Introduction

The NASA EML-3 PULSE is an innovative electromagnetic log transducer that accurately measures speed through the water with no moving parts. This unique design avoids problems often associated with conventional paddlewheel transducers, such as blockages caused by flotsam or fouling.

Technical features

• Speed measurement range: 0.2 - 40 knots


• Speed resolution: 0.1 knots


• Pulse rate: 15,000 - 25.000 pulses per nautical mile


• Nominal voltage: 12V DC


• Current consumption: 80mA


• Material: Glass fibre reinforced plastic


• Installation diameter encoder flange: 51mm


• Transducer connection cable: Length 5m

How it works

The EML-3 transducer generates an alternating magnetic field under the boat, which generates an electric field due to the movement of the boat in the water. The interface included in the scope of delivery converts this sensor signal into boat speed, trip and total distance. The data output provides pulses that correspond to those of a conventional log transducer.

Compatibility

The EML-3 transducer was specially developed for use with the NASA MARINE CLIPPER (also DUET), TARGET2 and CRUISER series logs. Please note that the transducer is only suitable for mounting in the outer skin of GRP hulls. Hulls made of steel or aluminium can affect the electromagnetic field of the transducer, while wooden hulls are not recommended due to swelling of the material.

Important notes

The EML-3 transducer is not compatible with existing NASA MARINE speed measurement systems and cannot be used as a replacement for defective conventional NASA log transducers.