③ Gently stir the pen in the test solution until the reading stabilizes. The reading will be fixed on the display screen within 2 seconds. Press the HOLD button to lock it;. ② Place the pen into the solution to be tested, and the height of the solution should not exceed 4cm; (Starting from the pen).
eBay
10 in 1 PH/TDS/EC/SALT/TEMP/S.G/ORP/H2/Fertile/Resistivity Water Quality Monitor Tester for Pools,
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.
eBay
8-in-1 Multifunction Water Quality Meter Digital WiFi PH EC TDS SALT SG.Temp ORP CF Tester Smart
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
Bluetooth App PH Meter 6 in 1 Water Quality Tester Pen PH EC TDS Salinity SG Temp for Drinking Water
Aliexpress UK
Shift between TDS and Conductivity. Can be used in : Water purifiers and filters, food(vegetable, fruit)&drink quality monitoring, pools and spas, aquarium, hydroponic. Accuracy: ±2%. Press the switch ,place the electrode into the testsolution.
eBay
Professional Water Quality Tester 5 In 1 TDS/PH/EC/Temp /Salinity Meter Water Analyzer for Pools
Aliexpress UK
Manufacturer: Bestgle. Feature: - Automatic Temperature Compensation (ATC): automatically change the value of the value of 25 ℃. - One button (HOLD) lock the testing result. - Automatic shut-off after 5 minutes with inactive.
eBay
Digital Water Quality Purity Filter TDS Meter LCD Display TDS Tester 0-9999 PPM Temp Pen Design For
Aliexpress UK
There are 4 modes are: TDS temperature, EC temperature, TDS Fahrenheit, EC Fahrenheit, the lower right corner is the temperature display. - Support automatic temperature compensation, and the water quality test can shift between TDS and Conductivity.
eBay
TDS&EC Tester 3 In1 TDS/Temp/EC Meter 0-9990ppm Conductivity Detector Water Quality Monitor Purity
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.
eBay
yieryi New TDS PH Meter PH/TDS/EC/Temperature Meter Digital Water Quality Monitor Tester for Pools,
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. 1 TDS water quality detector. Alloy electrode probe, fast detection speed, sensitive response, more accurate conduction.
eBay
Digital Water Quality Monitor Tester TDS PH Meter PH/TDS/EC/Temperature Meter for Pools Drinking
Aliexpress UK