Meters & Solutions

65 products

  • HM Digital HM Digital PH-STOR pH Electrode Storage Solution

    Out of stock, 1-3 weeks

     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 soaking wet). 

    Out of stock, 1-3 weeks

    $8.49

  • Bluelab pH 7.0 Calibration Solution - 500ML

    Bluelab Bluelab pH 7.0 Calibration Solution - 500ML

    Out of stock, 1-3 weeks

    pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.

    Out of stock, 1-3 weeks

    $22.00

  • Bluelab pH 4.0 Calibration Solution - 500ML

    Bluelab Bluelab pH 4.0 Calibration Solution - 500ML

    Out of stock, 1-3 weeks

    pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.

    Out of stock, 1-3 weeks

    $22.00

  • Last stock! Bluelab Probe Care Kit - Conductivity Probe

    Bluelab Bluelab Probe Care Kit - Conductivity Probe

    2 in stock In stock

    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. If the probe is contaminated or dirty, it affects the accuracy of the reading displayed. Conductivity kit contents: instructions, 500ml 2.77 EC solution, plastic cup, conductivity probe cleaner and chamois (probe cleaning instrument).

    2 in stock In stock

    $31.00

  • Bluelab 2.77 EC Conductivity Solution - 500ML

    Bluelab Bluelab 2.77 EC Conductivity Solution - 500ML

    Out of stock, 1-3 weeks

    The 2.77EC solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/ppm probe. Calibration Solution should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be stored with the lids securely tightened.

    Out of stock, 1-3 weeks

    $22.00

  • Bluelab pH Probe KCl Storage Solution 250ML

    Bluelab Bluelab pH Probe KCl Storage Solution 250ML

    Out of stock, 1-3 weeks

    The perfect solution to store and hydrate your Bluelab pH products. 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 results, use the KCl solution to store the pH pen/probe after use and hydrate monthly. Bluelab pH Probe KCl Storage Solution is manufactured to high laboratory standards.

    Out of stock, 1-3 weeks

    $24.50

  • Sale -10%Last stock! Bluelab Connect Stick 2

    Bluelab Bluelab Connect Stick 2

    1 in stock In stock

    Get Connected. Improve crop performance and reduce errors with the power of data and remote monitoring. Receive wireless monitoring data from all Bluelab Connect devices to your computer and smartphone or tablet. Receive important push notifications on your mobile device so you can respond immediately to changes, support growing decisions and improve crop performance. Send wireless data 100m/330ft to and from Connect devices within the growing environment and up to 400m/1312ft in open space (line-of-sight). Only one Connect Stick 2 required to receive wireless data from up to 50 Connect devices. Send Bluelab Connect wireless data further in large growing facilities and environments. Simply plug the Bluelab Range Extender 2 into a power supply between Bluelab devices and Bluelab Stick 1 or 2 to increase the wireless signal range. For extra-long distances, multiple Bluelab Range Extender 2s can be used. Increase the wireless range between Bluelab Connect devices and the computer by up to four times when Connect Range Extender 2 is paired with Connect Stick 2.

    1 in stock In stock

    $168.54 $151.69

  • Sale -10%Last stock! HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp

    HM Digital HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp

    1 in stock In stock

    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 benchtop use.HydroMaster HM-500 pH/EC/TDS/¬∞F Tester (113831)‚Ä¢ Tests pH at a range of 0 pH-14 pH, temperatures from 30¬∞F-176¬∞F, TDS from 0-9999 ppm and EC from 0-9999 ŒºS‚Ä¢ Stores up to 20 measurement readings, so you can monitor changes over time‚Ä¢ LCD touch-type screen with auto backlighting‚Ä¢ Powered by a rechargeable lithium ion battery‚Ä¢ Features an adjustable alarm that has a high and low set point‚Ä¢ Automatically turns off after 5 minutes‚Ä¢ Comes with wall mountable bracket, USB cable, 2 flotation disks, 1 EC/TDS conductivity sensor, 1 pH sensor, 1 packet each pH 4, pH 7, storage solution, and 1000 ppm calibration solution‚Ä¢ 110V-220VThree year warranty (6 month warranty on the pH probe)

    1 in stock In stock

    $359.00 $323.10

  • Sale -10% Milwaukee MA871 Digital Brix Refractometer

    Milwaukee Milwaukee MA871 Digital Brix Refractometer

    Out of stock, 1-3 weeks

    The Milwaukee digital BRIX refractometer is temperature compensated with a 0 to 85 percent BRIX range and +/- 0.2 percent accuracy. It is easy to use with simple two button operation and fast with a response time under 2 seconds. Maintenance is a breeze also with an easy-to-clean sealed flint glass prism and stainless steel well.DESIGN FEATURESFast, accurate results with digital dual level LCD readout. Easy measurement with just 2-3 drops of sample needed and results less than 2 seconds. Simple one-point calibration using distilled or deionized water. Easy to clean, stainless steel sample well with unit rated to IP65 as "dust tight" and protected against water jets. Battery percent level indicator with automatic shut-off (batteries included). Ideal for winemakers, brewers, fruit and vegetable growers, maple syrup producers, and food producers. The measurement technique and temperature compensation employ methodology recommended in the ICUMSA Methods Book (Internationally recognized body for Sugar Analysis).

    Out of stock, 1-3 weeks

    $149.00 $134.10

  • Luster Leaf® Rapitest® pH Soil Tester - Contains 10 pH Tests

    Luster Leaf Luster Leaf® Rapitest® pH Soil Tester - Contains 10 pH Tests

    Out of stock, 1-3 weeks

     Ideal test to determine soil acidity/alkalinity. Particularly valuable for adjusting soil conditions for Better-Growing lawns, shrubs, evergreens, and plants. Just mix soil and water, pour off solution into comparator, add tablet, shake, and compare to color chart. It's just that easy. 

    Out of stock, 1-3 weeks

    $8.59

  • AC Infinity pH Meter Kit, pH Pen Tester for Water

    AC Infinity AC Infinity pH Meter Kit, pH Pen Tester for Water

    Out of stock, 1-3 weeks

      A pH reader for water quality assessment designed to help monitor and maintain proper pH levels. Measures the acidity, alkalinity, and temperature of water for gardens, aquariums, pools, and more. Sensor probe with sensitive glass membrane delivers instant pH readings with high accuracy. IP-67 rated to be sealed from high-volume moisture, dust, and sand; can also withstand high levels of heat. Lab-grade pH monitor testing kit includes ready-to-use 4.00 & 7.00 solutions for long-lasting precision. PRODUCT DESCRIPTION A digital water quality meter designed to measure water’s acidity, alkalinity, and temperature to help optimize its quality for gardening and water treatment applications. The highly responsive sensor probe utilizes a lithium glass membrane to instantly determine pH readings with highly precise ±0.1 accuracy. This pH pen tester for water features an IP-67 rating, specially sealed to withstand moisture and heat, as well as block out intrusive dust and sand. For further protection, the hydroponic pH meter is built with a sensor shield to safeguard your probe in between uses. The included 4.00 pH and 7.00 pH calibration solutions ensure consistently accurate measurements, the former also supporting proper storage conditions to help extend the lifespan of the pH and PPM meter. APPLICATIONS This fast-acting nutrient test alkalinity meter will help you determine how well your water uptakes nutrients. Fit for use as a pH meter for plants in horticultural settings like gardens, grow tents, greenhouses, and hydroponics systems. In addition, its application spans far beyond plant growing, capable of being a general pH level tester for water used in swimming pools, spas, aquarium fish tanks, and beverage homebrewing applications to help determine water safety.

    Out of stock, 1-3 weeks

    $59.99

  • Apera pH Calibration Kit (pH 4/7, 8oz. ea)

    Apera Instruments Apera pH Calibration Kit (pH 4/7, 8oz. ea)

    Out of stock, 1-3 weeks

      Product Details 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 readings. High accuracy (0. 01 pH): standardized against NIST Certified pH references within 0. 01 pH at 25˚C (77˚F). ideal for the calibration of all pH meters Color-coded, double-sealed, 1-year shelf life Expiration date and temperature/ph reference chart provided for reference Non-hazardous product Calibration Solution should be stored in a cool place out of direct sun and heat.

    Out of stock, 1-3 weeks

    $18.99

  • Milwaukee MA9020 ORP 200-275 mV Solution - 230ml

    Milwaukee Milwaukee MA9020 ORP 200-275 mV Solution - 230ml

    14 in stock In stock

      MA9020 is a lab grade ORP 200-275 mV solution certified to meet the range. MA9020 is used to check the health and acuracy of an ORP electrode. Milwaukee solutions are designed to help you achieve reliable and repeatable ORP measurements. DESIGN FEATURES OPR 200-275 mV solution value (230 mL). Fundamental for the correct use of ORP electrodes and for obtaining the most accurate and reproducible readings. Sealed against light with air tight, tamper proof cap. Ideal for fast accuracy check. Simply open, pour into a beaker or container and insert the tester or electrode to start the ORP mV check process.

    14 in stock In stock

    $19.25

  • Milwaukee Waterproof pH Tester PH54

    Milwaukee Milwaukee Waterproof pH Tester PH54

    Out of stock, 1-3 weeks

    Out of stock, 1-3 weeks

    $50.99

  • LR44 Watch Battery - Replacement for PH-80S PH Pen

    Out of stock, 1-3 weeks

    $0.75

  • Luster Leaf Digital Soil pH Meter

    Luster Leaf Luster Leaf Digital Soil pH Meter

    6 in stock In stock

    Digital results from 3.5 to 9.0. Instructions and plant pH preference list included.

    6 in stock In stock

    $18.99

  • Luster Leaf Rapitest pH Test

    Luster Leaf Luster Leaf Rapitest pH Test

    Out of stock, 1-3 weeks

    Luster Leaf Rapitest pH Test

    Out of stock, 1-3 weeks

    $21.29

  • Luster Leaf Digital Moisture Meter

    Luster Leaf Luster Leaf Digital Moisture Meter

    Out of stock, 1-3 weeks

    Digital results from 0 to 9.9. Printed instructions and extensive plant list.

    Out of stock, 1-3 weeks

    $18.59

  • Luster Leaf Mini Moisture Tester

    Luster Leaf Luster Leaf Mini Moisture Tester

    Out of stock, 1-3 weeks

    Luster Leaf Mini Moisture Tester

    Out of stock, 1-3 weeks

    $8.99

  • Sale -10% HM Digital PH80 pH/Temperature Meter

    HM Digital HM Digital PH80 pH/Temperature Meter

    Out of stock, 1-3 weeks

    Resolution: pH 0.1 pH, 0.00–14.0 pH. Accurate to +/-0.1 pH. Hold button and auto shut-off. Automatic calibration: Auto-ranging to 4, 7 or 10 pH. Very reliable and long lasting. Low battery indicator. Clear cap to notice moisture (or lack of) on probe. Glass encased reference electrode helps retain moisture. Batteries included.

    Out of stock, 1-3 weeks

    $49.29 $44.36

  • Luster Leaf Rapitest 3-Way Digital Analyzer

    Luster Leaf Luster Leaf Rapitest 3-Way Digital Analyzer

    Out of stock, 1-3 weeks

    Luster Leaf Rapitest 3-Way Digital Analyzer

    Out of stock, 1-3 weeks

    $40.99

  • Bluelab pH Probe KCl Storage Solution 120ML

    Bluelab Bluelab pH Probe KCl Storage Solution 120ML

    Out of stock, 1-3 weeks

    The perfect solution to store and hydrate your Bluelab pH products. 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 results, use the KCl solution to store the pH pen/probe after use and hydrate monthly. Bluelab pH Probe KCl Storage Solution is manufactured to high laboratory standards.

    Out of stock, 1-3 weeks

    $12.58

  • LUSTER LEAF Mini 4-in-1 Tester

    Luster Leaf LUSTER LEAF Mini 4-in-1 Tester

    6 in stock In stock

    LUSTER LEAF Mini 4-in-1 Tester

    6 in stock In stock

    $18.99

  • Sale -10% Bluelab Multimedia pH Meter with Leap pH Probe

    Bluelab Bluelab Multimedia pH Meter with Leap pH Probe

    Out of stock, 1-3 weeks

    The perfect, portable way to accurately measure and monitor pH levels in a wide range of media. We have combined the Bluelab Multimedia pH Meter and Bluelab Leap pH Probe to take fast, accurate measurements in nutrient solution, soil, coco coir, rockwool, potting mix and many other media types. Calibration is simple with one push button on the meter and fresh Bluelab Calibration Solutions. Successful calibration indicator is displayed on screen for 30 days to indicate when re-calibration is required. The Bluelab Leap pH Probe is suitable for use with all Bluelab products that use a BNC connection. Team with the Bluelab Solutions and the convenient Bluelab Carry Case (#716440). 2 m / 6.6 ft standard cable included.

    Out of stock, 1-3 weeks

    $295.74 $266.17


You have seen 48 out of 65 products

© 2026 Matt’s Hydroponics, Powered by Shopify