All our meters are designed and assembled in the U.S.A
The EPA recommends prudent avoidance of EMFs - Make sure your home is safe!


DSP-523 Gaussmeter: Ignore/Bandpass/Analyze Powerlines

3-Axis EMF meter can IGNORE, BANDPASS and ANALYZE 50/60Hz powerline fields



   The DSP-523 uses a powerful digital signal processor that sets a new standard for AC gaussmeters.  Now you can ignore powerlines, bandpass powerlines and analyze powerline harmonics, all with one simple meter.

   The first line shows you the total, unfiltered field strength.  The second line shows the field strength with one of four digital filters selected:

  • Ignore 60Hz + Harmonics
  • Ignore 60Hz Only
  • Bandpass 60Hz + Harmonics
  • Bandpass 60Hz Only

   Selectable axis, graphing, max hold, and a variable backlight are just icing on the cake.

  No other gaussmeter has the ability to accurately notch or bandpass powerline fields and harmonics while still passing other frequencies.  Easy to use, and innovative.

 50 Hz European Fields

Need to use the meter in Europe where power line are 50Hz instead of 60Hz?  No problem, you can switch between 50Hz and 60Hz filtering in the menu.  Simple.



  • Make sure your home's EMF levels are safe
  • Powerline Field Measurements
  • Powerline Quality and Total Harmonic Distortion (THD) analysis
  • Measurement of DC or combustion motor electromagnetic fields
  • Measure hybrid car electromagnetic radiation
  • Appliance Measurements
  • Lab Testing & Calibration
  • Testing notch/noise filters

Ignore Powerlines

Completely Ignore Powerlines

   Let's say you want to measure the fields generated by a combustion or DC motor such as the fields inside your car.  These fields aren't at powerline frequencies, but in the electrically dense environment we live in today, a regular gaussmeter's readings will be distorted by surrounding powerline fields.  How would you measure the 80Hz refresh rate from an LCD monitor?  What about paranormal research, where you're looking for EMF anomalies but want to be sure you're not measuring man-made fields?  What if you could ignore 60Hz and harmonics of 60Hz, to only measure fields NOT related to powerlines?  Now you can.


60Hz+Harmonics Notched Frequency Response-PWR Response

Ignores Power Lines

   The picture to the right shows the meter measuring the fields from a transformer, which are at powerline frequencies.  The meter shows a total field strength of 186.8 mG, but the meter ignores it for the second reading, showing just 0.7 mG from other sources:

Ignoring 60Hz Only

   What if you want to measure the field strength of the power line harmonics, or accurately measure a field that is close to a harmonic of 60Hz (190Hz for example)?  The DSP-523 allows you to do this as well, by only ignoring 60Hz, but measuring everything else.

 60Hz Only Notched Frequency Response

-60Hz Response


Bandpass Powerlines

Bandpass Powerlines

   Take measurements with a narrow bandpass filter centered at 60Hz, allowing you to accurately measure powerlines without distortion from harmonics.  Or, bandpass on 60Hz + Harmonics, which tells you the total field strength due to powerlines, including all harmonics.

60Hz+Harmonics Bandpass Frequency Response@PWR Response

Measuring Power Line Magnetic Fields without Harmonics

   Sometimes you want to see how “clean” the 60Hz sine wave from an AC powered device is. When a sine wave is pure or “clean”, it will only contain the fundamental frequency (60Hz Only), but when a sine wave is “dirty” from power glitches or other faults, it will contain harmonics of the fundamental frequency (120Hz, 180Hz, etc).  Take measurements with a very narrow bandpass filter at 60Hz, and compare that to the overall unfiltered field strength.  For a clean sine wave, these measurements will be almost the same.

60Hz Only Bandpass Frequency Response
@60Hz Response



  • Accuracy: ±(4% + 4 digits) from 48 to 62 Hertz
  • Flat frequency response:
    • ±½dB 30 to 300 Hz
    • -3dB 15 to 330 Hz
  • Range 0-250 mG (auto-ranging)
  • Highest resolution: 0.01 mG
  • True RMS Measurements
  • Three Axis Detector, selectable (3-Axis, X, Y, Z)
  • Two display styles:
    • On-Screen Graphing of total RMS, Notched and Bandpassed field strength
    • Dual readout: Compare total RMS strength plus select:
      IGNORE 60Hz Only or 60Hz+Harmonics
      BANDPASS 60Hz Only or 60Hz+Harmonics
  • Blue LED Backlight, variable brightness
  • Max Hold on ALL features
  • Update Rate: 1.6 times per second
  • Selectable units: milliGauss or microTesla
  • Runs on one 9V Alkaline battery (included)
  • External power jack to run unit with optional AC power adapter
  • Unit Weight (without battery): 7.2 oz
  • Unit Dimensions: 5.5" x 3.6" x 1.75"
  • 2 Year Warranty
  • Made in the USA


Product Reviews

 "The ability to filter 50/60Hz contamination makes the DSP-523 the only truly useful device for investigation and research"  - Stephen Z.

   The DSP-523 has really set a new standard for EMF meters.  It is full-featured, sensitive, easy to operate and overall a sturdy and high-quality device.  In my opinion, the ability to filter 50/60Hz contamination makes the DSP-523 the only truly useful device for investigation and research.

    The controls and interface were also very well designed.  When I first read the documentation I must admit I was a bit intimidated by the myriad of features available on the DSP-523.  However, after using the device for a few minutes I had no trouble understanding the interface and navigating the menus.  That sort of usability for a full-featured device is not trivial to design. - Stephen Z.

"Compared to the DSP-523, the KII meters had no value in the field"  - Michael J.

   I had a chance to use the DSP-523 yesterday on location concurrently with two KII and one Cell Sensor EMF Meters. We also had 3 single axis arrays placed in the area.  Throughout the evening we received several 2-3mg spikes on one of the KII's, one spike on the second KII and one 3mG hit on an array.  We were in a location with no man-made immediate power sources or exterior lighting as it was outdoors with power lines approximately 50 yards away from our central area. Throughout the evening we were also able to clearly see a pattern of stable EMF in the local area measuring .03 - .50 mg on the DSP-523 as well as see the powerline contamination which routinely stayed constant at .10 to frequent 3.90x spikes. Being able to isolate and watch the power line EMF in the field was immediate confirmation of the false positive occasional spikes on the KIIs. The LED was incredibly easy to read throughout the evening as well. There was only one inconsistent reading received the entire evening, which was recorded on the DSP-523 of 4.92 and never replicated and was outside the normal recorded range for the power lines. In my opinion, compared to the DSP-523, the KII meters had no value in the field next to the DSP-523's accuracy and ability to filter power line noise! Even in 33 degree weather, the meter was stable, easy to read with no temperature related issues as well! While 2 of 3 arrays failed prematurely due to battery loss directly related to conditions.  - Michael J.

Send your product reviews to This e-mail address is being protected from spambots. You need JavaScript enabled to view it


Hard Carrying Case

Hard Carrying Case

Fits up two meters comfortably, this hard case will keep your equipment protected.  Case dimensions are 10.69" x 9.52" x 3.36" and features pluck-foam so you can customize it to hold any of your equipment!

Select the "With Hard Case" option below when ordering.

9v AC Adapter

9v AC Adapter

9v Adapter allows you to power your meter from a standard (USA) power outlet, saving on battery costs.

Select the "With AC Adapter" option below when ordering.


 Download Instruction Manual (pdf format)

$ 309.00
Hard Carrying Case:
No Hard Case Included
With a Hard Case ($18)
AC Adapter (USA Outlet):
No AC Adapter
With AC Adapter ($11.50)