xSonic Airmar B258

The B258 is a bronze, 1kW RMS, thru-hull, 50/200 kHz depth and temperature sensor. Ideal for use with our BSM-1 echosounder for fishing in shallow, medium and deep waters.

Key Features

High Performance

  • The 1kW transducer is perfect for fast, sportfishing vessels that can install a thru-hull transducer with a fairing.

Deep Water Fishing

  • Excellent for deep water bottom and structure fishing up to 500m/1640ft.


  • Calculate depth and temperature from one compact sensor.

Easy To Install

Wide Operating Range

  • From 1 knot to 45 knots.

Highly Accurate Sounding

  • Provides extremely accurate echosounding data, even at speeds of over 30 knots.

Dual Frequency

  • Works at 50 kHz and 200 kHz for good target detail in shallow water and excellent bottom tracking in deep water.


  • Built to withstand the environment.


Dimensions W x H x D 108 x 178 x 203 mm (W, L, H) (4.3 x 7 x 8″)
Weight 3.6 kg (7.9 lb)
Max Depth 640m (2100 ft) depending on sonar
Frequencies 50/200 kHz
Sonar and Transducers