Speed Sensors
ST300
ST850
CS4500
Shorty™ Sensor, Thru-Hull
Low-Profile, Thru-Hull
Ultrasonic, Thru-Hull
• Analog output
• Speed and Temperature
• Speed Range: 2 to 45 knots (2 to 52 MPH)
• Self-closing valve
• Thru-Hull, Low-Profile, Plastic Housing
• 10 m (33’) cable length
• Supply Voltage: 5 VDC to 25 VDC
• Supply Current: 100 mA at 12 VDC
• Hole Diameter: 51 mm (2”)
• Analog output
• Speed and Temperature
• Speed Range: 2 to 45 knots (2 to 52 MPH)
• Self-closing valve
• Thru-Hull, Low-Profile, Plastic, Bronze, or Stainless Steel Housings
• 9 m (30’) cable length
• Supply Voltage: 5 VDC to 25 VDC
• Supply Current: 100 mA at 12 VDC
• Hole Diameter: 51 mm (2”)
• Analog or NMEA 0183 output
• Speed and Temperature
• Speed Range: 0.1 to 40 knots (0.1 to 46 MPH)
• Thru-Hull, Low-Profile, Plastic or Bronze Housings
• 10 m (33’) cable length
• Frequency: 4.5 MHz
• Temperature Range: 0°C to 40°C (32°F to 104°F)
• Supply Voltage: 10 VDC to 15 VDC
• Supply Current: 155 mA at 12 VDC
• Hole Diameter: 51 mm (2”)
Speed Sensors
Speed Sensors
• Designed for use with all types and sizes of sailboats and powerboats
• Flush-mount and
beveled-edge housings available
• Self-closing valve eliminates flow of water into the hull when paddlewheel insert is removed
• Analog Output Wiring:
—Red: Positive Voltage
—Bare: Ground
—Green: Signal
—White: Temp
—Brown: Temp
• Hull Deadrise Angle: 0° to 7°
www.airmar.com
ST300
ST850
SPECIFICATIONS
SPECIFICATIONS
Speed Range
Supply Voltage
5 VDC to 25 VDC
Supply Current
100 mA at 12 VDC
Hole Diameter
51 mm (2”)
Pulse Rate
17,000 p/nm* (4.8 Hz per knot)
Speed Range
Supply Voltage
5 VDC to 25 VDC
Supply Voltage
10 VDC to 15 VDC
Supply Current
100 mA at 12 VDC
Supply Current
155 mA at 12 VDC
Hole Diameter
51 mm (2”)
Hole Diameter
51 mm (2”)
Pulse Rate
17,000 p/nm* (4.8 Hz per knot)
Pulse Rate
20,000 p/nm* (5.6 Hz per knot)
*p/nm = pulses per nautical mile
P17 Plastic
75 mm (2.96”)
2-12”
threads
14 mm
(0.57”)
ø 51 mm
(2.00”)
ø 75 mm (2.94”)
30 mm
(1.19”)
2-12”
threads
ø 51 mm
(2.00”)
5 mm (0.20”)
2-12”
threads
Plastic
ø 51 mm
(2.00”)
ø 75 mm (2.94”) 5 mm
(0.20”)
ø 75 mm (2.94”)
5 mm (0.20”)
22 mm
(0.88”)
2-12”
threads
Bronze
30 mm
(1.19”)
Bronze
ø 51 mm
(2.00”)
P120 Plastic and
B120 Bronze
41 mm
(1.60”)
89 mm (3.49”)
75 mm (2.94”)
5 mm
(0.20”)
P17 Plastic and
B17 Bronze
ø 78 mm (3.08”)
B17 Bronze and
SS577 Stainless Steel
ø 78 mm (3.08”)
ø 78 mm (3.08”)
2-21”
threads
0.1 to 40 knots
(0.1 to 46 MPH)
*p/nm = pulses per nautical mile
89 mm (3.49”)
*p/nm = pulses per nautical mile
SPECIFICATIONS
2 to 45 knots
(2 to 52 MPH)
Plastic
ø 51 mm
(2.00”)
ø 75 mm (2.94”)
94 mm (3.69”)
2 to 45 knots
(2 to 52 MPH)
94 mm (3.69”)
Speed Range
CS4500
5 mm
(0.20”)
Also available in P314/B21 and
P217/B119 housings
©Airmar® Technology Corporation
Speed_Sensors_PC_rG 02/03/10
As Airmar constantly improves its products, all specifications are subject to change without
notice. All Airmar products are designed to provide high levels of accuracy and reliability,
however they should only be used as aids to navigation and not as a replacement for
traditional navigation aids and techniques. Shorty™ is a trademark of Airmar Technology
Corporation. Other company or product names mentioned in this document may be
trademarks or registered trademarks of their respective companies, which are not affiliated
with Airmar.