The best solution for applications that require dual set points! Each of the two glass-filled polycarbonate housings contains a sensing diaphragm and an integral snap-acting switch. One or two sample line connectors are located on either or both sides of the diaphragm to accept air sample connections. The snap action switch can be actuated by a pressure or vacuum air flow, or by a pressure or vacuum differential. Typically, DNS2™ switches are applied to two-stage furnaces where high fire and low fire set points are required.

• Narrow switching differential
• Low set point tolerance over a wide operating temperature and set point range 
• Factory-calibrated and sealed set points are available from 0.05′′ to 10.0′′ wc 
• Sense positive, negative or differential air pressure