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Accurate and Reliable Measurements
This digital water tester is equipped with a high-precision chip and a high-quality titanium alloy probe, ensuring the accuracy and stability of water quality testing, making it a reliable tool for water quality testing.
Upgraded 4-in-1 Functionality and Auto Shut-Off
This digital TDS tester features a 4-in-1 design, allowing a single water quality testing pen to measure TDS (Total Dissolved Solids), EC (Electrical Conductivity) and temperature (°C/°F). After completing a measurement, the TDS tester will automatically shut off within five minutes if no further operations are performed, saving power and enhancing convenience.
Large Backlit Screen
This digital water tester features a large backlit display screen, allowing for easy reading even in low-light or dark environments. When the measurement value exceeds 40 ppm, the screen will display a red alert. When the measurement value is below 40 ppm, the screen will display green.
Easy to Use
First, remove the protective cover, then press the power button to turn on the meter. Immerse the digital water tester in water, ensuring the depth does not exceed 1.6 inches. Finally, wait for the display to stabilize. The TDS tester automatically compensates for temperature changes. Once the reading stabilizes (10–30 seconds), press the “Hold” button to remove the TDS tester from the water and view the reading.
Wide Application
This digital TDS tester can not only test the purity of drinking water to ensure that the TDS value is within the normal range, but also test daily water use, hydroponic plants (testing nutrient solutions), swimming pools, and hot springs. You can also use it to test whether water filtration systems (such as reverse osmosis (RO)/DI systems, microfiltration machines) are functioning normally and whether the filter cartridges need to be replaced.

RO Membrane Water Purifier
Other Domestic Water
Tap Water
Specification
Brand: Hydrofast
Type: Digital Water Tester
Model: A2S
Color: White + Black
Material: Food-Grade Plastic (Shell)
Measuring Range:
TDS: 0~9990ppm
Conductivity: 0~9990us/cm
Auto Shut-Off: 5 minutes
Operating Temperature: 0-99℃ & 32-212℉
Accuracy: ±0.1℃
Power Source: 2x1.5V LR44
Smart Functions: Auto Checking & Lock
Product Weight: 53g
Product Size (H×W×D): 155×30×15mm
1 x Digital Water Tester
1 x User Manual















