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What is the deepest detector AM wise
Posted by tnsharpshooter
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Re: What is the deepest detector AM wise August 17, 2016 07:24PM |
Comparison on a clad/silver dime in the air without discrimination on various detectors (longer red bar the greater the distance from coil to target, in inches). For instance, in the air the XLT managed an average of 14.2" on a dime while the Tesoro Amigo2 averaged 5.9".
Blue values and blue wavy line is the efficiency of the detector coil - (Coil Area / Distance) = Efficiency. A big coil that gets poor distance yields a bigger number, which indicates a less efficient coil. The average of all detectors is the horizontal blue line, which has an average on a dime of 7.1. This means if the blue efficiency value is lower than 7 (e.g., 3, 4, 5, and 6), those particular coils are more efficient than the average coil efficiency on a dime. In other words, it's a more sensitive coil on dime-sized targets. This doesn't make the coil deeper than other coils that are larger however.
Putting this together: Even though a coil may be small and efficient for its size (efficiency numbers below 7) the overall distance achieved on a dime will be greater as coil size increases, even on a less efficient coil. For instance, the White's Quantum XT as tested had a larger coil with 124sq-in of area as compared to the White's XLT coil with 71sq-in. But the XLT performed better (14.2" vs. 11.4" ). The Efficiency of the XLT is 5 (better than average) while the Quantum's Efficiency was 11 (worse than average).
While many of the detectors listed are older, you can at least get a feel for their relative performance. For instance, though the ACE 250 is a popular detector and has an Efficiency score better than average, it did not perform as well as many other detectors. Also, as with other results, it is a collection of averaged results from a variety of tests by various people. Subjective variation is to be expected, which is why the results are averaged across all tests (assuming that particular detector was tested more than once - more testing will reduce errors).
In any case, for grins ...
-Johnnyango
Blue values and blue wavy line is the efficiency of the detector coil - (Coil Area / Distance) = Efficiency. A big coil that gets poor distance yields a bigger number, which indicates a less efficient coil. The average of all detectors is the horizontal blue line, which has an average on a dime of 7.1. This means if the blue efficiency value is lower than 7 (e.g., 3, 4, 5, and 6), those particular coils are more efficient than the average coil efficiency on a dime. In other words, it's a more sensitive coil on dime-sized targets. This doesn't make the coil deeper than other coils that are larger however.
Putting this together: Even though a coil may be small and efficient for its size (efficiency numbers below 7) the overall distance achieved on a dime will be greater as coil size increases, even on a less efficient coil. For instance, the White's Quantum XT as tested had a larger coil with 124sq-in of area as compared to the White's XLT coil with 71sq-in. But the XLT performed better (14.2" vs. 11.4" ). The Efficiency of the XLT is 5 (better than average) while the Quantum's Efficiency was 11 (worse than average).
While many of the detectors listed are older, you can at least get a feel for their relative performance. For instance, though the ACE 250 is a popular detector and has an Efficiency score better than average, it did not perform as well as many other detectors. Also, as with other results, it is a collection of averaged results from a variety of tests by various people. Subjective variation is to be expected, which is why the results are averaged across all tests (assuming that particular detector was tested more than once - more testing will reduce errors).
In any case, for grins ...
-Johnnyango
