Fox has revised the K9 pressure switches with the purpose to satisfy the latest customer demands. The switches are also available with M12 electric connection and with the execution according to the Directive ATEX class II 2G EEx-d. The principal characteristic of this series of pressure switches with exchange contacts and with a strong construction is to be able to regulate the operating point through the rotation of the anodized aluminium ring provided with the appropriate locking dowel. The executions with contact parts in INOX316 stainless steel complete the range for uses with aggressive fluids.