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
TDS Digital Salinity Tester/Meter For Salt Water Pool & Fish/Koi Pond Testing Household Drinking
Aliexpress UK
Press shift to switch between different modes. NOT PH TESTER FUNCATION. 1 x Water Quality Tester Pen. 3.5 minute automatic shutdown. Save electricity and extend battery life. ③ After the value stabilizes, press the HOLD key and take out the reading.
eBay
TDS Digital Salinity Tester/Meter For Salt Water Pool & Fish/Koi Pond Testing Household Drinking
Aliexpress UK
Multi purpose tds tester: tests the purity of drinking water to ensure its safety and health, monitors whether the reverse osmosis (RO)/deionization (DI) system is working properly, whether filters need to be replaced, maintains aquariums, hydroponics (tests nutrient content), wells, swimming pools, hot tubs, spas, and tests tap water, bottled water, etc.
eBay
2pcs TDS PH Meter Digital Water Tester 0.01ph High Accuracy PH Meter 0-9990ppm Temperature TEMP PPM
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
0.0-14.0 TDS/EC Meter PH Digital Water Tester PH 0-9990ppm TDS&EC LCD Water Purity PPM Filter
Aliexpress UK
Backlit version, displaying green when TDS value is less than 50 and red when TDS value is greater than 50. TDS：0-9999ppm. Press shift to switch between different modes. This is a TDS&EC testing pen.
eBay
New Blue-tooth 7 in 1 PH/TDS/EC/ORP/Salinity /S. G/Temperature Meter Water Quality Tester for
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
7 in 1 Tuya Zigbee Swimming Pool Water Quality Tester PH ORP EC TDS Salinity Temperature CL Test
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
Online Digital Water Quality Tester TDS EC Meter Dual Probe TDS/EC Tester Total Dissolved Solids
Aliexpress UK
Results.Versatile Usage: Ideal for drinking water, tap water, well water, swimming pools, aquariums, and hydroponics systems. Key Features Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
eBay
HM Digital Online Water Quality Tester LCD TDS/EC Meter us/PPM Detection EC Detector Inlet Outlet
Aliexpress UK