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Acoustic pressure sensor
1200 ±200 pC/psi | 765M25 / 765M27 Columbia Research Laboratories

The Models 765M25 and 765M27 High Intensity Acoustic Sensors (Microphes) are designed for the measurement of gas-borne sound in industrial applications. These sensors have been constructed for use in corrosive environments that are compatible with the type 316 stainless steel diaphragm. The two designs differ only in their electrical connections. The Model 765M25 incorporates a miniature 10-32 fused-glass coaxial connector, and Model 765M27 provides a 2-pin connector interface. When combined with their all-welded construction, both units provide a true hermetic seal.

Electronically, these devices comprise sensing elements of piezoceramic material in a balanced and floating configuration to provide enhanced rejection of electrical noise associated with many industrial environments. Optimum performance is achieved whwn used with a true differential input amplifier.
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