The Milwaukee EC60 PRO is a professional waterproof pocket meter designed to measure electrical conductivity (EC), total dissolved solids (TDS) and temperature in water. With a wide conductivity measurement range, automatic temperature compensation and a replaceable probe, it provides a convenient way to monitor changes in dissolved mineral content.

For aquarium keepers, the EC60 PRO can be used to compare source water, reverse osmosis (RO) water and prepared aquarium water, as well as monitor conductivity changes in freshwater systems. It is also suitable for hydroponics, nutrient solutions and other applications where conductivity measurements are important.

Three measurements in one waterproof meter

The EC60 PRO measures:

• Electrical conductivity (EC): 0.00–20.00 mS/cm

• Total dissolved solids (TDS): 0.00–10.00 ppt

• Temperature: 0.0–60.0°C

The dual-level display shows the selected EC or TDS reading alongside the water temperature.

Electrical conductivity indicates how readily water conducts electricity, which is influenced by the concentration of dissolved ions. It is a useful way to monitor changes in mineral content, although it does not identify individual minerals or contaminants.

Useful for aquarium water monitoring

Conductivity is a useful supporting measurement for aquarium water preparation and maintenance.

The Milwaukee EC60 PRO can help you:

• Compare conductivity in tap water, RO water and prepared aquarium water.

• Monitor changes in dissolved mineral content.

• Check consistency when preparing water for aquarium water changes.

• Track conductivity changes in freshwater aquariums.

• Monitor water temperature alongside conductivity or TDS.

Important: The EC60 PRO is not a dedicated marine aquarium salinity meter. Its maximum conductivity range is 20.00 mS/cm, which is below the conductivity of typical full-strength seawater. For routine marine aquarium salinity measurement, choose an instrument specifically designed for that application.

Automatic temperature compensation

Conductivity readings are affected by temperature. The EC60 PRO includes automatic temperature compensation (ATC), helping compensate for temperature-related changes during measurement.

Its temperature compensation coefficient is adjustable from 0.0 to 2.4% per °C, providing flexibility for different measurement conditions.

Temperature is displayed simultaneously with the EC or TDS reading, making it easier to monitor both measurements together.

Replaceable measuring probe

The EC60 PRO features a replaceable EC/TDS probe, helping extend the useful life of the meter without replacing the complete instrument.

The compatible replacement electrode is the Milwaukee MI59P, designed for both the EC59 PRO and EC60 PRO.

The probe can be replaced by unscrewing the retaining ring and fitting a new electrode.

For reliable measurements, rinse the probe with clean water after use and follow the manufacturer's maintenance recommendations.

Waterproof, practical design

Designed for use around water, the EC60 PRO features an IP65-rated waterproof housing and a floating casing.

Additional features include:

• Automatic one-point calibration.

• Automatic temperature compensation.

• Adjustable temperature compensation coefficient.

• Dual-level LCD display.

• Measurement stability indicator.

• Battery level indicator.

• Hold function.

• Automatic shut-off after approximately eight minutes of inactivity.

• Temperature display in °C or °F.

• Replaceable measuring probe.

Technical specifications

Specification	EC60 PRO
EC range	0.00–20.00 mS/cm
EC resolution	0.01 mS/cm
EC accuracy	±2% of full scale
TDS range	0.00–10.00 ppt
TDS resolution	0.01 ppt
TDS accuracy	±2% of full scale
Temperature range	0.0–60.0°C / 32.0–140.0°F
Temperature resolution	0.1°C / 0.1°F
Temperature accuracy	±0.5°C / ±1°F
Calibration	Automatic, one point
Calibration standard	12.88 mS/cm
Temperature compensation	Automatic, adjustable β = 0.0–2.4%/°C
Replaceable probe	Milwaukee MI59P
Operating environment	0–50°C
Waterproof rating	IP65
Batteries	4 × 1.5V LR44 / A76 alkaline
Battery life	Approximately 100 hours
Auto shut-off	After approximately 8 minutes

Understanding EC and TDS measurements

EC measures the electrical conductivity of water and is expressed in µS/cm or mS/cm.

TDS is an estimated value derived from conductivity using a conversion factor. Different conversion scales, such as 0.5 and 0.7, can produce different TDS readings from the same water sample.

For this reason, TDS readings from different meters may not be directly comparable unless the same conversion scale is being used.

For consistent aquarium monitoring, EC is often the more useful measurement to record and compare.

Supplied with

• Milwaukee EC60 PRO meter.

• Replaceable EC/TDS probe.

• Protective cap.

• 12.88 mS/cm calibration solution sachet.

• Four batteries.

• Instructions.

Recommended accessories

• Milwaukee MI59P replacement probe – replacement EC/TDS electrode compatible with the EC59 PRO and EC60 PRO.

• Milwaukee MA9060 calibration solution – 12.88 mS/cm conductivity calibration solution in a 230 ml bottle.

• Milwaukee M10030B calibration sachets – 12.88 mS/cm calibration solution in convenient individual sachets.

• Milwaukee MA9016 cleaning solution – helps maintain the measuring probe.

The Milwaukee EC60 PRO is a versatile choice for users who need a waterproof conductivity and TDS tester with a wider measurement range, replaceable probe and simultaneous temperature display.