Feature Microprocessor based for fast and accurate measurements. Special viewing angle designed of waterproof housing IP 57 rated. It floats on water. Large LCD display pH or ORP or Conductivity or TDS or Salinity or DO and Temperature Simultaneously. Simple to calibrate by one keyboard and automatic temperature compensation(ATC), Manual Salinity(MSC) and Altitude(MAC) Compensation. Multi-functions with Data-hold, Max/Min and shows PTS after calibration. Degree ℃/℉ are switchable. Low battery and consumption indicator. Auto power shut off after 10 minutes of non use. Easy to replace electrode module, and the type of electrode would be recognized automatically and shown in display during insertion. Specifications     7200 7011 7021   pH mV Temp.  Cond. TDS Salt Temp. Range  -2 ~ 16.00  -1000 ~ 1000  0 ~ 90 ℃  0 ~ 2000 μS  2.00~20.00 mS  0 ~ 1300 ppm  1.30 ~ 13.00 ppt  0 ~1000 ppm  1.00 ~ 12.00 ppt  0 ~ 90 ℃ Accuracy  ± 0.01 + 1digit  ±2 + 1digit  ± 0.2 + 1digit ± 2% FS ( Cond., TDS, Salt)  ± 0.2 ℃ +...