Designed and manufactured by Sailes Marketing Ltd, Hunter Transducers are units which convert the mechanical movement of a speedo cable to an electronic signal. They are referred to by various names, such as: Pulse generators – Signal generators – Rotary transducers – Pulse sender. Their main purpose is to supply a speed/distance pulse signal for use with Navigation systems, Tachographs, Taximeters, Speed Limiters, Data Loggers and Speed Warning systems.