What type of handheld tachometer is equipped with reflective strips?

A photo tachometer is specifically designed to measure the rotational speed of an object by using light to detect reflective strips or surfaces. In operation, the photo tachometer emits a beam of light, typically a laser or LED, towards the reflective strip that is attached to the rotating object. As the object spins, the reflective strip continuously reflects the light back to the tachometer. The device detects these reflections and counts the number of times the light is reflected over a certain period, which effectively translates into a measurement of the object's rotational speed.

This method is advantageous because it allows for non-contact measurement of speed, meaning that the tachometer does not need to physically touch the object it is measuring. This is particularly useful for high-speed applications or delicate components where contact could affect performance or cause damage. The accuracy and ease of use make photo tachometers a popular choice in various industries when precise speed readings are needed.