Patent ID: 9342969
Filing Date: 2016-05-17
CPC Classification: G01L,G08B

Claim Text:
1. A pneumatic detector assembly comprising: a housing; a sensor tube; a contact pin; and at least one switch having a bellows operatively associated with the sensor tube and the contact pin, wherein the bellows is configured to move into and out of contact with the contact pin based on a pressure in the sensor tube; wherein the contact pin comprises a first contact pin and a second contact pin, and the at least one switch comprises: an alarm switch having a first bellows configured to be out of contact with the first contact pin in a normal operating condition and to be in contact with the first contact pin in an alarm condition; and an integrity switch having a second bellows configured to be in contact with a second contact pin in a normal operating condition and to be out of contact with the second contact pin in a fault condition.