ATO portable TDS water quality tester offers wide measurement ranges with automatic temperature compensation for consistent results. It features smart auto-shutoff after 5 minutes of inactivity, extending battery life. Weighing only 47g, it’s portable and perfect for use in home water, agricultural irrigation, aquaculture, and industrial wastewater analysis.
Specification
| Model |
ATO-YW-662 |
| Accuracy |
±2%F.S |
| Measurement Range |
TDS |
0~9999ppm |
| Conductivity |
0~9999μS/cm |
| Temperature |
0~50℃, 32~122°F |
| Unit |
TDS |
ppm |
| Conductivity |
μS/cm |
| Temperature |
℃, °F |
| Resolution |
TDS |
1ppm |
| Conductivity |
1μS/cm |
| Temperature |
0.1℃ |
| Operating Environment |
Temperature |
0~50℃ |
| Humidity |
≤85% RH (Non-condensing) |
| Storage Environment |
Temperature |
0~50℃ |
| Humidity |
≤85% RH (Non-condensing) |
| Others |
Power Supply |
1 x 3V CR2032 Lithium Manganese Battery |
| Dimensions |
1583116mm |
| Housing Material |
ABS |
| Weight |
Approx. 47g (Battery Excluded) |
Features
- 3-in-1: Measures TDS, EC, and temperature, offering a comprehensive analysis of water quality for home and professional use.
- High precision and corrosion-resistant: Ensures accurate water testing with corrosion resistance and high sensitivity, ideal for both fresh and saltwater.
- Simplified Functionality: Each button corresponds to a single function, making it easy to navigate through the testing process with clear, intuitive controls.
- Energy Saving: Automatically powers off after 5 minutes of inactivity, extending battery life for long-term use.
- Portable and Lightweight: Weighs only 47g, making it perfect for portable water testing in various environments like agriculture and aquaculture.
Details

How to Use
Power on the device and place the tester into the solution to be tested.

Wait for the reading to stabilize, then press the “Hold” button to view the value.

Application
ATO TDS water quality tester is suitable for various applications including home water quality testing, agricultural irrigation management, aquaculture water monitoring, and industrial wastewater testing. Its stable performance and portable design allow it to adapt easily to different water sources and testing environments.

Tips: What is TDS in water quality tester?
TDS (Total Dissolved Solids) is a critical parameter in water quality analysis, used to measure the total amount of dissolved substances in water, including minerals, salts, organic compounds, and metals. TDS is typically measured by the water's electrical conductivity, with higher levels of dissolved substances resulting in higher conductivity and TDS values. TDS directly impacts the taste and quality of water. High TDS water may have an unpleasant taste and could pose health risks, particularly if it contains excessive harmful substances. Regular monitoring of TDS is essential in residential, agricultural, and industrial settings, as it helps assess water quality, select appropriate filtration systems, and protect equipment from mineral buildup. Generally, water with TDS below 100 ppm is considered pure, while TDS levels between 100–500 ppm are typically safe for drinking.