The Series DH3 differential pressure controller provides a 4-20 mA process output, two SPDT relays with adjustable deadbands, and a large, bright backlit LCD display. The DH3 offers simplified programming via a menu key that enables the user to select: security level; set point or set point and alarm operation; auto or manual alarm reset; English or metric engineering units; pressure, velocity or flow operation, K-factor for use with various Pitot tubes and flow sensors, circular or rectangular duct size for volumetric flow operation plus many more. The robust Photohelic gage style a l u m i n u m housing is rated NEMA 4X on the front face when properly installed in a control panel. The sensing element can detect low differential pressures down to 0.25 inches up to 100 inches. Bidirectional ranges are also available. These features make the DH3 Digihelic Differential Pressure Controller the ideal instrument for monitoring pressures in various rooms, zones and ducts in factories, laboratories or buildings.
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