WL-039 WELLHISE TL-900 is a non-contact tachometer and rev counter. This instrument is designed to measure the speed or number of revolutions of a rotating object without contact. It is widely used to measure the speed of motors, machines, propellers and other rotating equipment. It attracts attention with its user-friendly interface and precise measurements. With its wide measuring range, this instrument is a reliable solution for industrial use and is ideal for monitoring or maintaining the performance of rotating equipment.