Why the Ace 200 Metal Detector Reads Aluminum as a Nickel Signal

What does frequency hateful when metal detecting?

A common definition of frequency is as follows: The number of waves per unit of time measured in Khz or kilohertz.  In a metal detector this is the number of electronic waves sent into the ground to detect metal.

Case: 10 Khz means your detector will send and receive 10 000 times per 2nd.

Why is Frequency important?

• Both Pulse induction and beat frequency oscillator type metal detectors use frequency of electronic fields or pulses sent into the ground.
• Different frequencies have different advantages and disadvantages when metal detecting.
• Metal detector frequencies range betwixt 3 – 100 Khz equally a general dominion.

Low Frequency.

• Have longer wavelength.
• Gets greater depth as long waves penetrate the footing more easily.
• Amend for detecting high electrical conductivity targets like argent.
• Not good for finding smaller targets.
• Not good for low conductivity targets like gold or Iron.

High Frequency.

• Take shorter wavelengths.
• Great for detecting small objects like tiny gilt nuggets.
• Better for low conductivity targets like gold and Atomic number 26.
• Less depth is achieved than low frequency.
• Higher accuracy, closer to the surface.
• More sensitive to ground mineralisation interference.

Most hobby detectors use a heart ground to try and get the best of both frequencies in the Goldilocks zone around six – 8 Khz for the best depth and sensitivity trade off. Some detectors even let yous manually set the frequency on your detector.  Others even apply multiple frequencies at one fourth dimension.

2 types of Frequencies:

Single Frequency operation:   Also called continuous wave has only i frequency selection. This is ordinarily institute in the Trounce Frequency Oscilators like the Garrett Ace 250. This type is most oft found in Entry level machines.

Multiple or Dual Frequency operation: Some more advanced metal detectors brand use of more than than i frequency at the same time. Examples of this can be found in the Minelab Excalibur Ii, Etrac and CTX 3030. This is ofttimes called total band spectrum frequency technology assuasive the user to get the best depth and accuracy at the aforementioned time. This is more than oftentimes constitute on Pulse induction machines.

Metal Detector Frequency Comparison Chart:

Brand	Model	Frequency Type	Frequecny	Technology
Garrett	Ace 150	Single	6.5 Khz	Vanquish frequency.
Garrett	Ace 250	Single	6.five Khz	Beat frequency.
Garrett	Ace 350	Unmarried	8.25 Khz	Beat frequency.
Garrett	Sea Hunter	Multiple (manually adaptable)	7.5 Khz	Pulse consecration.
Garrett	AT Pro	Single	xv Khz	Trounce frequency.
Garrett	Infinium	Multiple (manually adjustable)	seven.iii Khz	Pulse consecration.
Garrett	GTI 2500	Multiple (manually adjustable)	7.2 khz	Pulse induction and Beat frequency.
Garrett	AT Gold	Single	18 Khz	Beat frequency.
Minelab	GPX	Multiple (manually adaptable)	Multiple specially calibrated to conditions selected.	Pulse induction.
Minelab	Eureka Gold	Triple	6.4, 20, 60 Khz	Pulse induction.
Minelab	Xterra 305	Unmarried	7 Khz or xviii.five Khz with a different coil.	Pulse induction.
Minelab	Xterra 505	Unmarried	7 Khz or 18.5 Khz with a dissimilar coil.	Pulse induction.
Minelab	Xterra 705	Single	7 Khz or eighteen.5 Khz with a unlike coil.	Pulse induction.
Minelab	Xcalibur 2	Multiple (17 concurrent)	i,5 – 25,5 Khz	BBS Broad band spectrum Pulse induction.
Minelab	Etrac	Multiple concurrent	1,5 – 100 Khz	FBS Full band spectrum Pulse induction.
Minelab	CTX 3030	Multiple concurrent	1,5 – 100 Khz	FBS Total band spectrum Pulse induction.

Frequency and Electrical conductivity.

Metal objects in the ground all conduct electricity ameliorate or worse. This may be plotted on a scale from Ferrous atomic number 26 on the low side to Non Ferrous silver on the high side with gilded and foil somewhere in the middle. This is often the basis for the LCD screen layout every bit you tin meet on the Garrett Ace.

Hobby metal detectors can tell the type of metal by how well it conducts electricity of the frequency pulses information technology sends into the ground (normally the speed that the signal sent back decays over time.) This allows the modern hobby metal detector to discriminate betwixt metals and not simply indicate the type of metallic it thinks it's found only as well allows y'all to screen out sure metals like fe if you want to end the detector from picking them up.

Whether information technology is a simple single frequency machine similar the Ace 350 or a complex machine like the Etrac using i – 100 Khz at the aforementioned time frequency is an of import consideration when making your buy.

We hope this helps your choice and agreement of a hobby metal detector and frequency!

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Source: https://metaldetectorsa.co.za/frequently-asked-questions/frequency-and-your-metal-detector/

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