Frank W. Murphy Direct Mount Temperature Swichgages® SDB500EX

• The SDB Series are direct-mounting Temperature Swichgage devices. • They provide an accurate direct-reading gauge with an adjustable limit switch to activate alarms and/or shutdown. • A knob on front of the Swichgage allows you to adjust the limit switch trip point. • Pointer movement is actuated by a bi-metallic sensing element. • When the indicating pointer on the SDB touches the adjustable contact, a one-wire-to-ground circuit is completed to shut down the equipment, and/or actuate audible or visual alarms. • When the temperature rises to the preset trip point, the pointer engages an internal SPDT snap-switch to close/open circuits. • The most common use of the SDB Series is to monitor gas compressor temperatures. • Engine exhaust temperature can also be monitored to indicate overloading or lean fuel mixtures; or use the SDB to help coordinate loads on twin-engine installations. SDB500EX • Enclosure is explosion-proof and CSA listed for Class I, Group C, and D hazardous locations.