Multifunction 5-in-1 Water Quality Tester: pH, TDS, EC, Salt & Temperature Sensor

The M51 water quality tester is a simple, reliable way to check the condition of your water. It measures pH, TDS (total dissolved solids), EC (electrical conductivity), salinity, and temperature — giving you five key readings in one compact device.

A sensitive probe and built-in temperature sensor ensure accurate results, while automatic temperature compensation keeps readings stable across different environments. The backlit LCD screen makes it easy to see your measurements clearly, even in low light.

Weighing just 95 g, the M51 is light enough to carry anywhere. Whether you’re testing aquarium water, a hydroponic setup, a fish pond, pool water, or even your household drinking water, this tester is built to give you quick answers you can trust.

Why Choose the M51?

1. Measures pH, TDS, EC, salinity, and temperature in one device.
2. Accurate readings with automatic temperature compensation.
3. Clear, backlit LCD display for easy viewing.
4. Portable pen-style design — only 16 cm long and 95 g in weight.
5. Suitable for aquariums, pools, hydroponics, aquaculture, labs, and drinking water.

M51 Water Tester: A compact, accurate, and easy-to-use tester that goes wherever you need it.