TP-3 - simple, with not replaceable electrodes, lower accuracy than in meters.
100 Series (CP-105, CPC-105 or CX-105) - pocket size, for field work.
410 Series (CP-411, CPC-411 or CPR-411) - for field and laboratory work.
450 Series (CP-451) - for field and laboratory work, colour touch screen.
400 Series (CP-401, CPC-401, CPO-401 or CX-401)- for field and laboratory work, high accuracy, many additional features.
460 Series (CP-461, CPC-461, CRC-461 or CX-461) - for field and laboratory work, in case of multifunction meters simultaneous measurement and result observation of up to 4 functions, color touch screen.
510 Series (CP-511 or CPC-511) - for laboratory work.
500 Series (CP-505, CP-502, CPC-505, CPC-502, CPO-505, CPO-502, CPI-505, CPI-502, CX-505 or CX-502) - for laboratory work, high accuracy, many additional features.
660 Series (CP-661 or CPC-661) - for laboratory measurements, color graphic touch screen.
600 Series (CPI-601 or CX-601) - for laboratory measurements, high accuracy, in case of multifunction meters possibility of simultaneous measurement and result observation of up to 5 functions, color graphic touch screen.
700 Series (CX-705) - for laboratory work, also field version available, highest accuracy, large, color graphic touch screen. Possibility of simultaneous measurement and displaying results of 7 functions, possibility of observing results in numerical or graphical form.