Solinst Model 107 [114809] TLC Temp / Level / Conductivity Meter With  3/4" Probe & Metric Increments, 400m. The Solinst TLC Meter is ideal for profiling conductivity and temperature in wells and open water. It displays accurate measurements of conductivity and temperature on a convenient LCD display. Conductivity measurements are read from 0-80,000 uS/cm with readings giving accuracy of 5% of reading or 100 uS (whichever is greater). Water level and probe depth measurements are read off the Solinst durable PVDF flat tape, which is accurately laser marked every 1/100 ft or each millimeter. Tape lengths are now available up to 1000 ft (300m). The high quality PVDF flat tape reels smoothly, remains flexible and hangs straight in the well, irrespective of temperature. The flat tape is mounted on a sturdy, well-balanced Solinst reel, with a convenient battery drawer for the 9 Volt alkaline battery. Permanent laser markings each 1/100 ft or millimeter allow accurate readings. Stranded stainless steel conductors and copper coated stainless steel conductors resist corrosion, provide strength and are non-stretch. They make the tape easy to repair and splice. The dog-bone design reduces adherence to wet surfaces. The Solinst TLC Meter uses a ‘smart’ conductivity sensor with platinum electrodes to measure conductivity. The conductivity is displayed on the screen along with the associated temperature measurement. The ‘smart probe’ displays conductivity that has been standardized to 25 C, i.e. Specific Conductance (displayed as EC). The conductance temperature coefficient is 2.0% per C. Calibration is simple, using 1413 uS, 5000 uS, 12,880 uS, and/or 80,000 uS solutions for 1, 2, 3, or 4 point manual conductivity calibrations.