TDS: 0-99999ppm. Sensitive probe purity instantly visible, press the switch, the test pen into the water to be tested, the lower the TDS value, indicating that the lower the content of total dissolved solids in the water, the purer the water quality.
eBay
50/100pcs 3/5/6/7 in 1 Swimming Pool PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool for Chlorine Bromine
Aliexpress UK
ATC Function:Automatic Temperature Compensation accounts for changes in temperature automatically. Lightweight and easy to carry. Remove the protective cover. Type: PH Tester. Accuracy: ±0.2PH; ±0.1PH (20°C).
eBay
Chlorine PH Test Strips SPA Swimming Pool Aquarium Fish Tank Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness
Aliexpress UK
Size: 15.7 3 1.6cm. Test pen 1. Color: white/yellow.
eBay
WiFi Intelligent Chlorin Meter 7 in 1 PH ORP EC Total Dissolved Solids Salinity Temp CL Test Meter Swimming Pool Water Tester
Aliexpress UK
It is a must-have item for family to test tap water, distilled water, bottled water and more. Multifunctional, practical and convenient. TDS range: 0-9990PPM. Conductivity range: 0-9990us/cm. Temperature range: 0.1-80℃.
eBay
50pcs Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness Test Strip
Aliexpress UK
ATC Function:Automatic Temperature Compensation accounts for changes in temperature automatically. Lightweight and easy to carry. Remove the protective cover. Type: PH Tester. Accuracy: ±0.2PH; ±0.1PH (20°C).
eBay
Tuya ZigBee Solar Powered 7 IN 1 Smart Chlorine Meter Chlorine/pH/TDS/EC/ORP/Salinity/TEMP Meter Swimming Pool Water Tester
Aliexpress UK
Before drinking a test, drinking water at ease, TDS on behalf of the total soluble solids content in the water, the lower the TDS value / the purer the water quality. PORTABLE DESIGN-- Handheld TDS tester pen style and makes it conveniently fits in your pocket or bag and goes anywhere.
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Soil Moisture Meter With LCD Display Plant Water Tester Plant Moisture Meter For House Plants and Outdoor Plants Battery Powered
Aliexpress UK
There are 4 modes are: TDS temperature, EC temperature, TDS Fahrenheit, EC Fahrenheit, the lower right corner is the temperature display. Press shift to switch between different modes. TDS test range: 0~9999PPM.
eBay
3/4/5/6/7 in 1 Swimming Pool PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool for Chlorine Bromine Pool Acces
Aliexpress UK
Whether it’s for your peaceful koi pond or a refreshing pool, ensure optimal water quality and peace of mind. Designed exclusively for saltwater pool and koi fish pond salt level testing. Not suitable for testing sea/marine saltwater fish tank levels or food salt levels.
eBay
50pcs/set Chlorine PH Test Strips, 5 in 1 Water Tester Paper, for SPA, Swimming Pool, Aquarium, Multipurpose Hardness Tool
Aliexpress UK