Joslyn Clark Controls, offers a complete line of Diesel and Electric Fire Pump Controllers. Life safety and fire protection for buildings and building content is our primary design consideration. These controllers meet or exceed all requirements of the National Fire Protection Association, Standard NFPA 20, are listed by the Underwriters Laboratories, Inc., and are approved by the Factory Mutual System. Our controllers combine solid state and relay logic to provide the most sophisticated and reliable control circuitry available for a variety of applications.