TACHOMETER HT-5500 is a handheld digital tachometer with high performance and pioneering technology at the sophisticated body. It can be operated easily as both contact and non-contact type digital tachometer, which various rotation measurement technology are equipped. Various measurement parameters such as rotation (r/min, r/s), accumulated rotation (count), line speed (m/min: contact and non-contact, mm/s: contact) and period (ms) can be measured. Both the analogue signal output and pulse signal output are available as standard. Analogue signal is used for recording the rotational data at data recorder etc. Pulse signal is used as external sampling signal at FFT analyzer for tracking analysis. Wide measurement range with high technical functions from 6.0 r/min (low-speed rotation) to 99999 r/min (high-speed rotation) is provided.   Features Wide measurement range from 6.0 r/min (low-speed rotation) to 99999 r/min (high-speed rotation) â–  Lo range 6.0 to 600.0 r/min â–  Hi range 6 to 99999 r/min Capable of both contact and non-contact measurement in one unit Built-in memory function - 20 data (MAX) can be saved to memory. Line speed measurement is possible by setting the diameter of rotational object even though it is non-contact measurement. (Circumferential ring such as KS-100/KS-200 should be attached at HT-5500 when it is contact measurement.) Accumulating rotation can be measured. (1 pulse/rotation by contact measurement. 1 count/1 reflection mark to 9999 is possible by non-contact measurement Both analog and pulse outputs provided as standard â–  Analog output 0 to 1 V/0 to F.S. (Full scale can be set arbitrarily), 10-bit D/A conversion â–  Pulse output Hi level = At least +4.5 V, Lo level = Up to +0.5 V Hold function of Max. and Min. values of rotation, period and line speed. Large LCD with backlight Can be mounted on a tripod   Accessories Contact adapter (HT-0502) 1  Contact tip for rotation measurement (KS-300) 1  Circumferential ring (KS-200) 1  Reflective marks (12-mm square; 25 pcs.) 1 sheet  AAA alkaline batteries 4  Carrying case 1