digital conductivity meter and ph meter , bench top digital conductivity meter with automatic temperature compdisplay 3½ digit led range, 0 to 200 micro mho. 2 millimho & 20 millimho 200millimho & 1000millimho or 0 to 20 micro mho to 0 to 200 millimho accuracy ± 1% ± digit indication direct reading of conductivity temp comp 0 to 780c automatictemp sensor pt-100 (rtd) osc frequency 50 hzinternally selectable cell cond cell of cell constant k=0.5 (approx) ps 230 v ±10% 50 hz make mettler, sistronic, thermoeutech, hach, thermoscientific , bench top ph meter ph range 0.00 to 14.00 ph ph resolution ±0.01ph ph accuracy ±0.01ph mv range ±333mv mv accuracy ± 1mv temperature range 0 to 1000c temperature accuracy± 10c calibration point 2 points ph buffer options nist (ph 4.00/6.86/9.18) temperature compensation 0 to 1000c manual or automatic make mettler, sistronic, thermoeutech, hach, thermoscientific