<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;"><b>Contact Tachometer</b></span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;">Contact tachometers necessitate direct interaction with a rotating object to gauge its revolutions per minute (RPM). These devices employ either an optical encoder or a magnetic sensor, with continuous contact with the shaft or rotating component being essential for precise readings.</span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;"><b>Non-Contact Tachometer</b></span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;">Non-contact tachometers operate without physically touching the object in question. Typically utilizing lasers or infrared light, they prove invaluable for measuring RPM in situations involving hazards, hard-to-reach areas, or mobile objects.</span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;"><b>Laser Tachometer</b></span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;">Laser tachometers integrate a laser at the device's end, directed towards the rotating object, to provide RPM readings through direct observation. Falling under the non-contact category, they excel in challenging environments like confined spaces or when working with industrial machinery. Laser tachometers offer varying detection distances, commonly ranging from 1 to 2 meters.</span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;"><b>Optical Tachometer</b></span></span></span></p>
<p class="western"><span style="color: #252525;"><span style="font-family: Times New Roman, serif;"><span style="font-size: medium;">Optical tachometers incorporate an optical sensor to ascertain the rotational speed of wheels, motors, or shafts. Utilizing lasers or beams of light, they measure RPM and can detect variations in the frequency of reflected light.</span></span></span></p>