The Bristol series 5457-31G Pneumatic Flow/ Differential Liquid Level Controller is designed for performance and durability under rigorous operating conditions.  It provides cost-effective operation due to very low air consumption.   This electronic set point controller is explosion-proof (Class 1, Division 1) and can be adjusted by either discrete or analog inputs from remote locations via computer. The meter body is made of rugged, precision die-cast aluminum which makes it suitable for nearly all differential pressure applications. 

The 5457-31G is suitable where control with pressure override flow is required, such as gas transmission and gas distribution applications.