M157 Trawl Monitor
Part NumberM157

The mid-size M157 features low-frequency, wide-beam elements for precise measurement of trawl-net openings and distance to the bottom. Connection to the trawl cable is easy with the included MacArtney SUBCONN® underwater connector.
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- Transducer is pressure rated to 600 m (2000')
- Easy-to-mount in flooded pod
- Stainless-steel, internal chassis
- SEALCAST™, seamless, urethane housing for long life underwater
Options
- Coupling transformer for interface to catch monitor
- Bulkhead connector on transducer
- No underwater connector
- Other frequencies and impedances
- Acoustic Window: UrethaneCable Type: C43, one shielded twisted pair (2-14 AWG) with braided shield, black neoprene jacket, 10 mm (13/32") diameterConventional Beam: 54° at -3dbCountry of Origin: USAHousing Depth Rating: 600 m (2000')Housing Type: SEALCAST™, seamless, urethane housingMounting Style: Net MountedNote: Cables sold separatelyRecommend Use: Trawl MonitoringSingle or Dual Frequency: SingleTransducer Functions: Trawl net openings and distance to bottomWeight: 0.8 kg (1.7 lb.)Frequency: 33 kHz or 38 kHzPower Rating: 350 WConventional or Chirp: ConventionalFOM (db): -23Impedance Series: 60-j0(Ω)Q: 8