Milwaukee T75 Waterproof TDS Tester

This high-quality measuring device is used to determine the TDS value in the water in aquariums, water treatment systems, etc. The TDS value shows the total amount of solids (TDS) dissolved in the water such as salts, minerals and metals. This allows operators to determine how conductive or how nutrient-rich the water is. An indispensable device for species-appropriate plant and animal husbandry.

Features:

• Measures total dissolved substances directly and with automatic temperature compensation
• Easy to read LCD display
• Ideal range for aquariums (0 to 1999 ppm)
• Units in ppm can easily be converted to uS/cm
• Pre-calibrated with the ability to re-calibrate if required
• 250 hours of continuous use (3 x 1.5V batteries included)
• Easy one-point calibration
• Fully waterproof to IP65
• Replaceable TDS Electrode MA73075

Note from the manufacturer:
TDS/PPM is often converted to uS/cm. The different scales include the 500 scale, the 650 scale, and the 700 scale
Your TDS/PPM readings can be roughly converted to uS/cm, for example:
1 ppm = 2 µS/cm on the 0.5 scale
1 ppm = 1.43 µS/cm on the 442 scale or the 0.70 scale