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Appendix: Frequencies Used by Other Manufacturers
Frequencies Used by Other Manufacturers
Company
Named Frequencies
Exact Measured Frequency
3M Dynatel
577 Hz
577 Hz
8 kHz
8,192 Hz
33 kHz
32,768 Hz
200 kHz
200,000 Hz
Fisher Labs
820 Hz
821 Hz
8.2 kHz
8,217 Hz
82 kHz
82,488 Hz
Goldak
117.5 kHz
117,500 Hz
Health Consultants Incorporated
8.1 kHz
8,128 Hz
81 kHz
81,326 Hz
480 kHz
480,323 Hz
McLaughlin
9.5 kHz
9,499 Hz
38 kHz
37,997 Hz
Metrotech
982 Hz
982 Hz
9.8 kHz
9,820 Hz
82 kHz
82,488 Hz
83 kHz
83,080 Hz
PipeHorn
480 kHz
479,956 Hz
512 Hz
512 Hz
8 kHz
8,192 Hz
Radio Detection
33 kHz
32,768 Hz
65 kHz
65,538 Hz
82 kHz
81,865 Hz
200 kHz
200,000 Hz
Rycom Instruments
815 Hz
815 Hz
82 kHz
82,318 Hz
Schonstedt Instrument Company
575 Hz
575 Hz
SubSurface
8 kHz
8,055 Hz
27 kHz
26,721 Hz
Subsite Electronics Ditch Witch
1 kHz
1,170 Hz
8 kHz
8,009 Hz
29 kHz
29,430 Hz
30 kHz (150 R/T)
30,303 Hz
80 kHz
80,429 Hz
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