... 128 LCDh) Interface: RS-232i) Working temperature: 15 - 30°C j) Working humidity: 10 - 90°Ck) Power supply: 220VAC ... dimensions: 35(D)mm x 57(W)mm x (2")m) Dimensions: 37(L) x 20.7(W) x ... 5(H)cm 9) Series:a) GE200A: K+, Na+b) GE200B: K+, Na+, Cl-c) GE200C: K+, Na+, Cl-, Ca++, Tca, PHd) ... GE200D: K+, Na+, Cl-, Ca++ e) GE200E: K+, Na+, Cl-, ...