Thank you for posting this question. Kellyco is the largest and oldest metal detecting distributor in the world! You’ve contact the right place and detectorist team.
In response to your first question, manufacturers do not provide exact depths because depth is subject to many variables, such as the size of a target, type of soil, target decay, size of the coil and detector technology (i.e., frequency, VLF vs. Pulse Induction).
In regards to the second question, if the pasture land is high, and you can’t lower the detector to about 1” off the ground, you might want to mow the pasture before detecting; other wise, you will be air detecting (not efficient). You want to place the detector the closest to the ground surface as possible to maximize soil penetration. It’s the same as snow.
The Minelab Quattro is an excellent metal detector. Double click on the following links for information, specs and testing of this detector:
http://www.kellycodetectors.com/minelab/quattro-stand.htm
http://www.kellycodetectors.com/Field Test Reports/minelab/we-quattro-2006.html
We do not have any new or used Quattros. They have been discontinued since there is a newer and better model that replaced it; the Safari. See the link below. We have an awesome sale going on with many free accessories, eligibility for a BOGO sale, and an exclusive Free 1 year extended warranty on top of the manufacturer’s warranty. No one can beat our prices and deal:
http://www.kellycodetectors.com/minelab/safari_buy.htm
Lastly, if you are looking for detection greater than 12 inches, you must look into purchasing ground penetrating locators, deep penetrating instruments, geophysical penetrating instruments, or two box detectors. If this is your case, or if you have any other question, please contact any of KELLYCO’s sales consultants at 1.800.327.9697 Monday thru Friday from 8 am to 9 pm or Saturday’s 9 am to 5 pm (U.S. Eastern Time). All KELLYCO Sales Consultants are factory trained and experienced detectorist and will be able to answer your questions and assist you with your purchase.
I hope this information is helpful, if I can be of any further assistance please let me know.
Thank You,
Bridget Hall
jimmy uk said:
hi ive been looking at a minelab Quattro for a while now and have reading on the write ups it seems like a great machine and for what you get for the money second hand he seems like your getting a good deal! can you answer a few Question please
1) how deep does this machine go?
2) is this machine any good on pasture land ?
i was thinking about a old school XS 
