Model RP 491 3 - 30V DC from Proximity Sensor, Photoelectric Non Contact Input Sensor, Encoder,Potential Free Contacts, Limit Switch etc., Input Speed 3.5 kHz (Max.) Range 0 - 9999 RPM / RPS / RPH Resolution 0.001, 0.01, 0.1,1 RPM / RPS / RPH (selectable) Relay Output 2 NO ,2 NC 5A Rated Relays(power ON Delay & Hysterisis provided) Re Transmission(optional) Opto isolated Analog output 4-20mA or 0- 10V DC Sensor Supply 12V DC (±10%) 50mA Accuracy ± 0.05 % (± 1 count) Display 4 Digit 0.5”seven Segment Red Led Working temperature 0 - 50 ºC Power Supply 90 to 270V AC / DC 50Hz Dimension 96 x 96 x 65 mm Weight 200 grams (Approx.)