10 Best Limescale Tester for 2025

Proster

• Multifunctional-- Can Be Used to Test TDS, EC and Water Temperature Accurately. Ideal to Test Water Quality or Purity for Water Purifiers, Water Filters, Drinking Water, Drinks, Pools, Spas, Aquarium, Hydroponics, Etc.
• Wide Measurement Range-- EC: 0~9990us/cm. TDS: 0~9990ppm. Temperature: 0.1~80.0℃/ 32.0~176.0°F.
• Accurate Measure-- The Accuracy is ±2%. Automatic Temperature Compensation Makes The Measure Result More Accurate and Reliable.
• Low Power Consumption-- Automatically Turn Off. Powered by 1*CR2032 Battery (Included).
• Convenient Design-- Data Hold Function. Large LCD Screen to Show Water Temperature, TDS or EC Instantly.

HQXHB

• High Accuracy & Easy Use: Maximum tolerance less than +/- 0.02 and come with an easy operating step.
• Small Size: Easy for people to carry with its mini elegant look and lightweight, this ppm meter takes up really little more than its advantage.
• Fast Read & Auto-off Function: With the smart detecting chip, it can be read on the TDS meter digital screen in one second. And the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
• Wide Use: 0-9990 PPM testing range. Ideal tool for testing household drinking water, aquariums, purification, RO/DI systems, hydroponics (test your nutrients) etc.
• Long Using Life: Lithium ion battery applied to years of long life for our digital TDS meter , and 30 days of free return / change & 3 years quality warranty period.

Watersafe

• Get professional lab results in your own home
• All in one test - super value
• Test for Bacteria, Lead, Nitrates, pH, Hardness, Chlorine and Pesticides
• A comprehensive water test kit
• Results on the spot

Essentials

• Accurate and rapid pc measurement
• Water resistant, shock and drop proof
• Energy saving shut-off and battery warning
• Minimum lifespan of about 1 to 3 years depending on the rate of sampling
• Digital calibration at the push of a button and a lit screen for when under dark foliage

IDEALHOUSE

• What is TDS: Total Dissolved Solids, are inorganic compounds that are found in water such as salts, heavy metals and some traces of organic compounds that are dissolved in water.
• Function of TDS meter: NSF International stated a TDS meter is not necessary. However, it can certify whether there are some excessive contaminants like heavy metals.
• Accuracy of test value: might vary with temperature of water and switch in different water source.
• Scientific Ways to safely purify water: boiling is one of the most reliable way. Another is using a water filter.Filtration and purification is an effective way to remove these chemicals out from our drinking water.
• Scientific Ways to safely purify water: boiling is one of the most reliable way. Another is using a water filter.Filtration and purification is an effective way to remove these chemicals out from our drinking water.

Smandy

• 【Usage】-- Our PPM tester pen can test the impurities in water such as some elements of soluble salts, ionic organic compound, heavy metal ion, etc, help you drink the safe and pure water, protect your health. Check the performance of your water filter and the hardness of the water you drink.
• 【Widely Used】-- The TDS meter can be used in : water purifiers and filters, widely used for food processing (vegetable, fruits), drink quality monitoring, aquarium, fish hatcheries, laboratory, schools, colleges, swimming pools, etc.
• 【Measuring Principle】-- TDS meter measuring principle is to measure the electrical conductivity of water and indirectly reflects the TDS value.
• 【Hold Function】-- It supports hold function that can save measurement results for easy reading and record.
• 【Automatic Power-off】-- Automatic power-off function allows it to power off after 5 minutes without any operation in order to save power.

HM Digital

• Measures total dissolved solids (TDS)
• Measures temperature
• Waterproof housing

KINCREA

• ♥High Accuracy: With premium quality titanium alloy probe and ACT(Automatic Temperature Compensation) function, the water quality tester reads accurately at various temperatures.★★★In a cup of water, Affected by factors such as battery power, there may be a slight error in the value.★★★
• ♥3 in 1 Function: This TDS meter can test TDS，EC and temperature. Its measuring range of TDS is 0-9999 ppm with accuracy: ± 2%, while the EC range 0-9999 us/cm and the temp range is 32.0-212°F- 0-99.0°C with accuracy ±0.1℃.
• ♥Auto Hold and Turn Off: The reading result will be auto-locked on LCD in seconds. To safe the power supply, the water tester will shut down automatically after 5 minutes stand by.
• ♥Upgrade LCD Backlit Display: Unlike traditional screen, the water tester designed with advance LCD backlit display, which is easier and clearer to be read. Kincrea product includes 1 year warranty.
• ♥Compact Design: Come with a leather case, this TDS meter is portable to be carry away. You can test water anywhere to get the purest drinking water.

YAMI

• Multi-function: Combines TDS meter,EC meter and Temperature meter all in one ergonomically designed pen. can be tested ppm, electrical conductivity, Celsius and Fahrenheit temperature.
• Reasonable Design: Intelligent backlight design, automatic lock function, large screen display for reading , automatic temperature compensation,auto-off in 2 Minutes to conserve battery.
• Auto-Lock &Hold Function: Can lock automatically for easy read and record after the reading result stabilized in seconds;Before reading locked automatically, the reading can be locked manually if press “HOLD”.
• Accurate & Easy to Carry: Exquisitely bare sensing element, can complete one accurate measurement in 5 seconds , pocket-sized and durable with Long battery life.
• Wide Application: Testing for tap water, filtered water, distilled water, bottled water, well water and refrigerated water. Widely for all Water Quality Testing, Water Purification Applications, Aquaculture, Hydroponic, Pool & Spa, Colloidal Silver, Water Treatment and more.

iSpring

• Advanced CPU: Automatically calibrated temperature; 0 - 9990 ppm TDS tester measurement range with 1 ppm accuracy
• Hold Button: Holds measurement value when meter is removed from water for convenient reading and recording
• Temperature Button: Tests water in Celsius and Fahrenheit; 31 - 200 F degree range, 1 F degree accuracy
• Auto-Off Function: Shuts off automatically after 10 minutes of inactivity to conserve battery life
• Comprehensive: Great tool for testing hard water contaminated with arsenic, lead, aluminum and other metals