Fluke 931 optics (non-contact) measurement speed:1 to 99,999 rev / min Contact measurement speed:1 to 19,999 rev / min Fluke 931 Precision:± 0.02% of reading + 1 digit Optical sensing distance:500 mm Storage Temperature:-20°C to 70°C Weight:250 g (with batteries) Dimensions:175mm x 60mm x 28mm
