Compact Instruments sells VLS speed sensors, optical speed sensors, analog output speed sensors, and more. Their mini VLS series laser optical speed sensor has an optical range of 100 to 2000mm, a speed range from 0.1 to 250,000 rpm, on target ind., IP67 rating, and an m20 threaded housing type, or a plain body with fixing slots. This sensor is made of stainless steel with an integral connector.

Process Automation offers digital speed sensors and belt speed sensors. Belt speed sensors include the PT-500 tachometer for non-driven pulley rotating range of 24 to 3000 RPM, PT-501LS for 1 to 50 RPM, and PT-501 for belt speeds of 24 to 3000RPM. Digital speed sensors provide 4-20mA proportional to conveyor speed, relay output for belt under and over speed, and Profibus DP interface.