The DK140 is a Non-TSO version of the underwater acoustic locating beacons.

For TSO ULB products, please see the DK120/90 information page.

Beacon Specifications

Operating Frequency:	37.5 kHz ± 1 kHz
Operating Depth:	Surface to 20,000 feet (6096 meters)
Pulse Length:	9 milliseconds minimum
Pulse Repetition Rate:	0.9 pulse/second minimum
Useful Life:	6 years
Operating Life:	30 days (minimum)
Acoustic Output, Initial:	1060 dynes/cm2rms pressure at 1 meter (160.5dB)
Acoustic Output, After 30 Days:	700 dynes/cm2rms pressure at 1 meter (157.0 dB)
Operating Temperature:	+28°F to +100°F (‐2.2°C to +37.8°C)
Actuation:	Fresh or salt water
Radiation Pattern:	Rated output over 80 percent of sphere
Size:	1.30" diameter x 2.97" long (3.30 cm diameter 7.54 cm long)
Weight:	Less than 4.9 oz (139 grams) (including battery)
Material:	7075‐T6 Aluminum, chromate (clear) finish
Power Source:	Lithium Battery, single cell. Factory or user replaceable.
Storage Temperature:	‐67°F to +160°F (‐55°C to +71°C)