Mid-Frequency Pingers

Multi Frequency Pinger

JW Fishers acoustic pingers make relocating an underwater site or equipment quick and easy. The pinger is attached to a specific 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.

The MFP1 has user-selectable frequencies from 20 to 50 kHz in 500 Hz increments. The operator selects one of 60 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. Many MFP-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.

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 allows 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.

Optional larger housings (more batteries) are available, significantly extending the operating time. The Very Long Duration housing lets the pinger operate for years.

• Standard Operation Housing - 2.4” D x 9” L - 20 oz. Air/ -1oz. water
• Extended Operation Housing - 2.4” D x 14” L - 34 oz. Air/ -2oz. water
• Very Long Duration Housing - 4.5” D x 18” L - 8 lbs. air/ -1oz. water