Rev-count sensor (optical) Optical rev-count sensor for determining the rotational speed of revolving components such as propellers, wheels, shafts ... Typical application: optimising the propeller size to match the electric motor Contents: Rev-count sensor with optical pick-up The following can be activated and altered using the MULTImate, or using Sensor Data Manager on the PC: Address Address (screen line on transmitter) at which the rotational speed is displayed Top alarm Upper rev count value, above which an alarm is triggered at the transmitter Bottom alarm Lower rev count value, below which an alarm is triggered at the transmitter Option Additional generation of minimum, average or maximum rotational speed Address option Address (screen line on transmitter) at which the optional value is displayed Blade count Number of propeller bladesSpecification: Measurement range 400 ... 50,000 rpm (3-blade propeller) Resolution 100 rpm Blade count 2, 3, 4, defined by jumper (variable within range 1 - 8 using MULTImate) Dimensions (L x W x H) 31 x 20 x 7 mm Weight approx. 10 g