KL-03(II) Waterproof Pen-type pH Meter Pocket sized and feather-weight for portable use in a large number of applications. It is utilize user-replaceable electrodes. KL-03(II) KL-03(II)L KL-03(II)A KL-03(II)B Technical Specification Model KL-03(II) KL-03(II)L KL-03(II)A KL-03(II)B Range 0.00~14.00pH Accuracy ?.1PH Resolution 0.01PH Operating temperature 0~50 Automatic Temperature Compensation 0~50 Plug Fixed Electrode Extended Fixed Electrode BNC+1m cable BNC Power Supply 4?.5V(AG13) Dimensions 165?6?6 mm 120mm?6mm?6mm Weight 63g 65g 70g 68g