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Airmar CS4500-P17-SIM Ultrasonic Speed Sensor P17 Plastic Housing for Simrad, Ockham

Your Price: $887.50

3 In Stock!

SKU: CS4500-P17-SIM

Manufacturer: Airmar

Mfg. Part No: CS4500-P17-SIM (Kit)

Qualifies for Ground Promos Only - Call for Other Shipping Methods

Airmar CS4500-P17-SIM Ultrasonic Speed Sensor P17 Plastic Housing for Simrad, Ockham

Designed for use with all types and sizes of sailboats and powerboats, Airmar's revolutionary CS4500 makes cutting-edge speed sensing affordable. Instead of a paddlewheel, it uses two transducers mounted in one compact housing to detect particles in the water and calculates speed based on their distance apart. The CS4500 reacts instantaneously to changes in boat speed and is one of the most reliable and accurate speed sensors on the market.

Innovation at its finest! If one consistently demands the best, Airmar’s CS4500 Ultrasonic Speed Sensor delivers. Ultra-accuracy is foremost! With no moving parts, the ultrasonic sensor is capable of speed reading accuracy as low as 0.1 knots (0.1 MPH). By eliminating the traditional paddlewheel, there is no fouling, and drag is reduced to a minimum. Unlike paddlewheels, the CS4500 is engineered to measure water speed below the turbulent boundary layer of the hull, resulting in accurate clean-water readings.

The innovation doesn’t stop here. Ultrasonic sensing is a proven technology that has been used on ships for nearly 20 years. Building on this technology, Airmar developed an advanced design which operates at a higher-frequency, enabling reliable operation in both salt and fresh water. The state-of-the-art processor in the CS4500 calculates speed every half second, so it can respond to rapid changes in vessel speed. This translates into the most reliable and accurate ultrasonic speed sensor on the market—at a very competitive price.

Includes CS4500 Interface Junction Box for connecting power, transducer and boat electronics.


  • Speed and Temperature
  • Frequency: 4.5 MHz
  • Speed Range: 0.1 to 40 knots (0.1 to 46 MPH)
  • Operating Temperature Range: 0°C to 40°C (32°F to 104°F)
  • Unparalleled accuracy as low as 0.1 knots (0.1 MPH)
  • Designed for use with all types and sizes of sailboats and powerboats
  • No moving parts
  • Makes retrofitting a breeze—the retractable insert fits most Airmar 51 mm (2”) housings
  • Low-profile, plastic, bronze or stainless housings available
  • Built-in temperature sensor
  • Optional Data Converter changes analog signal to NMEA 0183 data stream (Part Number: NMEA-BOX)


Additional Images:

CS4500 Install

CS4500 Sail

How the CS4500 Works
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