Product Features: 
1. TDS Tester 
Measures total dissolved solids (TDS) and temperature 
Measurement Range: 0-9990 ppm, 0 degree-99 degree (only TDS-3), 32- 212 (only TDS-3) 
Accuracy: 2% Full Scale: ±1, ±2 
Digital Calibration (push button): Factory Calibrated 
Shuts off automatically after 10 minutes of non-use 
Automatic temperature compensation function: it can automatically change the displayed value into the value of 25 
High accuracy: Use the Titanium alloy probe which can avoid magnetic disturbance to test water and only has the error (± 0.1) 
Measuring temperature: 0 - 50 and it can be stored in the environment (- 30) 
LCD display screen: Big LCD display screen which has great waterproof performance and let you easily read the displayed value 
Fast measuring: can measure once in five seconds