Ohaus ST10T-B TDS Pen Meter, Waterproof, 0-1000 mg/L auspowers_batchfive the diameter of screw head:

the diameter of screw head: 6mm

Tablet(Blue)

or as an external power using the AC-to-DC adapter and battery

Our factory direct sale waterproof license plate frame use special mixed waterproof glue

3 foot Kevlar reinforced cable

Ohaus ST10T-B TDS Pen Meter, Waterproof, 0-1000 mg/L auspowers_batchfive the diameter of screw head:Ohaus ST10T B TDS Pen Meter, Waterproof, 0 1000 mg L Ohaus pen meters provide accurate measurement of pH, oxidation reduction potential (ORP), conductivity, salinity and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement with no restriction. Each meter offers simple operation in a slim & portable design providing fast, straight forward results time