contact tachometers DT-105A-S12 DT-107A-S12 (LCD) (LED) Superior accuracy in high speed measurement Possessing the same sophisticated features and accessories as our renowned DT-105A/107A models, the DT-105A-S12 and DT-107A-S12 tachometers provide outstanding accuracy in measuring speed and direct linear length via a 12" wheel. The larger wheel rotates more slowly than a standard 6" wheel, thus enabling confident and safe high speed measurement. Features Specifications MODEL Measuring Range Accuracy DT-105A-S12 / DT-107A-S12 0.10 - 25,000 rpm with floating decimal 0.06 rpm : 0.10 - 999.9 rpm / 0.6 rpm : 1,000.0 - 9,999.9 rpm / 0.006 % of reading 1 digit (or 2 rpm max.) : 10,000 - 25,000 rpm Display 5 digit 0.47" (12 mm) high LCD 5 digit 0.4" (10 mm) high LED Measuring Units Revolutions : rpm, rpm Feet : fph, fph Miles : mph Yards : yph, ypm Inches : ipm Meters : mPH, mPM Length : m, cm, inches, feet, yards Total Revolutions : REV Memory 13 readings are stored in memory and retained for 5 minutes (last, max., min. and 10 extra measurements) Display Update Time 1 second (typical) Detection Optical coupler, 60 pulses/rev. System Control Single-chip C-MOS microprocessor Over Range Indicator Flashing numerals Voltage Requirement 2 AA 1.5 V batteries Low Battery Indicator Flashing "LO BAT" display "B" display (DT-107A-S12) Auto Power Shut-Off Yes Battery Life 40-60 hrs approx. 25 hrs approx. (DT-107A-S12) Operating Temp. Range 32 - 113 F (0 - 45 C) Operating Environment Non corrosive Decimal Point Floating Construction Die-cast aluminum housing Weight 0.9 lb (400 g) Dimensions 7.2" L x 2.4" W x 1.8" H (182.5 mm x 60 mm x 46 mm) Warranty 1 year Standard Accessories 2 cone adapters, funnel adapter, 3-1/2" extension shaft, NIST certificate, carrying case, master wheel (12" cir.) Optional accessories FPM-12CBL / 12" grooved wheel * 12" circumference wheel * 1/4 x 20 mounting hole * Multi-mode speed selection * Outstanding accuracy (0.006% of reading) * Rugged aluminum construction * Direct length measurement * Extensive speed range (0.10 - 25,000 RPM) * Large 5 digit display * Length/ sec available * Large 10 test memory capacity; plus LAST, MAX and MIN * Total revolution display * Free N.I.S.T. certificate * CE mark * Overspeed indicator DT-107A-S12 shown in carrying case, with 12" circumference wheel 1701 Glenlake Avenue Itasca, IL 60143 * p: (800) 237-7079 * f: (630) 924-0342 * www.shimpoinst.com { { INSTRUMENTS 11