Solinst 3001 [114620] Levelogger 5 M200 LTC Water Level & Conductivity Logger, 200 m (656.2 ft.) Range. The Levelogger® 5 LTC logs water level, temperature, and conductivity. It combines a datalogger, 8-year battery, Hastelloy®pressure sensor, temperature detector, and conductivity sensor within a small waterproof housing, 22 mm x 208 mm (7/8" x 8.2").A baked-on coating using polymerization technology protects the body against corrosion, abrasion and high temperatures.The conductivity sensor is a 4-electrode platinum sensor, with autoranging capabilities. The minimal-maintenance, sealedLevelogger 5 LTC is simple to clean and calibrate, even in the field.