Patent ID: 7308829

Claim:
A method of configuring a differential pressure indicator to provide either open circuit logic or closed circuit logic, comprising: providing a housing having first and second communication ports and an internal chamber, the housing having first and second electrical contacts in spaced apart relation; selecting between a first insulating arrangement wherein the first electrical contact is electrically insulated from a third electrical contact, and a second insulating arrangement wherein the second electrical contact is electrically insulated from the third electrical contact to provide for one of closed circuit logic and open circuit logic; providing a pressure responsive element according to the selected one of the first and second insulating arrangements, the pressure responsive element receivable in the internal chamber to divide the internal chamber into first and second pressure chambers, the pressure responsive element including the third electrical contact, the third electrical contact in electrical communication with an electrical terminal insulated from the housing; and assembling the housing and the pressure responsive element according to the selected one of the first and second insulating arrangements.