Digital-MULTIMETER II Graupner 1960 With test leads and prods. Cordless optoelectronic rpm and voltage meter with digital LCD display. The handy instrument permits contact-less rpm measurements of 2-, 3- and 4 bladed airscrews, DC voltage checks in two ranges (up to 2 volt and 20 volt, respectively) and resistance checks up to 2 kh. A 9 V dry battery serves as power supply. Dimensions 185 x 70 x 25 mm. Weight, approx 195 g Measuring ranges 2 pales/2-blade rpm, 100 ... 60 000 rpm, Reading accuracy 100 rpm
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