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High intensity piezo-electric microphone

High intensity piezo-electric microphone - 8348 M/02/FM/02/FAM/02/TM/02/TA

5nC/bar nom. • vibration compensated (/*A) 250/300°C max. temp.

H

alf size version of the M/01, doublingacoustic bandwidth, but at expense of 14dBreduction in sensitivity, thus 0.01pC noise equivalent acoustic signal threshold increases to 82dB (2.5mbar)M/02 application areas include air blastmeasurement, combustion gas acoustic measurement, fluid flow dynamics. Signals may be superimposed upon high static pressure backgrounds. Transducers are calibrated at ambient pressure.

M/02/F M/02/T 18.5 18.3 28.6 A/F34.8 dims. mm dims. mm

39

3.923.016.0 3 x 4.8 ø holeson a 1" P.C.D.1/2" BSP 7.533.521.0 STABILITY

Piezo-ceramics are subject to a logarithmic sensitivity decay vs. time. Exposure of piezo- ceramics to initial high pressure, temperature produces an initial sensitivity loss. Thereafter, subject to these initial conditions not being subsequently exceeded, stability is exceedingly high, of the order 1 or 2%/1st yr.Transducers subject to high pressure/temperature should be thermally and load cycled to inbuild minimal long term degradation.

M/02/FA M/02/TA 18.5 18.3 34.828.6 A/F 1/2" BSP 28.836.34.4 3 x 4.8 ø holeson a 1" P.C.D. ENVIRONMENTAL

Both M/02s and M/01s have a variety of signal outlet options to cater for more extreme operating conditions. These encompass fluid immersion of transducer and cable, environments hazardous to cabling where cable armouring may be necessary and electrical interference.

10.342.026.6 PRESSURE/CHARGE/CONVERSION MODED33 COMPRESSION

options

Pt. NoM/02/F,T M/02/FA,TA >charge vs. pressure up to 500bar >wideband temperature calibration-50/+300°C >proof pressure test of transducers,transducer/cable assemblies to 150bar Pressure sensitivity nC/bar @ 20°C4/6 Vibration sens. pC/g @ 20°C23 max2.5 max Capacitance nF1.4/1.92.8/5.0 Resonant frequency kHz9070 Temperature range °C-50 /+250Press./ Vib. -5 % @ -50°C >hermetic Microdot, TNC and 7/16 UNS sensitivity deviation re 20°C+15% @ +250°C 2 pole connectors >integral hardline cable termination >case isolated signal for cmr Max static Wkg. pressure, bar200 Case materials/steel 303 S31 Weight gm46 (F), 70 (T)56.5 (FA), 77 (TA) ConnectorMicrodot skt. 10/32 UNF thd. Case sealwelded, hermetic diaphragm