Mid-Frequency Pingers
A quick and easy way to relocate an underwater site
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 acoustic pingers are available in the mid-frequency range (20 - 50kHz) which can transmit 2-3 thousand feet; or in the low-frequency range (11-16kHz) which can transmit 3-6 miles. Both mid and low frequency pingers are available as a single frequency pinger; or as a multifrequency pinger which allows the operator to select the desired transmit frequency in the field. Single frequency pingers can be ordered in select frequencies which is set at the factory.
With Fishers 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 length of each pulse and output power adjustments allow the operator to control the distance the pingers can be detected. These features make the pingers extremely versatile and the first choice for almost any relocation operation.
Mid-frequency pingers are available as a Single Frequency Pinger (SFP1) and as a Multifrequency Pinger (MFP1). The SFP1 is available in several frequencies, one of which is specified at time of order (22, 26, 30, or 37.5kHz) at no additional charge. 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, each transmitting a different frequency. A diver using the pinger receiver can pinpoint the exact location of each pinger without interference from the others.
SFP-1: $795
MFP-1: $995
Low-Frequency Pingers
A quick and easy way to relocate an underwater site
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 acoustic pingers are available in the mid-frequency range (20 - 50kHz) which can transmit 2-3 thousand feet; or in the low-frequency range (11-16kHz) which can transmit 3-6 miles. Both mid and low frequency pingers are available as a single frequency pinger; or as a multifrequency pinger which allows the operator to select the desired transmit frequency in the field. Single frequency pingers can be ordered in select frequencies which is set at the factory.
With Fishers 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 length of each pulse and output power adjustments allow the operator to control the distance the pingers can be detected. These features make the pingers extremely versatile and the first choice for almost any relocation operation.
Low-frequency pingers are available as a Single Low-Frequency Pinger (SLFP-1) and as a Multi Low-Frequency Pinger (MLFP-1). The SLFP-1 standard frequency is 12kHz. Additional frequencies are available and must be specified at time of order (11-16kHz in 1kHz steps) at an economical cost. The MFP1 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, each transmitting a different frequency. A diver using the pinger receiver can pinpoint the exact location of each pinger without interference from the others.
SLFP-1: $1,995
MLFP-1: $2,595
PR-1 Pinger Receiver
Quickly locate any pinger
The PR-1 is a highly advanced pinger receiver that will quickly locate any pinger transmitting a frequency between 3 KHz and 97KHz. The receiver can be carried by a diver or deployed from a boat using the optional Boat Deployment Kit.
The Operating the receiver is easy; select the frequency to be located and scan the area with a 360 degree sweep. When the diver points the receiver in the direction of the pinger, an audio alarm sounds through the underwater earphone and the LED light bar flashes. By reducing the sensitivity of the receiver the diver can obtain an exact direction to the pinger's location. As the diver swims in that direction a compass mounted on top of the receiver provides the precise heading. As the diver approaches the pinger, the audio tone gets louder and the receiver's light bar flashes more LEDs.
If several pingers are operating in the area, the diver can switch the receiver tuning and repeat the procedure. The frequency is quickly changed using a control on the front panel. The frequency setting is displayed on a large, easy to read LCD (illuminated digital readout) as a number between 3 and 97 on the control panel.
$4,995
ORDER NOW Read MoreMFT-1 Transponder
The quick and easy way to relocate an underwater site
JW Fishers acoustic sonar transponder makes it quick and easy to relocate an underwater site or piece of equipment. The sonar transponder is attached to an underwater location where it sits quietly listening for a coded signal from a acoustic sonar interrogator. When a diver, equipped with a sonar interrogator, points the interrogator in the direction of the transponder, the transponder sends out a coded return signal that is picked up by the acoustic sonar interrogator. The interrogator displays the distance to the transponder (in feet or meters), and a compass displays the heading to the transponder. The diver can follow the signal directly to the target. The acoustic sonar transponder can transmit any one of sixty (60) different frequencies (operator selectable), so many can be deployed in the same general area without interfering with each other. The diver sets the acoustic sonar interrogator to the frequency of the acoustic transponder and is guided directly to it. The MFT-1 multi frequency transponder has a range of over 3,000 feet.
The standard frequencies are: 20kHz to 50kHz in 500Hz steps (special frequencies are also available). The MFT-1 can be automatically activated when put in the water or manually activated with a switch before deployment. Many MFT-1 can be deployed in the same general area, each transmitting a different frequency. A diver using the DHI-1 diver held interrogator can pinpoint the exact location of each MFT-1 transponder.
$1,395
ORDER NOW Read MoreDHI-1 Diver Held Interrogator
Quickly locate acoustic sonar transponders
The DHI-1 Diver Held Interrogator will quickly locate a acoustic sonar transponder transmitting a frequency of 24, 25, 27, 28, 29, 30, 31, 32, or 33kHz (special frequencies are also available). The DHI-1 acoustic sonar interrogator can be carried by a diver or deployed from a boat using the optional Boat Deployment Kit.
Operating the DHI-1 is easy; select the transponder frequency to be located and scan the area with a 360 degree sweep. When the diver points the DHI-1 in the direction of the transponder, an audio alarm sounds through the underwater earphone and the LED light bar flashes. The DHI-1 displays the distance to the transponder and a compass mounted on top of the DHI-1 provides the diver with the precise heading to the target. The DHI-1 acoustic sonar interrogator calculates the distance to the transponder by measuring the time between the transmit signal and the return signal. As the diver moves in the direction of the target the distance (in feet or meters) is constantly updated to give the precise distance.
If several transponders are operating in the area, the diver can switch the DHI-1 frequency to match the next acoustic transponder and repeat the procedure to the next target.
The DHI-1 can detect and give range and bearing on acoustic transponders at a distance in excess of 3,000 feet, and is compatible with most other manufactories transponders.
$5,995
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