TDS meter 0 - 9990 ppm digital pH meter 0.01 pH high-precision pen-type water tter TDS & PH meter 0 - 14 pH LCD PPM tter aquarium filter

Digital TDS meter temperature pen water purity PPM filter hydronic aquarium pool water monitor teer 0 - 9990 ppm
Description:
Material: Plastic
It can test the purity of water at any time.
Waterproof design, with lower power consumption.
Accurately detect the purity of water in your home.
Simple to use, just click once to know the water quality, convenient for home use.
Lock function: Manually lock the measurement value for easy reading and recording.
Automatic shutdown function: Automatically shuts down after 5 minutes, no need for any operation, saving battery power. 
Note:
Measurement range: 0 - 9999 ppm (display 3 digits; above 999 ppm, display *10)
Temperature range: 0 - 80°C
Battery: 2 x LR44 1.5V button cells (included) 
The package includes: 
1 x TDS instrument (including battery)