Welcome to Okmarts !
Conductivity：0 to 200 mS/cm (auto-range) Salinity：0 to 70 ppt； Temperature：-5 to 55°C； TDS：0 to 100 g/L TDS constant range 0.30 to 1.00 (0.65 default)
You can enjoy free shipping when your total purchase value is greater than or equal to
$300 (a few items excluded).
Specific rules click to view detail
We promise if you find there are quality problems with the goods received,
we can provide you with return and exchange services.
Our telephone customer service staff work online form 9 am to 5 pm working days (Monday to Friday,Beijing Time).
We promise that all the products you buy on your platform are genuine.