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In 1964, when Eleanor and I first began selling and marketing our metal detectors, we had no idea the great impact our company would eventually make in the metal detection industry. In fact, we only did what we knew how to do - make the best metal detector and sell it at a fair and reasonable cost. Since that time, we have been dedicated to making sure our customers are our number one priority.

The Garrett name has come to stand for more than metal detection; it is a philosophy for unparalleled customer satisfaction. While it is true that we believed then, as we do now, that our metal detectors could lead the industry in capabilities and results, we recognized early on that commitment and loyalty to our customers would be our true source of success.

We have learned over the years that there is no price advantage program, special product feature or other promotional advantage that can replace a satisfied customer. We stand behind the idea that one happy customer can be more valuable than the most elaborate advertising campaign. Customer satisfaction will never go out of style and a company that is willing to provide it will always be held in high regard.

Now, at the genesis of a new century and as Garrett moves forward, the company has set goals to empower our customers with better products, better technology and better information.

Garrett's mission is to continue the tradition of building great hobby and security detectors for many generations to come.

How Metal Detectors Work

A metal detector consists of three basic parts (a) the coil, (b) a power supply, and (c) the control box. Inside the coil there are normally two sets of copper wire windings. As electrical current from the battery is passed through one of these windings, an electromagnetic field is created and sent into the ground. This winding is normally called the transmit winding.

Metal objects conduct electricity and alter the electromagnetic field. The alteration of the fields caused by the presence of a metal object is picked up by the second winding in the coil, the receive winding.

This alteration is sent to the control box where it is interpreted as being caused by a metal object and an audible signal is given to alert the operator.

Metal detectors which discriminate between various metals, do this by testing the conductivity of the metal, eliminating target signals that have a conductivity that matches unwanted metals (trash) like iron & steel, pull tabs, bottle tops, etc and signalling on high conductive metals like gold, brass, silver etc.

Detector Classifications

There are broadly three types of metal detectors, which we make for the consumer market:

What difference does frequency make?

Measured in kilohertz, the frequency is the number of times a signal is transmitted into the ground and received back, per second. The lower the frequency used by the detector, the deeper it can normally penetrate. At low frequencies however, the sensitivity to small targets is sometimes reduced. The higher the frequency, the higher the sensitivity to small targets, but it may not penetrate as deeply. In general, gold detectors operate at higher frequencies (to find small nuggets) while coin and treasure detectors work at lower frequencies for deeper penetration, (the exception to this is MPS type metal detectors that are sensitive and deep-seeking simultaneously).

NOTE: Frequency is only one of the factors that will determine depth & sensitivity, therefore only use it as an indicator.

Types of discrimination

Discrimination is the ability of the detector to identify the type of metal object found and eliminate the unwanted items and indicating only on the desirable ones.

Variable Discrimination - This is the most basic of discrimination types. It works like a demarcation line in the conductivity level. The level can be set by the operator and all metals with a conductivity lower than where the level is set are eliminated & all metals with a higher conductivity are accepted.

Notch Filter Discrimination - If all metals were arrayed in order of their conductivity, from least conductive to most conductive, Notch Filter discrimination segments that array into "Notches" and each notch or segment can then be accepted or deleted. Depending on the number and width of the notches offered on the model of detector, will determine to some degree how selective the detector can be at eliminating junk from good targets.

Tone identification - Some detectors will indicate the possible ID (identity) of a target, by changing the tone of the target signal. Generally low conductive metals will give a lower tone while highly conductive metals will give a higher pitched tone.
Identification meter - Most coin & treasure detectors today, offer a meter or LCD screen, which will identify the target using either graphic display or numeric numbers.

Note: The accuracy of discrimination is dependant on the repeatability of an object having the same conductivity as other samples of the same object. Man made objects will normally be consistent in their conductivity, however naturally occurring gold nuggets will often have variations in their purity and therefore their conductivity. For this reason, most gold prospecting detectors tend to have more basic discrimination, often only identifying ferrous from non-ferrous objects.

What differences are there in coils?

Size : - The size of a coil can influence the depth or sensitivity of a detector. The larger the coil, the deeper it tends to detect but the less sensitivity it has to tiny targets. The smaller the diameter, the more sensitive it becomes but with less depth.
Smaller coils will also be lighter weight, easier to control and may be chosen for their ability to negotiate difficult terrain or undergrowth.

Shape :- the most common shapes of coil are:- the conventional solid Round coils, the Elliptical shaped coils and the Open-web coils. The main reason for change to shape is to conform to a physical requirement, i.e. the elliptical coil can be pushed around bushes or between stony country easier than round coils. Open-web coils help cut through water when wading or detecting underwater. These coils are also popular for their reduced weight. Conventional round coils are often the more stable & high performing coil and are particularly popular when gold prospecting.

Configuration: - the three most common types of coil windings are Concentric, Double D, and Monoloop. The difference between these coil types is the pattern the wire is wound within the coil.

Concentric - has an inner circle and an outer circle wire winding. It's search pattern is cone shaped and can be useful for accurately pinpointing the target. Concentric coils tends to be more noisy in highly mineralised ground and requires more overlap of sweep for thorough ground coverage.

Double D wound coils are now the preferred coils for most detecting. They give a blade or chisel shaped signal that covers the ground more uniformly and once an operator becomes accustomed to the signal, pinpointing is no hardship. Double-D coils are also preferred for their superior ground balancing ability.

Monoloop coils are a special style of coil for the MPS technology detectors (SD & GP Series). These coils have one winding of wire around the circumference of the coil and this winding to used to both transmit and receive. The signal pattern of the Monoloop coil is cone shaped requiring more overlapping and in extremely heavily mineralised grounds they can be more difficult to ground balance, however they tend to provide slightly better depth than the Double D coils.

It's time you hit paydirt. When you're ready to step up to the world's finest metal detectors, you're ready for Bounty Hunter. And get set to dig deep. Not into your pocket, but into the ground. That's because a genuine Bounty Hunter metal detector can eke out virtually any metal object from any terrain- yet even with all their features, they are surprisingly affordable.

Bounty Hunter metal detectors are made by First Texas Products, with over 30 years of experience, and a list of features and patents that keep the competition playing catch-up.

Features like Precise LCD readout of target and depth . ... . four-level Iron discrimination . . . selectable rejection of low-value targets . . . "Smart Trac" auto ground-balancing . . . All combined in lightweight, rugged, ergonomic housing. All backed by a solid five-year warranty.

So whether you're coin shooting or gold prospecting, searching for jewelry or just a buried water valve, there simply is no better choice for today's treasure hunter . . . than the Bounty Hunter metal detectors.

My name is James Gifford and my parents Jack and Myrna Gifford founded Tesoro Electronics over twenty years ago in our family garage, but the story of Tesoro really starts with Jack in the early 60's. At that time, Jack was working in retail sales, but he wanted to be part of the booming aerospace industry. So he went to school, worked hard, and eventually became an electronics technician. During one of his earlier jobs, Jack found a number of Electronics Engineers that were willing to share their knowledge, and he learned the skill that would guide his career for the next 35 years.

As an up and coming engineer, Jack was a founding member of the company Phoenix Data. After several years with Phoenix Data, Jack decided to expand his horizons and become a consulting engineer. During that time, Jack was involved with a number of different projects. Companies as diverse as QuikerLiquor-a company that made a drink dispenser that was attached to a cash register. It poured the drink and rang it up at the same time-to Motorola working on several projects including a silicon crystal growing plant. The silicon was then cut and processed to make microchips.

In 1975 Jack got a call saying that a company by the name of Bounty Hunter was looking for an engineer. Metal detecting as a design project and as a hobby caught his attention. With all of his other projects, Jack was never able to use or see the use of his designs. It was then that Jack became an avid detectorist. Not only was he aware of what the detector would do on the bench, he knew first hand what it would do in the field. This experience helped him design the TR500. At that time it was the best selling detector that Bounty Hunter had ever made.

While at Bounty Hunter, Jack and a fellow employee, Ray Crum, decided to form their own metal detecting company, and C&G Technology was born in 1976. C&G was successful with a number of Jack's designs such as the Bobcat, Lynx and the Wildcat. Being that it was a family owned business, Jack also gained a lot of experience with all phases of production as well as design. My first job for any metal detector company was with C&G. In fact at that time the whole Gifford family was working for C&G. Jack did design and testing, Myrna stuffed boards and made coils, while my brother Vince and I had several odd jobs.

Unfortunately, some partnerships just don't last and the relationship between Ray and Jack ended. But by that time Jack had established himself in the metal detecting industry as an engineer that could really design great detectors. So as Jack was leaving C&G, he got a call from Ed Lewis, president of Fisher Research Labs, with a job offer. Jack moved us out to Los Banos, California in 1978 and started working with Fisher. While there Jack was involved with several projects including the 551 and 552, updating the TW5 and several industrial pipe and cable locators.

1979 marked the year that Ray Smith had purchased Bounty Hunter. He was looking for a new engineer to help his company grow. A couple of phone calls and a job offer later, Jack agreed to move back to Arizona and work with Ray at Bounty Hunter. During this time, Jack designed on the Rustler, the Raider, and did updates on the Red Baron series. It was at Bounty Hunter that Jack first met Rusty Henry. Jack and Rusty hit it off almost immediately. Both were avid treasure hunters, and they both took every opportunity they could to go test both new and old products. Later that year, Ray was diagnosed with cancer and was forced to sell the business. Shortly after that, both Jack and Rusty left Bounty Hunter. Rusty went to the gold fields of Australia, and Jack went on to start Tesoro Electronics.

In July of 1980 dealers all over the country received a letter from Jack announcing the founding of Tesoro Electronics Inc. The first two paragraphs laid out the direction that Jack wanted the company to go and the ideas that we still live by today:

"It has become apparent to me over the past few years that there is a place for, even a need for, a metal detector manufacturer who is dedicated to the independent dealer market. The products should utilize the best of today's technology to provide maximum sensitivity. They should be rugged, but light enough that anyone can use them. They should do their job without "bells and whistles" that only increase the cost. And finally, the company should remain loyal to their dealers and be responsive to their needs and desires. It is with these principles in mind, that TESORO was founded in May of this year.

Tesoro is the Spanish word for treasure. The Spanish certainly seemed to understand and appreciate tesoro. Never in the history of the New World has there been a treasure hunt like the Spaniards held. It's hard to think of a better name for a company associated with treasure hunting, or a better symbol of our goals than the conquistador. As the Spaniards were yesterday's undisputed masters of treasure hunting, we at TESORO will always endeavor to meet our goal of making TESORO Metal Detectors today's undisputed masters of treasure hunting."

The letter went on to introduce the first Tesoro metal detector?the Deep Search VI. Myrna was working full time as Tesoro's first employee. Vince and I were still going to school at this time but worked part time here and there at Tesoro to make extra money. We would not join the company full time until much later.

After the Deep Search VI, the Deep Search IV and Deep Search VII were introduced. 1981 saw the introduction of the Aztec, the Cort?s and the Amigo. Up until late 1981, all Tesoro detectors were covered by a two-year warranty. In that year Jack and Myrna made metal detecting history by introducing the first true Lifetime Warranty in the industry. They then grandfathered in all of the other detectors that they had previously made so that every Tesoro had the same warranty. Our Lifetime Warranty has covered units that have been made for the last 20 years and will continue to cover them for as long as we are around.

Metal Detectors
Original Cort?s

1981 was the year for the introduction of another first for Tesoro. In December of '81, Jack and Myrna introduced the Metal Detector Information magazine or MDI. Jack started with the idea of teaching the customer about the ins and outs of metal detectors and metal detecting. Several articles were basic detector knowledge that could be used by any detectorist no matter what detector he was using. By making a more educated customer, Jack felt that they would see the advantage of buying a Tesoro detector. Since then, the MDI has become Tesoro's single best form of advertisement.

1982 brought the Scout and the Mayan and 1983 started with the introduction of the Inca and ended with the beginning of our most popular detector series, the Silver Sabre. While our competitors were making "Lunch Box" detectors, (machines big enough to carry your lunch in), Tesoro introduced the first small, lightweight, full power detector. The critics sneered and bought them for their wives and children. But when they were being out hunted by their wives "toy machine," they discovered the power of the Silver Sabre. Since 1983 the Tesoro lineup has always contained a Silver Sabre model.
Scout & Mayan

In 1984 Tesoro diversified and increased its market share by making two different private label agreements. The first was with Montgomery Wards catalog sales department. Wards wanted a detector line that was both well known and distinctive to their store. After some negotiation, Tesoro agreed to produce the Sabre II and the Sabre Supreme. These detectors had Tesoro Technology in a different shape and color of the control housing. After the deal was set and the catalogs produced, Wards decided to get out of catalog sales. So Tesoro was featured in the very last Montgomery Wards catalog that was ever produced.

The second private label agreement was with a company called Turtle. At that time Turtle made an underwater detector. The case was great, but the electronics were not. So Tesoro and Turtle entered an agreement where Tesoro would make the electronics and Turtle would assemble the final product and cover the warranty. The model, Silver Turtle, was produced for several years and was very popular with the very early water hunters.

1985 brought the Golden Sabre and the Cutlass and 1986 introduced the Silver Sabre Plus, the Eldorado and the Royal Sabre. In this time the Golden Sabre and Eldorado were very popular. The Golden was our first detector with notch filter discrimination. The Eldorado was a simple detector with a manual ground balance, but with a new style of circuitry that worked incredibly well in the highly mineralized soil. All of the relic hunters soon found their favorite Tesoro detector.

Silver Sabre Plus

The Toltec 100 was the only model that was introduced in 1987, but what a detector. The Toltec 100 did it all. It had a target ID meter, a notch discrimination, a push button mode change and a manual ground balance. I still have customers today ask for a Toltec 100. The Toltec 80 and Diablo were introduced in 1988.

1988 also saw the introduction of the Authorized Dealer Program. At that time several major discount houses were in a price war. These big dealers were literally selling detectors (both ours and other manufacturers) at or below wholesale costs. We felt that it devalued detectors in general and was slowly putting the independent dealer out of business. Our Authorized Dealer Program helped level the playing field between discount house and independent dealers and let the dealers know what was expected of them. By holding dealers to a higher set of standards, we get a better set of dealers.

In November of 1988 (on my 25th birthday), Jack and Myrna took me to dinner and outlined a plan that would help Tesoro expand its market share and asked me if I would like to be involved. I had been working as a kitchen manager for several years and was looking to try something new so I agreed. I felt that I had some very good skills to bring to Tesoro. In the kitchens quality and appearance is everything. If something is not just right, it gets sent back right then. So I learned to make sure it was done right the first time. I also dealt with the public and worked with a large number of vendors giving me a large number of people skills that are needed in the management of any business. I spent the next couple months learning every phase of metal detector manufacturing until we were ready to start our plans.

In 1989 we started a sister company to Tesoro called Yavapai Industries. My job was two-fold. First, I was to train a crew in Prescott, AZ and manufacture several private label projects that we had in the works. Second, I was to provide a pool of skilled persons to help Tesoro move from Phoenix to Prescott. My first private label project was Pillar metal detectors. They had two models-the 4 Reale and the 8 Reale. Both models were slightly modified Silver Sabre PCBs. The 4 Reale had a factory preset ground balance and the 8 Reale had a manually adjusted ground balance. The owners of Pillar requested that no connection between Pillar and Tesoro be advertised. When Pillar went out of business, we knew the power of the Tesoro name backing a private label. Since then every private label that we have manufactured has had "manufactured by Tesoro" somewhere in its advertising or packaging. We have also made no attempt to modify or change the basic circuitry from any current Tesoro product to manufacture private label product.

1989 also saw the introduction of the Golden Sabre Plus and the Lobo. The Lobo had two very unique features. It was the first gold prospecting machine that was introduced with silent search discrimination. The Lobo became an all-purpose machine that could find the tiny nuggets and shoot coins without finding the nasty trash. It was also the first Tesoro detector that had a plastic housing. In the next couple of years, all Tesoros would be put into plastic housing. The Golden Sabre Plus was the last Tesoro detector that was put into a metal housing. 1990 model introductions included the Bandido and the Pantera.

Golden Sabre Plus

1991 was a very busy year for the Tesoro crew. Not only did we introduce the Diablo II, the Silver Sabre II and the Stingray, but we also built our first private label detector for the European market-the Laser B1-and we moved from Phoenix to Prescott. When Tesoro moved up to Prescott in 1991, Yavapai Industries was absorbed into Tesoro Electronics. Yavapai Industries had done the initial prototype work for the Laser B1, but it was Tesoro that actually produced it. I was very happy to see New Year's Eve that year and welcomed 1992.

In 1992, as things were settling down, Jack found that Rusty Henry had moved back from Australia and was working in Prescott part-time as a bus driver for the Prescott school system. He was looking for another part-time job so Jack offered him the position of Service Manager. Jack knew that Rusty would be very valuable checking in repairs and final testing them as they were finished. With all of his experience with metal detectors, Rusty could easily make sure that all repairs were finished to Tesoro's high standards. Rusty has continued to work with Tesoro ever since. In 1992 we introduced the Cutlass II, the Golden Sabre II and the Laser B2. In 1993 we came out with the Bandido II.

1994 marked a year of some unexpected design changes. In the year we introduced the Toltec II. We already had the lower housing designed, but we needed a housing for the meter that would mount on the pole. We worked with our plastic's vendor at the time, and he said it would be no problem to whip up an inexpensive and easy meter housing. He was wrong, but it turned out to be a blessing in disguise. By the time we received the meter housing, our vendor had gone way over budget on design and the mold. We knew that we were not going to sell enough Toltec II's to make up the cost so we figured that another unit would help defray the costs. That unit was the Sidewinder. We figured that it would sell for the competition hunter, but we had no idea that it would take off so well and become our ?Max series of detectors.

In 1995 we introduced a new water housing along with the Piranha and the Stingray II. Both had an industry first: interchangeable coils. We also manufactured the Laser B3. In 1996, we upgraded our technology and introduced the ?Max series of detectors. To get our electronics into the small housing, we had to work with Surface Mount Technology. Parts so small that human hands cannot place them. They must be placed with a computer-aided robot. These parts were becoming much more abundant as they were used in laptop computers. They also had a much tighter tolerance, which allowed us to increase the depth and sensitivity in the ?Max series without increasing the size of the printed circuit board. These detectors included the ?Max Bandido, ?Max Cutlass, ?Max Diablo, and ?Max Sidewinder. Also introduced was the Amigo II.

1997 was the beginning of two different projects that have had a significant impact on recent Tesoro history. The first was the forming of another sister company called Industrial Detection Systems or IDS. IDS was started to apply Tesoro technology to industrial applications. Over the course of years, IDS has had projects with a number of companies including several banks, a street refinishing company and the Naval Explosives, Ordnance and Demolitions Dept. My brother Vince started the company and worked as a contract engineer for Tesoro on several other projects.

The second project started when Troy Galloway of Troy Custom Detectors contacted us and asked for a private label detector of his own. Troy is an avid hunter and tried almost every detector on the market looking for what would suit his detecting style. He found that Tesoro products worked best for him. During a trip to England, he tried a Laser B1 and heard about our partnership with Treasure World to produce them. He wanted to try to capture a niche market here in the US and contacted us to help him. Thus the Shadow X2 was born. Other models that were introduced in 1997 were the Lobo SuperTRAQ, the Laser PowerMax, the Bandido II ?Max and the Silver Sabre ?Max.

1998 brought the Cutlass II ?Max, while 1999 brought the Sand Shark and Laser Rapier. The year 2000 saw the introduction of the Conquistador, the Compadre and Tiger Shark. Tesoro also purchased IDS and Vince Gifford became a full-time employee of Tesoro. The year 2000 marked another milestone in Tesoro history. Vince and I were made stockholders in the company.

The Cort?s, Conquistador ?Max, Eldorado, Euro Sabre, and Silver ?Max were added in 2001, and the DeLe?n and Tej?n became part of our line of detectors in 2003. Our latest models, the Cibola and Vaquero, were introduced in 2004.

After many dedicated years, Jack and Myrna retired in late 2004, and the family business is now being managed by Vince and me.

In the late 1920?s, Dr. Gerhard Fisher, a German immigrant who studied electronics at the University of Dresden, obtained the first patent ever issued on aircraft radio direction finders. He was working as a Research Engineer in Los Angeles, California at the time and his work attracted the interest of Dr. Albert Einstein. After a demonstration of Dr. Fisher?s equipment, Einstein enthusiastically and correctly predicted the world-wide use of radio direction finders in the air, on land and at sea. When using such direction finders during those early years, aircraft pilots found that errors would occur in their bearings when metal objects came between the transmitter and receiver, or whenever they passed over certain areas. Different pilots flying different planes always observed the same errors over the same places. When Dr. Fisher investigated this phenomenon, he found these errors to be the result of highly conductive, mineralized areas. Dr. Fisher concluded that a portable electronic prospecting instrument could be developed that used the same principle to detect the presence of small buried objects and ore deposits. He continued his research into this phenomenon, and in 1931 he founded Fisher Research Laboratory in a garage behind his home at 1505 Byron St. in Palo Alto, California. He and four employees began producing the "Metallascope," starting each unit as a new order came in.

The "Metallascope" was a rugged, easy-to-use metal detector. By today?s standards, it was perhaps an ungainly device: two large, flat wooden boxes containing simple copper coils, five vacuum tubes, and a few assorted components. It soon captivated the imagination of the country, and within a short time, the world. USS MACON CRITICAL TOOL FOR DR. FISHER Around 1933, the U.S. Navy hired Dr. Fisher to install a radio direction finder aboard the dirigible, the USS Macon. The massive air ship is shown here mooring inside of historic Hangar One at NAS in Sunnyvale, California (formerly Moffett Field). It was aboard the Macon that Dr. Fisher discovered that large metal buildings and mineralized mountains cancelled out the instrument?s direction finding capabilties leading him to the discovery of the first metal detector. Dirigibles served the U.S. Navy as floating bases for scout planes during the 1930?s, but the program was eventually abandoned. It became obvious that the highly touted U.S. Navy lighter-than-air program had a fatal flaw: dirigibles had a tendency to crash during severe weather. (Official U.S. Navy Photo) Metal Detectors

By 1936, sales had increased to the point where the garage was no longer large enough. Fisher Research Laboratory moved to a small building at 745 Emerson St. in Palo Alto. Shortly thereafter, Dr. Fisher was granted a patent for his "Metallascope." The "Metallascope" was soon nicknamed the M-Scope, and as such, became an accepted standard for all types of electronic metal detection: geologists located ore, treasure hunters found treasure, utility companies located buried pipes, lumber mills located metal inclusions in sawn logs, and law enforcement agencies used it to locate abandoned or hidden weapons

In 1939, just prior to World War II, Fisher moved to an even larger building at 1961 University Ave. in Palo Alto. During World War II and the subsequent Korean Conflict, the company was called upon to contribute its technical competence to the war effort, but the M-Scope business was never neglected. With the increasing popularity of the M-Scope, and with Fisher?s patent rights expiring, numerous competitors began producing similar equipment. Due to relentless efforts to incorporate every available technical advancement - and in particular, by keeping close contact with countless users to utilize their vast fund of field experience in the design of new models - Fisher maintained its position of solid leadership. Over the years, Fisher has designed and produced such sophisticated products as geiger counters, radio communication systems, voltage detectors and cable fault locators.

n 1961, Fisher moved to an even larger production facility in Belmont, California. In 1967, Dr. Fisher retired, having firmly established his name in the annals of electronic history. The company continued to grow, and in 1974, Fisher Research Laboratory moved 90 miles southeast to a building on I Street in Los Banos, California. In 1990, Fisher built a spacious, modern manufacturing plant in the Los Banos Industrial Park, where the world's oldest metal detector business has since resided.

Accurate has been in business since 1993. In our effort to support the metal detector industry we have added many new product line in hopes of have a machine to fit any detectors needs.

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How Metal Detectors Work

Detector Classifications

What difference does frequency make?

Types of discrimination

What differences are there in coils?