JW Fishers acoustic pingers make it quick and easy to relocate an underwater site or piece of equipment.  The pinger is attached to an underwater location where it 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. 

Fishers family of commercial grade pingers include both the Single Frequency Pinger (SFP1) and the Multifrequency Pinger (MFP1). The SFP1 is available in several frequencies one of which is specified at time of order (22, 32, 40, or 50kHz). 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 pinger can be automatically activated when put in the water or manually activated with a switch.  Many MFP-1 pingers can be deployed in the same general area, each transmitting a different frequency.  A diver using the pinger receiver can pinpoint the exact location of each pinger without interference from the others.

With Fishers pingers the operator can select the number of pulses per second, the length of each pulse, and the output power. The length of each pulse and output power adjustments allow the operator to control the distance the pingers can be detected. With the MFP1 the transmission frequency can be selected by the operator before deployment. These features make the SFP1 and the MFP1 extremely versatile and the first choice for almost any relocation operation. 

Power for the pingers is supplied by two standard alkaline 9 volt batteries which last from a few days to many months, depending on output power and pulse selection. For long durations lithium batteries can be used. Longer housings are also available which greatly increase the operating time.  The Extended Operation Housing holds six batteries to give 3 times the normal operating time. The Very Long Duration Housing holds twelve "D" size batteries and gives 12 times the normal operating time.

All Fishers pingers are covered by a full TWO YEAR WARRANTY. 

Download Pinger Data Sheet

• Custom frequencies (other than 22, 32, 40, or 50 KHz) are available for SFP-1: $95.
• Carrying case (holds four pingers or two pingers and a pinger receiver): $250.
• Extended Housing (3 times normal operating time): $195.
• Very Long Duration Housing (12 times normal operating time): $785.

Descriptions and pictures of options