Conductivity, TDS, Salinity Meters

Water Quality Meters

Water Quality Meters

Conductivity Meters

Conductivity Meters

Salinity Meters

Salinity Meters

TDS Meters

TDS Meters

Conductivity Electrodes

Conductivity Electrodes

Conductivity Calibration Solutions

Conductivity Calibration Solutions

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TDS Meter for Water Testing

A TDS meter, or ppm meter, measures total dissolved solids in a liquid by parts per million. It estimates the concentration of dissolved ions such as salts, minerals, and metals by testing the solution’s electrical conductivity.

At Instrument Choice, we stock a full range of TDS meters, conductivity meters, and salinity meters for water quality testing across scientific, industrial, and environmental applications. These are designed to give accurate, fast readings in the lab or field, helping users assess purity, mineral content, and dissolved salt levels in water. We carry handheld testers, portable kits, and advanced loggers to suit a wide range of needs, backed by local advice and fast delivery across Australia.

The Benefits of a Conductivity Meter

A conductivity tester measures how well water conducts electrical current, a key indicator of its ion content. This is useful in wastewater testing, environmental research, and industrial monitoring. 

We supply conductivity meters that are both easy to use and highly accurate. Many double as an EC meter (electrical conductivity) or EC tester, often showing results in microsiemens (µS) or millisiemens (mS). You can also find options that allow conversion to TDS, helping you compare and interpret water quality measurements across different units.

Looking for a lab-ready or waterproof model? Browse our range of water quality meters for more options.

Salinity Meter or Salt Tester

A salinity tester measures the concentration of dissolved salts in water. This is critical for marine aquariums, agriculture, aquaculture, and food production. We stock handheld and benchtop salinity testers with clear digital displays and quick calibration.

A salt meter gives a direct readout of salt levels in either grams per litre or parts per thousand (ppt), making it easier to manage water conditions and ensure compliance with safety or industry standards. Need to monitor multiple parameters at once? Explore our sensors for compatible accessories.

Convenience on the Go: A TDS Pen

A TDS meter measures total dissolved solids in a water sample, helping you understand mineral concentration and overall water quality. These are used in laboratories, agriculture, hydroponics, and aquaculture.

For field or portable testing, a TDS pen offers a quick, easy way to check levels on the go. Compact and battery-operated, these are popular for water tanks, nutrient solutions, and filtration checks. Need something more precise? A TDS reader with temperature compensation and ppm display provides more detailed results.

Browse TDS Meters Today

Need help choosing the right EC tester, TDS pen, or salt meter? Contact us for product comparisons, calibration solutions, and expert advice. We ship fast and support customers Australia-wide.

Our range includes basic testers, automatic temperature compensation models, and meters with built-in memory or export options. They’re used widely across schools, farms, and laboratories to support daily testing routines and long-term data collection. Each meter is supported by our team of scientists and includes detailed specifications for ease of selection.

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