The new range of speed sensors from ifm electronic has the evaluation electronics integrated into the sensor housing. This allows for low cost and easy monitoring of rotating as well as linear movements with respect to over and under speed. The limit at which the output switches is set via a potentiometer or IO-Link. As compared to its predecessors, these new sensors feature a robust metal housing for flush mounting.
A special version with ATEX approval is available for which no additional impact protection is required.
Operating principle and application
The integrated inductive sensor is damped by passing cams or other metallic targets. The evaluation unit determines the period or the frequency (actual rotational speed) based on the time interval between damping and compares it to the set switch point. The output is switched during the start-up delay and when the rotational speed exceeds the set switching value. An LED signals under speed and switch-off of the output.
Especially in the field of conveying technology the compact speed sensors can be used for various applications, for example for monitoring belt conveyors or bucket elevators. They are typically used to monitor under speed, blockage or standstill.
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