A Vibration and temperature Overload Control System for rock crushing equipment. This very successful product was designed by our engineers to Metso New Zealand Ltd specifications, and is manufactured by us, then fitted as standard to Barmac VSI crushers. The Barmac is a NZ development, and this brandname is recognised worldwide as the premium VSI crusher. Exports of the Barmac and its after-sales equipment make up a large portion of NZ's heavy machinery tonnage. The VOCS keeps the Barmac in a safe condition, yet allows up to 20% more output. We have been working with Metso New Zealand (part of a multinational company) for over twelve years, and are considered a key supplier.