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NAVIKNOT
Multisensor Speed Log Series
Hull Fittings, Sensors and Transducers
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NF Flush-Fitted Sensor with Sea Valve, Type 2829 for Steel Hulls, Single or Double Bottom |
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| Speed range |
-20 kn to +30 kn |
| Weight of hull fittings |
approx. 50 kg |
| Weight of sensor |
approx. 20 kg |
| Space required above floor for replacement of sensor |
1.1m |
| Length of cable between sensor & preamplifier |
30m |
| Sensor: |
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| Resistance to pressure |
IP 68 DIN EN 60529, submersible to 20m |
| Excitation voltage |
24V |
| Excitation current |
1A |
| Signal voltage |
0.18mV/knot |
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Sensor can be replaced without drydocking. |
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FNF III, Type 4874, for External Installation in Steel and Aluminum Hulls,
Single or Double Bottom |
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| Speed range |
-20 kn to +35 kn |
| Weight of hull fittings & sensor |
22 kg |
| Space required above floor for replacement of sensor |
none |
| Length of cable between sensor & preamplifier |
30m |
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| Sensor: |
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| Resistance to pressure |
IP 68 DIN EN 60529, submersible to 20m |
| Excitation voltage |
24V |
| Excitation current |
1A |
| Signal voltage |
0.18mV/knot |
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Sensor can be replaced without drydocking. |
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FNF I Yacht, Type 4040, 35 Knots for Steel and Aluminium Hulls, Single Bottom |
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| Speed range |
-20 kn to +35 kn |
| Weight of hull fittings & sensor |
approx. 17 kg |
| Space required above floor for replacement of sensor |
min 0.5m |
| Length of cable between sensor & preamplifier |
20m |
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| Sensor: |
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| Resistance to pressure |
IP 68 DIN EN 60529, submersible to 20m |
| Excitation voltage |
24V |
| Excitation current |
1A |
| Signal voltage |
0.18mV/knot |
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FNF II Yacht, Type 4120, 35 Knots for Wooden and Fiberglass Hulls, Single Bottom |
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| Speed range |
-20 kn to +35 kn |
| Weight of hull fittings & sensor |
approx. 15 kg |
| Space required above floor for replacement of sensor |
min 0.5m |
| Length of cable between sensor & preamplifier |
20m |
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| Sensor: |
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| Resistance to pressure |
IP 68 DIN EN 60529, submersible to 20m |
| Excitation voltage |
24V |
| Excitation current |
1A |
| Signal voltage |
0.18mV/knot |
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FNF I Yacht, Type 4726, 60 Knots for Steel & Aluminium Hulls, Single Bottom |
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| Speed range |
-20 kn to +60 kn |
| Weight of hull fittings |
approx. 17 kg |
| Weight of sensor |
approx. 20 kg |
| Space required above floor for replacement of sensor |
min 0.5m |
| Length of cable between sensor & preamplifier |
20m |
| Sensor: |
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| Resistance to pressure |
IP 68 DIN EN 60529, submersible to 20m |
| Excitation voltage |
24V |
| Excitation current |
1A |
| Signal voltage |
0.18mV/knot |
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Doppler Transducer in Gate Valve, Type 4983, for Steel & Aluminium Hulls, Single Bottom |
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| Speed range |
-50 kn to +50 kn |
| Weight of gate valve with transducer |
50 kg |
| Space required above floor for removal of sensor |
770 mm |
| Length of cable to preamplifier |
18 m or 40 m |
| Radiated power (electrical) |
10 W max |
| Ambient temperature, operation |
-2º to +40ºC |
| Protection grade |
IP 68 DIN EN 60529, submersible to 35 m |
| Signal mode |
pulse |
| Frequency |
2 MHz |
| Number of beams |
2 |
| Beam width |
1.5º |
| Beam angle |
1.5º from vertical |
| Min bottom clearance |
1.8 m |
Sensor can be replaced without drydocking. |
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Doppler Transducer in Tank Mount, Type 4978, for Steel Hulls, Single or Double Bottom |
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| Speed range |
-50 kn to +50 kn |
| Length of cable to preamplifier |
18 m or 40 m |
| Radiated power (electrical) |
10 W max |
| Ambient temperature, operation |
-2ºC to +40ºC |
| Protection grade |
IP 68 DIN EN 60529, submersible to 35 m |
| Signal mode |
pulse |
| Frequency |
2 MHz |
| Number of beams |
2 |
| Beam width |
1.5º |
| Beam angle |
1.5º from vertical |
| Min bottom clearance |
1.8 m |
Sensor can be replaced without drydocking. |
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