Oakton TDSTestr 11 dual-range, pin-style pocket TDS tester

Never watch a tester sink to the bottom of your tank or pond! These waterproof testers float, so there's no need to worry. Valox® housing and stainless steel electrodes offer good chemical compatibility and durability. Instrument features a replaceable sensor. Reuse the meter body many times without losing waterproof and dustproof protection. What's Included: protective plastic storage case, lanyard, and batteries. Dual-range measurements increase application range Replaceable sensor prolongs the life of your instrument Single or one point per range calibration Auto shutoff, low-battery indicator, error messages