Hydrophones MP-18


Piezoelectric Transducer

  • Small size, light weight
  • High output, high capacitance
  • Sensitivity change less than 1 dB with depth (to 200,500, or 1000 feet)
  • Acceleration cancelling balanced crystal configuration
  • Hydrocarbon resistant polyurethane case with optional aluminum cover
  • Ideal for geotechnical environmental studies

The MP-18 is a small, piezoelectric crystal transducer for use in shallow borehole studies and VSP applications. The MP-18 has high output and high capacitance, and negligible change of sensitivity with depth. Maximum working depths are from 200 to 1000 feet. Operating temperature is from 0 – 35 deg. C.

The MP-18 has an acceleration cancelling, balanced crystal configuration. The crystals are in a molded polyurethane case, with an optional protective aluminum cover.

Spec Sheet:

MP-18 Specifications

*Nominal Capacitance ± 20%
——17,000 Picofarads ——
Voltage Sensitivity ± 1.5 dB
42 Volts/Bar
14.5 Volts/Bar
Charge Sensitivity
714,000 pC/bar
210,250 pC/bar
Maximum Working Depth (Sensitivity change < 1 dB)
200 ft
1000 ft
Frequency Response ± 1 dB (into 22 Megohm load)
——8-1000 Hz ——
Operating Temperature Range
——0-35°C ——
2.03 in (5.16 cm)
2.00 in (5.08 cm)
0.21 in (0.53 cm)
6.05 cubic centimeters
.52 lbs (236 g)
Basic Unit
9.85 g
With Optional Cover:
16.62 g

 *measured on

Specifications are subject to change without notice.

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