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.
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|