ATO 5 in 1 water quality tester offers wide measurement ranges with accurate pH, TDS, salt, sg, and temperature monitoring. With WiFi connectivity and mobile application support, it enables 24-hour online tracking, remote data access, and easy data export. Suitable for a wide range of applications including hydroponics, pools, aquaculture, tap water testing, labs, and industrial wastewater.
Specification
| Model |
ATO-WQM-397 |
| Measuring Range |
pH |
0~14pH |
| TDS |
0~19900ppm (0~199.0ppt) |
| Salinity |
0~199.0ppt |
| S.G |
0.990~1.400 |
| Temperature |
0~50°C (32~122°F) |
| Resolution |
pH |
0.01pH |
| TDS |
1ppm (<1999ppm); 10ppm (>1999ppm) |
| Salinity |
1ppm (<1999ppm); 10ppm (>1999ppm) |
| S.G |
0.001 |
| Temperature |
0.1°C (0.2°F) |
| Accuracy |
pH |
±0.1pH |
| TDS |
±2%F.S |
| Salinity |
±2%F.S |
| S.G |
±2%F.S |
| Temperature |
±1.0°C |
| Temperature Compensation |
0~50°C |
| Operating Temperature |
0~50°C |
| Other |
Input Voltage |
DC 6V |
| Weight |
520g |
Features
- 5 in 1 Measurement: Combines pH, TDS, salinity, specific gravity, and temperature into one multifunctional device for efficient, multi-parameter water quality analysis. Ideal for users seeking a digital water quality tester with comprehensive detection.
- WiFi Online Monitoring: Enables real-time WiFi connectivity with app-based remote viewing, data logging, and trend tracking. Provides a smart water quality monitoring solution for continuous and automated oversight.
- Wide-Range Measurement Performance: Covers various water environments from household to industrial use, delivering high resolution and stable readings.
- Automatic Temperature Compensation: Automatically adjusts measurement values based on ambient temperature, ensuring consistent high accuracy and improved water quality measurement precision under changing conditions.
- Multi-Scenario Applicability: Suitable for hydroponics, swimming pools, aquaculture, tap water, laboratories, and industrial wastewater testing, making it a versatile multi-parameter water testing equipment for home and professional use.
Dimension

Details
Connect ATO multifunction 5-in-1 water quality tester to the mobile app to check real-time water quality anytime and anywhere. The app also tracks trends over time, making it easy to monitor pH, TDS, s.g and temperature remotely.

Applications
Widely used in hydroponics, swimming pools, aquaculture, tap water inspection, laboratory testing, and industrial wastewater treatment, supporting accurate monitoring across various water quality conditions.

Tips: How Can ATO 5 in 1 Water Tester Improve Water Quality?
ATO 5 in 1 water quality tester improves water quality by measuring pH, TDS, salinity, specific gravity, and temperature simultaneously, giving a complete picture of water conditions. Accurate readings help detect imbalances early, such as nutrient levels in hydroponics, salinity and density for aquaculture, or pH for pools. Temperature monitoring ensures safe conditions for plants, fish, and chemical stability. With WiFi connectivity and a mobile app, users can monitor data remotely, track trends, and export results for analysis. This allows timely adjustments to maintain safe, healthy water in hydroponics, pools, aquaculture, and other applications.