The Models 765M20 and 765M22 High Intensity Acoustic Sensors (Microphones) 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 miniature 10-32 fused-glass coaxial connector, when combined with all-welded construction, provides a true hermetic seal.
Electrically, 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 when used with a true differential input amplifier. Consult the factory for customized versions of this sensor.
Notes:
With Connector Mated or Protected, Unit is Hermetically Sealed.
Charge Sensitivity | 2200 pC/psi +/-10% |
---|---|
Avg Temp Coeff of Sensitivity | 0.08% / Deg F Nominal |
Frequency Response | 2 Hz To 8,000 Hz |
Dynamic Range | 0.28 x 10-4 to 10 psi (191 dB SPL Max.) |
Transducer Capacitance | 11,000 pF +/-10% |
Insulation Resistance | 100 Megohms Min., 50 VDC Test |
Isolation Resistance | 100 Megohms Min., 50 VDC Test |
Dielectric Strength | 550 Vrms, 60 Hz, Element to Housing |