BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System
Studies of Dielectric Materials. BII
manufactures differential and single-ended charge amplifiers which
can provide test condition of zero electric field for measuring
properties of dielectrics such as pyroelectric, ferroelectric and
piezoelectric materials. BII’s charge amplifiers support direct
charge measurement from quasi-static to 1MHz frequency:
piezoelectric constants d31, d33 and dh, effects of
Thermal/Temperature, Pressure, Electrical Field such as thermal and
pressure depoling. BII-1101 has built-in high voltage protection for
high electric field characterization such as P/E or D/E Hysteresis
(Sawyer-Tower Circuit), dielectric constant and energy loss, and
their field-level and frequency dependences. (BII manufactures power
amplifiers and step-up transformers for low and high field
measurement). A stationary cable has little effect on the charges,
therefore a fixed long cable can be used in low frequency
measurement.
Signal Conditioning of Hydrophones, Sensors and Array:
BII’s charge amplifiers are for measuring the charges resulting from
sound pressure, force, acceleration. It sums the charges generated
by all elements in parallel electrically of an array to boost the
SNR (Signal to Noise Ratio). The shielded twisted pair cable can be
used with BII-1106 and differential piezoelectric elements to reduce
EMI over long cable.
Charge Amplifier | Datasheet | Measurement of pyroelectric, ferroelectric and piezoelectric materials. |
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