RPM Measurement
RPM Measurement
- LED measurement spot marking
- Optical rpm measurement
- Pocket sized, light and easy-to-use
- Easy-to-read, backlit display for use in all lighting conditions
Applications requiring the measurement of rotations per minute (RPM) can use low-cost, high-value sensor choices. The majority of these sensors serve as straightforward, dependable, and low-cost transducers for extremely complex control systems. Consider advanced sensor modules, various tachometer kinds for measuring RPM, and techniques for measuring frequency and period.
RPM Measurement: Sensors and Techniques
1. RPM sensors
To measure shaft speed, a sensor is required. Shaft (rotary type) encoders, photoelectric (optical type), and magnetic rotational speed (proximity type) sensors are frequently employed for this purpose. Electrical pulses are used by each of these sensors to transmit speed information. Shaft encoders provide a high resolution with symmetrical, well-defined pulses that range from 1 to 5000 pulses per revolution (PPR).
2. RPM measurement techniques
RPM can be calculated using either frequency measurement or period measurement, which are both extensively used techniques. While period measurement is preferable for slower-moving objects like shafts, frequency measurement is better for objects that move quickly, such motors and turbines. The number of pulses sensed per revolution (PPR) is the most important consideration when employing frequency measurement to monitor RPM. With high-PPR sensors, this approach performs admirably, but poorly with low-PPR sensors.
3. Tachometers
The Greek words “tachos,” which means “speed,” and “metron,” which means “to measure,” are the roots of the English term “tachometer.” A tachometer is a tool used to gauge surface or rotational speed through contact or without it. The rotational speed of motors, conveyor belts, and other moving or rotating systems is frequently measured using tachometers. There are three common ways to measure RPM when using a tachometer:
