pH & Electrochemistry

Water analysis meters comprise all the instruments used to measure the properties of water samples. Conductivity, pH, dissolved oxygen -- there are meters (and electrodes!) for every property.

Ohaus is famous for their precision scales and analytical balances, but their Starter line of water analysis meters is popular all its own. Emphasizing cost effectiveness and user friendliness, the meters in Ohaus's Starter series are perfect instruments for introductory water analysis.

The Starter series includes portable, bench, and pen meters for measuring conductivity, pH, and dissolved oxygen (DO).

Bluelab Commercial Truncheon® Nutrient Meter
-12%
When range, durability and accuracy counts! Big jobs require a big Truncheon! With a conductivity range right up to 6.0 EC (60 CF, 3000 ppm 500 and 4200 ppm 700), it will never leave you short. The Bluelab Commercial Truncheon® Nutrient Meter has been designed for hydroponic crops that require...
From $123.00 From $140.00
Bluelab Original Truncheon® Nutrient Meter
-12%
The World’s favorite conductivity meter. Simply brilliant, brilliantly simple! It is essential when growing with a hydroponic solution to KNOW what the strength of the solution is before feeding your plants AND while they are growing. If the conductivity reading is too low, your plants may not be getting enough...
From $123.00 From $140.00
Bluelab® 2.77 EC Conductivity Standard Solution
-14%
High quality solutions formulated for calibrating and/or testing conductivity probes. Bluelab® conductivity standard solutions are essential for use with all Bluelab® products. Bluelab® Solutions are manufactured specifically for Bluelab® products and are referenced to high laboratory standards to ensure your Bluelab® products last longer and maintain accuracy. The 2.77EC solution...
From $7.00 From $8.17
Bluelab® Combo Meter
-12%
From $299.00 $264.00
It's all you need for simple and reliable crop management. The Bluelab Combo Meter is a portable pH, conductivity and temperature meter all in one. If you are experiencing problems with yellow leaves, or slow stunted growth, the Bluelab Combo Meter will soon tell you if each parameter is within...
From $264.00 From $299.00
Bluelab® Combo Meter Plus
-12%
From $349.00 $308.00
Help Your Plants Grow Fast, reliable and versatile: Combo Meter Plus means you will be able to measure more and build a better understanding of your complete growing system. The multimedia Leap pH probe can be used to measure nutrient solution and directly in the rootzone in a range of...
From $308.00 From $349.00
Bluelab® Conductivity Pen (EC or ppm)
-12%
The ultimate handy solution for measuring conductivity (EC or ppm) and temperature! The Bluelab Conductivity Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. To feed plants well, we need to know what we're feeding...
From $83.00 From $94.00
Bluelab® External Lockout & Alarm Box
-10%
External lockout & alarm box - for a complete 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, the Bluelab® Pro Controller™ is placed in lock out mode, so no further...
From $53.00 From $59.00
Bluelab® Guardian Monitor
-12%
From $399.00 $352.00
The simplest and most effective reservoir monitor you could ever own! The Bluelab Guardian Monitor provides 24 hour continuous reading for pH, conductivity (EC/ppm 700/TDS/CF) and temperature within a nutrient solution. Optimizing these critical parameters through a plants’ growing phase helps ensure a successful crop. Designed for indoor use, the...
From $352.00 From $399.00
Bluelab® Guardian Monitor Connect
-12%
From $450.00 $397.00
Stay connected - monitor, data log, and remotely view pH, conductivity and temperature readings. The Bluelab Guardian Monitor Connect is not only a constant indicator of the desired levels of pH, conductivity, and temperature of your nutrient solution, it also data logs these critical parameters to your computer for you....
From $397.00 From $450.00
Bluelab® Guardian Monitor Connect In-Line
-12%
The last stop before the feed goes into your crop is the Guardian Monitor Connect inline. The Bluelab Guardian Monitor Connect Inline is not only a constant indicator of the desired levels of pH, conductivity, and temperature of your nutrient solution, it also data logs these critical parameters to your...
From $500.00 From $569.00
Bluelab® Multimedia pH Meter with Leap™ pH Probe
-12%
Fast, accurate pH measurement in nutrient solution and root-zone from the palm of your hand. Combine the Bluelab® Multimedia pH Meter and Bluelab® LeapTM 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...
From $220.00 From $249.00
Bluelab® PeriPod™ Dosers
-13%
From $919.00 $800.00
Easy integration for nutrient solution management. Your time is extremely valuable, don't waste it manually dosing. Designed to be teamed up with the Bluelab® Pro Controller™ for a fully integrated solution for optimal reservoir dosing, the Bluelab® PeriPod™ is a simple and reliable inclusion. The Bluelab® PeriPod™ responds to dosing...
From $800.00 From $919.00
Bluelab® calibration solutions are essential for use with all Bluelab® products. Bluelab® Solutions are manufactured specifically for Bluelab® products and are referenced to high laboratory standards to ensure your Bluelab® products last longer and maintain accuracy. pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving...
From $2.00
Bluelab® pH Controller
-12%
From $569.00 $500.00
Hands-free monitoring and dosing of solution pH levels. Simple. We know pH levels can be the difference between a great crop and well, a disaster. Measuring and adjusting nutrient solution levels constantly can be time-consuming. And let’s face it; you have better things to do. Our clever pH controller automatically...
From $500.00 From $569.00
Bluelab® pH Controller Connect
-12%
From $629.00 $551.00
Clever monitoring, dosing and data logging of solution pH levels. Made easy. Sometimes the more you know, the better. And when it comes to managing the pH of your nutrient solution, exact knowledge makes a world of difference. Our clever pH controller Connect automatically monitors and fine-tunes the pH levels...
From $551.00 From $629.00
Bluelab® pH Pen
-11%
From $112.50 $100.00
The ultimate handy solution for measuring pH and temperature! Plants get their nutrient from minerals but they can only get all the right minerals they need if certain conditions are right. Think of nutrients like a lock. pH is the key. A key factor that affects food uptake is whether...
From $100.00 From $112.50
Bluelab® pH Probe KCI Storage Solution
-16%
The perfect solution to store and hydrate your Bluelab pH probes or pens. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab® pH Probes and Pens. It is designed to increase response time and maximize the life of Bluelab® pH Probes and Pens. Add KCl solution...
From $10.00 From $11.94
Bluelab® PowerPod™
-13%
From $550.00 $478.00
Electronic mains switching designed to activate mains powered equipment. 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™ with third party...
From $478.00 From $550.00
Bluelab® Pro Controller
-13%
From $1,099.00 $952.00
Full control of reservoir pH, conductivity and temperature in one place. When connected to a dosing system the Bluelab® Pro Controller™ manages pH, conductivity and temperature levels in reservoirs. As your plants feed, pH and nutrients are automatically adjusted to the desired range. Monitor, data log and control your system...
From $952.00 From $1,099.00
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. pH and conductivity / temperature...
From $14.00
Bluelab® Sample Pot
-15%
From $199.00 $170.00
Perfect for reservoirs located more than 2 meters / 6.5 feet from your controller unit. Place probes directly into the chamber for direct measurement of nutrient solution. Fittings included. Features Fittings included Compatible with Bluelab® Guardian Monitor, Bluelab® Guardian Monitor Connect and Connect In line, Bluelab® pH Controller, Bluelab® pH...
From $170.00 From $199.00
Bluelab® Soil pH Pen
-11%
From $185.00 $164.00
The ultimate handy solution for measuring soil pH and temperature! The Bluelab Soil pH Pen provides a pH and temperature reading of soils and media, so you know that the right nutrients will be made available to your plants. In soils or growing media, pH strongly influences the availability of...
From $164.00 From $185.00
Congo Red Paper, Test Strips The Congo Red test paper is used to test narrow-range acidic solutions. Congo Red Test Paper is used in acid washes for metal plating where pH values are very low (pH 1.0-3.0). The Congo Red indicator remains blue below pH 3.0, then gradually turns to...
From $16.00
Milwaukee Instruments pH Controller
-13%
Milwaukee Instruments pH Controller, Model MC122 Professional pH controller especially designed for use with hydroponic systems and aquariums. Range: 0.0 to 14.0, 2 point manual calibration and accuracy: ±0.2 pH. Set point range: 5.5 to 9.5 pH, LED visual alarm active and power plug socket for dosing turned on when...
From $187.00 From $215.99
Milwaukee Instruments pH Tester Model pH600 AQ
-14%
Milwaukee’s most affordable pH tester, range: 0.0 to 14.0 pH, with one point manual calibration and accuracy of ±0.2 pH. Battery life: 700 hrs. Calibration solution sold separately.
From $31.00 From $35.95
Oakton® Ecotestr™ pH 1
-12%
The economical, simple-to-use pH tester measures pH levels and temperatures quickly, displaying them both simultaneously on a large dual-line LCD. It has a pH range from 0 to 14 with an accuracy of ±0.1 pH. The tester features up to three pH calibration points with auto NIST and US buffer...
From $68.00 From $76.99
Ohaus® Starter 2100 pH Bench Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of benchtop pH meters. Starter 2100 is the economical choice for applications requiring simple pH measurement.With the attached quick guide, five clearly marked keys and user...
From $379.10 From $446.00
Ohaus® Starter 300 Portable pH Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of a portable pH meter. This portable meter offers convenience, reliability and durability in one compact design.Automatic and manual temperature compensation ensures accurate readings while a...
From $259.25 From $305.00
Ohaus® Starter 300C Portable Conductivity Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a the form of a portable conductivity meter that can also test for TDS. This portable meter offers convenience, reliability and durability in one compact design.Starter 300C has...
From $317.05 From $373.00
Ohaus® Starter 300D Portable DO Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of a portable dissolved oxygen (DO) meter. This portable meter offers convenience, reliability and durability in one compact design.The galvanic electrode can be used immediately after...
From $306.00 From $360.00
Ohaus® Starter 3100 pH Bench Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of benchtop pH meters. Starter 3100 has many smart features that make it as intuitive as it is accurate for standard pH measurement.Starter 3100's intuitive software...
From $518.50 From $610.00
Ohaus® Starter 3100C Conductivity Bench Meters
-15%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of a benchtop conductivity meters. Starter 3100C can test for conductivity, salinity, and TDS and has many smart features that make it as intuitive as it...
From $579.70 From $682.00
Ohaus® Starter 3100M pH & Conductivity Bench Meters
-15%
Save time, space and money with the Starter 3100M Bench Meter, which combines all your pH, ORP, conductivity, TDS, salinity, resistivity and temperature measurements - in one smart device. Ideal for a wide range of lab applications, the ST3100M is incredibly easy to use. Equipped with software to ensure the...
From $675.75 From $795.00
Ohaus® Starter 400D Portable DO Meters
-15%
For over a century, OHAUS has perfected the art of measurement through our line of weighing products. Taking the same approach to our weighing equipment, OHAUS now delivers Starter ST400D - a practical, affordable, low-maintenance DO Portable Meter equipped with optical technology. The ST400D is ideal for applications that require...
From $470.90 From $554.00
Ohaus® Starter 5000 pH Bench Meters
-15%
From $1,307.00 $1,110.95
Backed by OHAUS’ century-old commitment to providing precise measurement, Starter 5000 provides accurate pH and ORP measurement for high-level experiments and research. Enhanced features, advanced technology, and high performance have been combined to support complex laboratory tasks requiring pH measurement.Starter 5000's performance is propelled by a 1000 item library, 10...
From $1,110.95 From $1,307.00
Ohaus® Starter Electrodes
-3%
From $63.00 $61.00
Backed by our commitment to accurate and precise measurement, the OHAUS Starter Series of electrodes are designed to produce exact results time and time again. The Starter Series includes pH, reference, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), and temperature electrodes that can be used in combination with Starter bench...
From $61.00 From $63.00
Ohaus® Starter Water Analysis Pen Meters
-3%
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option...
From $59.00 From $61.00
Sure Test® Base pH Pen
-29%
From $50.60 $36.00
The Sure Test® Base pH Pen is our most affordable pH meter. Features a single touch auto buffer recognition for easy, error-free calibration. Waterproof housing (IP65 rated). The display has an 0.1 resolution and an accuracy of +/- 0.3. Comes with 4x LR44 batteries.
From $36.00 From $50.60
Sure Test® Base Plus pH Pen
-29%
From $105.50 $75.00
The Sure Test® Base Plus pH Pen combines performance with affordability. Reads both pH and temperature (ºF or ºC) with automatic temperature compensation (ATC) for more reliable pH measurements. Features a pH resolution of 0.01 and an impressive pH accuracy of +/- 0.05. Single touch auto buffer recognition for easy,...
From $75.00 From $105.50
Sure Test® Commercial Lab Meter
-29%
From $529.95 $376.00
Sure Test Commercial pH / EC / TDS / ORP Lab Meter The Sure Test® Commercial Lab Meter offers the ultimate in precision and accuracy. Dependably measure pH and conductivity (EC or TDS or Salt) and temperature (ºF or ºC) with ease. It also has the ability to measure oxidation...
From $376.00 From $529.95
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