The Lishtot TestDrop Pro, Better Than a TDS Meter

TDS meters measure the concentration of Total Dissolved Solids in a solution.

They were made popular by water filter manufacturers who use TDS meters to convince consumers their filters are working by demonstrating how the TDS reading goes down once the water is filtered.

But what do TDS meters actually tell us about water safety and quality?

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The simple answer, according to the NSF, is NOTHING at all.

TDS meters are good at one thing: testing for minerals. But they cannot distinguish between 'good' minerals that are meant to be in water (such as calcium, sodium, and magnesium) and 'bad' minerals that are actual contaminants. Also, TDS meters cannot test for other contaminants such as heavy metals like lead, copper, arsenic, and cadmium.

Enter the TestDrop Pro, the next generation of TDS meters.

The TestDrop Pro is the first personal water tester that actually tests for contamination instead of just minerals. Plus, it can distinguish between those 'good' and 'bad' minerals.

When you test with the TestDrop Pro, you are testing your water for actual harmful contaminants like Lead, Copper, Arsenic, bacteria (including E. coli), and many other types of chemicals and organic substances.

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TestDrop Pro

The TestDrop Pro is an essential tool for water testing. There is no other water tester on the market that can detect more than 20 of the most common water contaminants in just a few seconds. TDS meters are only testing for minerals, they are not able to discern water quality. With the TestDrop Pro, you can test before you drink for true peace of mind.

Features & Info




$49.95 per unit
+ Shipping
Immediate Results

Test water and get the results in two seconds

To Drink or Not to Drink?

Get a Blue light if the TestDrop Pro does not detect contamination and a Red light if contamination is found. It is not recommended to drink water that gives a Red light

Detects Good Water

The embedded algorithm is programed to show Blue when the sensor detects uncontaminated water. Otherwise it shows Red.

Three Buttons for Three Testing Levels

Each button is programed to show Blue at a different level of water purity LEARN MORE>>

Test Water in Any Plastic Disposable Cup

You can use PP, PET or PS clean, new, disposable cups for testing LEARN MORE>>

Test in Non-Transparent Cups

The disposable plastic cup does not have to be transparent LEARN MORE>>

Test Bottled Water

You can test bottled water without opening it LEARN MORE>>

Do Not Test in Glass Containers

Glass cups are thicker than plastic. Also, when you wash your dishes the soap leaves residue which is detected as contamination.

Innovative Technology

3 granted US patents

Passive Testing

The TestDrop Pro does not transmit any signal, it senses the electric field created by the interaction between the water and the cup

Tested by Third Party Labs

Validated by independent third party labs along with many other people and companies

Lishtot App (Beta)

Get your water score and historical data about the water you tested

Battery Has a Long Life Span

Uses standard 2032 Energizer battery which lasts for 5000 tests

Take it With You Wherever You Go

Portable, keychain size device goes with you everywhere you go

Test for Heavy Metals

Including lead, copper, arsenic, cadmium and more

Test Pathogenic Bacteria

Such as E.coli by detecting the proteins they release in the water

Test for Chemicals

Such as PFOS, PFOA and pesticides

Easy to Use

Watch our 2 minute video and become an expert tester. WATCH NOW