B45 Depth Through Hull Transducer Stem - Includes Fairing Block
B45 Depth Through Hull Transducer Stem - Includes Fairing Block

B45 Depth Through Hull Transducer Stem - Includes Fairing Block

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The B45 is the smallest and most economical, dual-frequency, bronze, stem transducer. Its streamlined shape deflects aerated water from the transducer's face for strong return echoes and clear display images. An Airmar High-Performance Fairing is recommended for all installations to get the best possible results.

Key Features:

  • Depth only transducer
  • Compatible hull material: wood and fiberglass
  • Cable 13.7m (45ft) cable with connector
  • Hole diameter for installation: 7/8"
  • Includes fairing block

Compatibility and Connectivity

  • ST40, i40, ST60+, i50 on the SeaTalk1 network
  • ST70, ST70+ and i70 on the SeaTalkng network


These transducers are compatible with:

  • ST40 Bidata
  • ST60+ Tridata
  • i40 Bidata
  • i50 Tridata

The transducer simply connects to the back of the instrument. The transducers above can also be used to connect to a Depth and Speed Instrument on the SeaTalk 1 network. For example:

  • ST40 Depth and ST40 Speed
  • i40 Depth and i40 Speed
  • ST60+ Depth and ST60+ Speed
  • i50 Depth and i50 Speed

In this case the depth cables from the transducer connect to the back of the Depth Display and the speed cables into the back of the Speed Display.


The transducers above are also compatible with ST70, ST70+ and i70 instrument displays on the SeaTalk ng network via a depth and speed pod or an iTC-5 (pods and iTC-5 sold separately).

The transducer is connected either to the Speed and Depth pods or the iTC-5 which converts the transducer signals to SeaTalk ng. The pods or iTC-5 is then connected to your SeaTalk ng backbone.

Pod or iTC-5?

Pods are available for depth, speed and wind and the transducer should only be connected to the associated pod (i.e. depth transducer to depth pod).

For recording both depth and speed/temp with the transducers above you will require a depth pod and a speed pod. The iTC-5 (image above right) can convert transducer signals for depth, speed/temp, wind, compass and rudder reference all in the one unit, eliminating the need for multiple pods.

After ordering online, you will receive an automated email confirmation containing your order details. Your order will then be confirmed within a few minutes of placing your order.

It is our policy to ensure we deliver to our customers in a timely manner. In order to achieve this we use a range of freight companies depending on the size and weight of your order. In some instances we may use a number of carriers to get your products to you. For example, chain may come by road, some electronic equipment by air.

Most orders are shipped within 2 - 5 Days

Shipping rates

Orders delivered to Australian Post Codes attract an $18.00 Flat Rate Shipping Charge* This excludes Bulky or Dangerous Goods

For Bulky Goods, Dangerous Goods and Remote areas.

If the cost to send is vastly different to our standard delivery costs, someone from our team will contact you prior to dispatch to arrange further payment or to issue a refund if you are not happy with the additional charges.

International orders will be charged at $0.00 initially and our staff will be in contact with a shipping quote. If the quote is not accepted the customer reserves the right to cancel their order and be refunded in full.

Should you have any queries or concerns about shipping, please don't hesitate to get in touch by clicking the support button on bottom right of the page.

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