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YSI 30 Conductivity / Salinity/ Temperature Meter

The YSI Conductivity, Salinity and Temperature meter is ready to use when you turn it on. A large, backlit display shows temperature along with conductivity, temperature compensated conductivity, or salinity at depths up to 100 feet. The YSI 30 lets you set the reference temperature and temperature coefficient if you're measuring temperature compensated conductivity. More details at YSI 30

Hanna HI 99300/1 Waterproof Conductivity & Temperature Meter

The HI 99300 and HI 993001 conductivity & temperature meters are economical waterproof handheld meters ideal for field spot checks. The HI 99300 (low range) and HI 99301 (high range) combine measurements of conductivity (EC), total dissolved solids (TDS) and temperature in a rugged waterproof housing. More details at
HI 99300/1

Pocket DiST 5 Waterproof EC/TDS Tester

The original DiST (Dissolved Solids Tester) was first introduced in 1986. Since then, the measurement of Conductivity and Total Dissolved Solids has never been easier. The DiST's ease-of-use in combination with its affordability made it the standard in EC and TDS measurement. More details at Pocket DiST 5