Low-Frequency Pingers

Single Low-Frequency Pinger

JW Fishers acoustic pingers make relocating an underwater site or equipment quick and easy. The pinger is attached to an underwater location and continuously transmits a sonar signal. A diver equipped with a pinger receiver can detect the acoustic signal and follow it directly to the pinger. Pingers are available with different transmit frequencies, so several can be deployed in the same general area without interfering with each other. The diver sets the pinger receiver to the desired frequency and is guided directly to the pinger.

With Fisher's pingers, the operator can select the number of pulses per second, the length of each pulse, the output power, and, with some units, Delayed Start (from a minute to 365 days). The size of each pulse and output power adjustments allow the operator to control the distance the pingers can be detected. These features make the pingers versatile and the first choice for almost any relocation operation.

Low-frequency pingers are available as a Single Low-Frequency Pinger (SLFP-1) and Multi Low-Frequency Pinger (MLFP-1). The SLFP-1 standard frequency is 12kHz. Additional frequencies are available and must be specified at the time of order (11-16kHz in 500 Hz steps) at an economical cost.

Twelve standard alkaline 9-volt batteries supply power for the low-frequency pingers, which last from a few days to many months, depending on frequency, output power, and pulse selection. Lithium batteries can be used for longer durations. An extended Operating Life housing is also available, significantly increasing the operating time. The Extended Operating Life housing holds twenty "D" batteries, seven times the standard operating time.

• Standard Operation Housing - 4.75” D x 14.5” L - 7 lbs. air/-4 oz. water
• Extended Operation Housing - 4.75” D x 22” L - 14 lbs. air/-2.5 lbs. water

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