalinity. For growing in soil, the pH range should be 6.0 to 6.5. In hydroponics, pH should be maintained between 5.5 and 6.0 When the...
    $6.28
    $6.99
  • Dyna-Gro pH-Down 1-5-0, 1 qt
    Dyna-Gro

    pH-Down 1-5-0 Supplement, 1 quart

    pH-Down 1-5-0 is a Dyna-Gro product used to lower the pH of water.What is pH? pH is a measure of acidity or alkalinity. For growing in soil, the pH range should be 6.0 to 6.5. In hydroponics, pH should be maintained between 5.5 and 6.0 When the...
    $13.46
    $14.99
  • Dyna-Gro pH-Down 1-5-0, 8 oz
    Dyna-Gro

    pH-Down 1-5-0 Supplement, 8 oz

    pH-Down 1-5-0 is a Dyna-Gro product used to lower the pH of water.What is pH? pH is a measure of acidity or alkalinity. For growing in soil, the pH range should be 6.0 to 6.5. In hydroponics, pH should be maintained between 5.5 and 6.0 When the...
    $6.28
    $6.99
  • Cutting Edge Solutions pH Up, 1 gal, 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...
    $80.15
    $129.99
  • Cutting Edge Solutions pH Up, 1 qt, 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...
    $97.54
    $156.99
  • Cutting Edge Solutions pH Down, 1 gal, 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...
    $80.15
    $129.99
  • Cutting Edge Solutions pH Down, 1 qt, 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...
    $97.54
    $156.99
  • Bluelab External Lockout & Alarm Box
    BlueLab

    SPO Bluelab External Lockout/Alarm box

    This Bluelab External Lockout and Alarm Box is an optional extra for your dosing system. Use to connect the Bluelab® Pro Controller™ to external switches, for example a float switch or a greenhouse alarm system. When these switches are activated,...
    $44.25
    $59.00
  • Bluelab PowerPod
    BlueLab

    SPO Bluelab Powerpod

    The Bluelab® PowerPod™ is an electronically controlled mains switching box that is designed to activate mains powered equipment via control signals from a Bluelab® Controller.The Bluelab® PowerPod™ is ideal for use when using a Bluelab® Pro Controller™...
    $418.75
    $550.00
  • Bluelab pH Up, 1 gal Bottle, case of 4
    BlueLab

    Bluelab pH Up 1 Gallon Bottle (Case of 4)

    Optimum growth needs optimum pH. And Bluelab makes optimum simple. If your pH isn't in the right range—and that's 5.5-6.5 for most plant varieties—your nutrients are likely wasted. Too high or too low, and you're in trouble. The result is nutrient...
    $141.00
    $188.00
  • GroStar EC Calibration Kit (2.77 EC, 8 oz. each)
    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...
    $11.24
    $14.99
  • GroStar pH Probe Maintanence 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...
    $17.99
    $23.99
  • GroStar pH calibration kit (pH 4/7/10, 8 oz. 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...
    $21.74
    $28.99
  • GroStar pH calibration kit (pH 4/7, 8 oz. 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...
    $14.24
    $18.99
  • 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
  • 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...
    $40.49
    $53.99
  • 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
  • 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...
    $38.24
    $50.99
  • 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
  • GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) 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