Low-Frequency Pingers

Multi 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 MLFP-1 has user-selectable frequencies from 11 to 16 kHz in 500 Hz increments. The operator selects one of 11 different frequencies before deploying the pinger. The acoustic pinger can be automatically activated when put in the water or manually activated with a jumper on the circuit board. Several MLFP-1 pingers can be deployed in the same general area, transmitting a different frequency. A diver using the pinger receiver can pinpoint the exact location of each pinger without interference from the others.

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• 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