Tacho-generators were fitted to many older gas generators such as RR Avon and Olympus engines to measure shaft speed. These devices are three phase generators that produce a low-frequency low voltage output. This signal can be difficult to read using digital counter modules for the following reasons:
We produce a replacement device that utilises a phonic wheel and magnetic pick-up (MPU). This picks up the same drive as the existing tacho-gen, but the phonic wheel and MPU produces a higher frequency and amplitude AC output.