Oakton CTSTestr 5 Pocket Tester

Conductivity, salinity, and TDS all in one meter
3-point calibration with automatic recognition of standards
Large easy-to-read LCD features two-color backlight
Rugged IP67-rated housing is waterproof, dustproof, and floats in water when sensor cap is on
Leakproof cap with fill line functions as a sample/calibration and hydrating cup
Secure—attach a lanyard to prevent losing or dropping in the field
Auto shutoff extends battery life
Measures conductivity, TDS, salinity, and temperature

Conductivity Range: 0.00 mS/cm to 20.00 mS/cm

TDS Range: 0.0 ppm to 10.0 ppt

Salinity Range: 0.0 to 10.00 ppt

Temperature Range: 0 to 50°C