Tachometers DT-2234BL Laser PHOTO Tachometer 5 Digit Display, 10 mm (0.4") LCD, with function annunciation Measurement and Range of 10 to 99,999 RPM Resolution of 0.1 RPM (<1,000 RPM) 1RPM (≥ 1,000 RPM) Accuracy of ± (0.05% + 1 digit) Detecting distance of 50 - 2,000 mm typically Laser light source of less than 1 mW, Class 2 laser diode. Red. Wave length is approximately 645 nm Time base is Quartz Crystal, 4.194 MHz Circuit is Exclusive Chip of Microcomputer LSI Circuit 0 to 50°C Temperature (32°F to 122°F) Less than 80% RH Operating Humidity Memory with recall function, last value, maximum and minimum values will be stored into the memory automatically Uses 4 x 1.5V AA (UM-3) battery Approximately DC 20 mA Power Consumption 190 x 72 x 37 mm in size (7.5 x 2.8 x 1.5 inches) Weighs 250g (0.55 lb) / including battery Includes manual, reflecting tape marks (600 mm), carrying case.   DT-2235B Contact Tachometer   Wide measuring range from 5 to 100,000 RPM. 0.1 RPM resolution for the measured value < 1000 RPM. The last value, max. value, min. value will be stored into the memory automatically & can be obtained by pressing Memory Call Button. Highly visible LCD display gives RPM reading exactly with no guessing or errors & saves battery energy. This tachometer uses the exclusive one chip Micro-Computer LSI circuit & crystal time base, offering highly accurate measuerment & a fast sampling time. The use of durable, long lasting components, including a strong, light weight ABS plastic housing, assures almost maintenance free performance for many years. The housing cabinet has been carefully shaped to fit comfortable in either hand.   LDT1236BL Photo/Contact Tachometer   Laser light detecting source, long measuring range up to 2 meters, it is useful in the RPM measurement application where the machine would be a risk to the operator or close access is difficult or not possible. The best Tachometer in the world. 2 in 1, one instrument combines Photo Tachometer & Contact Tachometer. Wide measuring range from 0.5 to 100,000 RPM, 0.1 RPM resolution for the measured value < 1000 RPM. Microprocessor based circuit, crystal time base, high precision with 0.05% accuracy. High visible LCD display gives RPM reading exactly with no guessing or errors & saves battery energy. Memory with recall function, the last value, max., value, min. value will be stored into the memory automatically. The use of durable, long lasting components, including a strong, light weight ABS plastic housing, assures almost maintenance free performance for many years. Patent patented.

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