Buy Water Quality Meters, Controllers and Testing Equipment
Find water quality meters, monitor/controllers, sensors, test kits and water testing accessories at Selectum LLC. This category includes products for measuring or monitoring parameters such as pH, ORP, conductivity, resistivity, dissolved oxygen, chlorine, chlorine dioxide, ozone, ammonia, chromate, hydrogen peroxide and other water chemistry values. The selection includes Myron L pH, ORP, conductivity and resistivity monitor/controllers, CHEMetrics water test kits, Sensorex chlorine dioxide sensors, and products from Walchem, Ohaus, PCE Instruments, HM Digital, GF Piping Systems, Vee Gee Scientific and other available manufacturers. Explore the catalog to find water testing equipment that matches your parameter, range, output and monitoring requirements.
Applications and Uses for Water Quality Meters
Water quality meters and testing products are used for water treatment, process water monitoring, boiler and cooling water checks, industrial water systems, laboratory testing, environmental sampling, aquaculture, facility maintenance and quality control. Products in this category support continuous monitoring, spot testing, chemical test kit analysis, sensor-based measurement or controller-based process monitoring. Because water quality testing is parameter-specific, each product should be selected according to the measurement type, sample range, accuracy needs, output signal, installation style and compatible sensors or reagents. If your setup also requires standalone pH measurement, Selectum carries dedicated pH meters in a separate category.
Products in this category
This category offers a broad selection of water quality meters, controllers, sensors and testing products for different monitoring needs:
- pH, ORP, conductivity and resistivity monitor/controllers for compatible water monitoring systems
- Digital and analog water quality controllers with alarms, 4-20 mA outputs, control modules, power cord options and isolated power supplies on selected models
- CHEMetrics water test kits for parameters such as ammonia, chlorine, dissolved oxygen, ozone, chromate, filming amines and hydrogen peroxide
- Chlorine dioxide sensors and digital communication sensor options from Sensorex
- Water quality testing products and accessories from Walchem, Myron L, CHEMetrics, Sensorex, Ohaus, PCE Instruments, HM Digital, GF Piping Systems and other available brands
- Products with different measurement ranges, outputs, power options, display types and installation formats
Specifications and selection guide
Choosing the right water quality meter or testing product starts with the parameter you need to measure. Confirm whether you need pH, ORP, conductivity, resistivity, chlorine, chlorine dioxide, dissolved oxygen, ozone, ammonia, hydrogen peroxide or another water chemistry value. Then check the measurement range, resolution, output signal, alarm or control requirements, power supply, sensor compatibility, reagent requirements and whether the product is designed for handheld testing, kit-based analysis or continuous monitoring. This category includes many product types across multiple pages, so filtering by brand, parameter, measurement range and product format can help narrow the selection. Related instrumentation such as flow meters for water system monitoring is available in its own category.
Complete your setup
Pair the meter or controller with compatible sensors, electrodes, probes, reagents, calibration solutions, sample cells, mounting hardware, cables, power supplies or replacement parts, confirming the parameter, range, sensor connection and reagent method before combining components.
Why Shop Water Quality Meters at Selectum LLC
Selectum stocks water quality equipment from nine manufacturers - from Walchem process controllers and Myron L monitor/controllers to CHEMetrics field test kits and Sensorex digital sensors - so you can source water quality monitoring hardware and consumable test kits in one order. All items ship with listed pricing, free shipping on qualifying orders and compatibility details on the product page.
Frequently Asked Questions
How do I choose the right water quality meter?
Start by identifying the parameter you need to measure, such as pH, ORP, conductivity, resistivity, chlorine, dissolved oxygen, chlorine dioxide, ozone, ammonia or another water chemistry value. Then check the measurement range, required accuracy, sample type, output signal, power supply and whether you need a handheld meter, test kit, sensor or continuous monitor/controller.
What is the difference between a water quality meter and a monitor/controller?
A water quality meter is often used for measurement or spot testing, while a monitor/controller is designed for ongoing measurement and may include alarms, outputs or control functions for compatible systems. If you need continuous process monitoring or automated control, check whether the product includes the required outputs, alarms and sensor compatibility.
When should I use a chemical water test kit instead of an electronic meter?
A chemical test kit can be useful for specific water chemistry checks such as chlorine, ammonia, dissolved oxygen, ozone, chromate or hydrogen peroxide. An electronic meter or controller may be better for repeated measurement, continuous monitoring or parameters that require a probe or sensor. Choose based on the parameter, range, test frequency and reporting requirements.
Do water quality meters need calibration or reagents?
Many electronic meters and sensors require calibration or verification with compatible standards, while chemical test kits require the correct reagents for the selected parameter and range. Check the product manual or listing to confirm what calibration solutions, reagents, sensors or replacement parts are needed.
Can one water quality meter test every parameter?
No. Water quality products are usually designed for specific parameters and measurement ranges. A pH controller, conductivity monitor, chlorine dioxide sensor or ammonia test kit cannot be used interchangeably unless the product specifically supports those measurements. Confirm the parameter and range before ordering.