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How detectors was tested
There are different approach to test metal detectors.
One of easiest way, but usually pretty far from "in field reality" is air test. Air test can tell us, if detector work properly, but cannot tell us how it perform in real field.
Other, widely used and pretty close to real in field condition, is test with (usually in backyard) buried targets. Quite real test, but has his cons: problem with targets position after time, soil is a living thing and target can be moved by water streams, rodents etc., we cannot assure constant soil conditions, as: humidity, mineralisation, micro-biotic system status etc, therefore results obtained in bigger time intervals are not comparable.
So we need something like standardised soil, to assure equal testing conditions and comparable results over different time intervals. After testing different possibilities, I decided to use, for this purpose, expanded clay by brand name LIAPOR. Web site of producer: http://www.liapor.com/en/basic.php?n=0101
This expanded clay granulate, born in fire, is equal to high mineralised soil. So near to usual prospecting soil conditions. If we remember famous Roman brick, made out of clay too, so this two materials have much in common.
Using expanded clay, as testing substrate, I can assure equal testing conditions to all tested detectors no matter of time intervals between tests and in such way allways comparable results.
My first testing plant was someway limited, regarding coil sweeping space over it, which can lead, by given GEB sensitive detectors, to some unwanted instability:
With new testing plant, I overcome those coil sweeping limitations:
Testing targets are fixed to the end of tailor meters and can be easily immersed by hand in testing substrate and then slowly pulled out, till clear detecting in both coil sweeping directions:
My standard testing samples are:
- 1.1gram genuine gold nugget
- 1.1gram gold pendant 15mm of diameter
- silver coin 30mm in diameter
I perform cache (hoard) test, by using 5.5kg of different coins in ceramic pot, placed under 50cm of expanded clay substrate:
Additionally, as regular test, I perform general depth capability test, on buried beer can in field, at depth of 55cm:
TESORO EURO SABRE II test
Euro Sabre was tested equipped with 4 coils:
- Tesoro DD 11x12 inch
- Tesoro Widescan 8 inch
- Tesoro Spider 8x9.5 inch
- Detech SEF WSS 5x10 inch
The concept of detector Euro Sabre II can be perceived as a complete classic (with the analog user interface). The correction of GB and Threshold in Discrimination mode can give us possibilities that depth of detection can be further increased.
Euro Sabre II can be currently purchased in the Czech Republic or Slovakia in EU. In France we can gets this model under the name "Invincible". I bought mine here: http://www.detektory-kovov.sk/predaj...-EuroSabre-II/.
For comparison, here test results of Minelab Explorer SE (from photos above):
Settings: Sens=max, Threshold= no difference between 0 to 13, FerroMask= AllMetal
Gold nugget and gold pendant tested in Jewerly mode.
Silver coin tested in both: Coins and Jewerly modes with pretty same results.
Measurement for Explorer SE:
- gold nugget 1.1gram detected at depth of 2cm
- gold pendant of 1.1grama, diameter 15mm detected at 13cm
- silver coin diameter 30mm detected at 22cm.
Cache (hoard) test under 50cm substrate – not detected
Test results for Tesoro Euro Sabre II:
There are different approach to test metal detectors.
One of easiest way, but usually pretty far from "in field reality" is air test. Air test can tell us, if detector work properly, but cannot tell us how it perform in real field.
Other, widely used and pretty close to real in field condition, is test with (usually in backyard) buried targets. Quite real test, but has his cons: problem with targets position after time, soil is a living thing and target can be moved by water streams, rodents etc., we cannot assure constant soil conditions, as: humidity, mineralisation, micro-biotic system status etc, therefore results obtained in bigger time intervals are not comparable.
So we need something like standardised soil, to assure equal testing conditions and comparable results over different time intervals. After testing different possibilities, I decided to use, for this purpose, expanded clay by brand name LIAPOR. Web site of producer: http://www.liapor.com/en/basic.php?n=0101
This expanded clay granulate, born in fire, is equal to high mineralised soil. So near to usual prospecting soil conditions. If we remember famous Roman brick, made out of clay too, so this two materials have much in common.
Using expanded clay, as testing substrate, I can assure equal testing conditions to all tested detectors no matter of time intervals between tests and in such way allways comparable results.
My first testing plant was someway limited, regarding coil sweeping space over it, which can lead, by given GEB sensitive detectors, to some unwanted instability:
With new testing plant, I overcome those coil sweeping limitations:
Testing targets are fixed to the end of tailor meters and can be easily immersed by hand in testing substrate and then slowly pulled out, till clear detecting in both coil sweeping directions:
My standard testing samples are:
- 1.1gram genuine gold nugget
- 1.1gram gold pendant 15mm of diameter
- silver coin 30mm in diameter
I perform cache (hoard) test, by using 5.5kg of different coins in ceramic pot, placed under 50cm of expanded clay substrate:
Additionally, as regular test, I perform general depth capability test, on buried beer can in field, at depth of 55cm:
TESORO EURO SABRE II test
Euro Sabre was tested equipped with 4 coils:
- Tesoro DD 11x12 inch
- Tesoro Widescan 8 inch
- Tesoro Spider 8x9.5 inch
- Detech SEF WSS 5x10 inch
The concept of detector Euro Sabre II can be perceived as a complete classic (with the analog user interface). The correction of GB and Threshold in Discrimination mode can give us possibilities that depth of detection can be further increased.
Euro Sabre II can be currently purchased in the Czech Republic or Slovakia in EU. In France we can gets this model under the name "Invincible". I bought mine here: http://www.detektory-kovov.sk/predaj...-EuroSabre-II/.
For comparison, here test results of Minelab Explorer SE (from photos above):
Settings: Sens=max, Threshold= no difference between 0 to 13, FerroMask= AllMetal
Gold nugget and gold pendant tested in Jewerly mode.
Silver coin tested in both: Coins and Jewerly modes with pretty same results.
Measurement for Explorer SE:
- gold nugget 1.1gram detected at depth of 2cm
- gold pendant of 1.1grama, diameter 15mm detected at 13cm
- silver coin diameter 30mm detected at 22cm.
Cache (hoard) test under 50cm substrate – not detected
Test results for Tesoro Euro Sabre II: