Page 1
9-FUNCTION
METAL DETECTOR
67378
SET UP AND OPERATING INSTRUCTIONS
Visit our website at http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2009 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Revised Manual 10b
Page 2
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures. Write the product’s
serial number in the back of the manual
near the assembly diagram (or month
and year of purchase if product has no
number). Keep this manual and the
receipt in a safe and dry place for future
reference.
IMPORTANT SAFETY
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
General Power Tool Safety
Warnings
INFORMATION
In this manual, on the labeling,
and all other information
provided with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING
indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in electric
shock, re and/or serious injury.
Save all warnings and
instructions for future reference.
The term ″power tool″ in the
warnings refers to your battery-
operated (cordless) power tool.
Electrical safety1.
Do not expose power tools to rain
or wet conditions. Water entering
a power tool will increase the risk of
electric shock.
Personal safety2.
Stay alert, watch what you are a.
doing and use common sense
when operating a power tool. Do
not use a power tool while you
are tired or under the inuence
of drugs, alcohol or medication.
A moment of inattention while
operating power tools may result in
serious personal injury.
Do not overreach. Keep proper b.
footing and balance at all times.
Page 2 For technical questions, please call 1-800-444-3353. SKU 67378
Page 3
This enables better control of the
power tool in unexpected situations.
Power tool use and care3.
Do not use the power tool if the a.
switch does not turn it on and
off. Any power tool that cannot
be controlled with the switch is
dangerous and must be repaired.
Remove the batteries from b.
the power tool before making
any adjustments, changing
accessories, or storing power
tools. Such preventive safety
measures reduce the risk of starting
the power tool accidentally.
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Handle Tool carefully at all times. 2.
Dropping Tool can cause damage to
circuit boards and housing, which can
cause the tool malfunction or failure.
Position batteries in proper polarity 3.
and do not install batteries of different
types, charge levels, or capacities
together.
Wear ANSI-approved safety goggles 4.
and heavy-duty work gloves when
assembling and digging holes.
Store idle power tools out of c.
the reach of children and do not
allow persons unfamiliar with the
power tool or these instructions
to operate the power tool. Power
tools are dangerous in the hands of
untrained users.
Maintain power tools. Check d.
for misalignment or binding of
parts, breakage of parts and any
other condition that may affect
the power tool’s operation. If
damaged, have the power tool
repaired before use. Many
accidents are caused by poorly
maintained power tools.
Service4.
Have your power tool serviced by a.
a qualied repair person using
only identical replacement parts.
This will ensure that the safety of the
power tool is maintained.
Metal Detector Safety Warnings
Maintain labels and nameplates on 1.
the tool. These carry important safety
Consult local regulations before 5.
using detector, digging, or taking
any ndings. Obtain property
owner’s permission before detecting
on their property.
Only use and store in normal 6.
temperature environments.
Extremes in temperature can shorten
effectiveness of electronic devices
and melt or damage plastic parts.
Avoid electrical shock. 7. Any metal
detector may discover underground
power lines, explosives or other
items which when struck could
cause personal injury. Do not use
this product in areas where there
might be underground electric lines
or pipes buried at shallow depths.
Never search in military zones where
bombs or other explosives may be
buried. Avoid striking any line known
or suspected to be carrying electric
power. Do not search any pipeline,
particularly if it could contain a
ammable gas or liquid. In areas of
uncertain conditions, use reasonable
caution before using the Tool. If there
Page 3For technical questions, please call 1-800-444-3353.SKU 67378
Page 4
is any question about a condition
being safe of unsafe, do not operate
the Tool.
Keep the Metal Detector away from 8.
any lights, TVs, computers, and
moble telephones. These can all
cause electro-magnetic interference.
Only the Search Coil (23) and 9.
plastic section of the Lower
Leg (18) are water proof. Do not
immerse the unit any further into
water beyond the plastic section of
the Lower Leg.
Keep the Tool clean. 10. Wipe the
housing after each use. The search
coil is washable and can be fully
submerged. Never submerge the
control housing. Protect the control
housing from rain, blowing surf and
heavy mist. Disassemble the Leg
and wipe it clean after use in sandy
areas.
WARNING:14. This product contains
or, when used, produces a chemical
known to the State of California to
cause cancer and birth defects or
other reproductive harm. (California
Health & Safety Code § 25249.5, et
seq.)
The warnings, precautions, 15.
and instructions discussed in
this instruction manual cannot
cover all possible conditions and
situations that may occur. It must
be understood by the operator that
common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
SAVE THESE
INSTRUCTIONS.
Use the right tool for the job11. .
There are certain applications for
which this tool was designed. Do not
modify this tool and do not use this
tool for a purpose for which it was not
intended.
This product is not a toy. 12. Keep it
out of reach of children.
People with pacemakers should 13.
consult their physician(s) before
use. Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure. In addition,
people with pacemakers should:
• Avoid operating alone.
• Properly maintain and inspect to
avoid electrical shock.
Page 4 For technical questions, please call 1-800-444-3353. SKU 67378
Page 5
SPECIFICATIONS
Components & Controls
Electrical Input 6 AA Batteries (not included)
Earphone Jack 3.5 mm mini-jack Socket
Sensitivity Adjuster;
Metal-Type Discriminator;
All-Metal Indicator; Tone
Functions
Adjuster; Volume Control;
Target Locator; Low Battery
Indicator; Auto Ground
Balance; Mode Selector
UNPACKING
When unpacking, make sure the item
is intact and undamaged. If any parts
are missing or broken, call Harbor Freight
Tools at 1-800-444-3353.
INSTRUCTIONS FOR
PUTTING INTO USE
Earphone Jack
Arm Support (13)
Battery
Cover
(26)
Handle (8/10)
Control Box
View Meter (36)
Upper Leg (15)
Cable (25)
Lock Nut (20)
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Turn the Power Switch of the
tool off and remove the
batteries before assembling
or making any adjustments to
the tool.
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.
Lower Leg (18)
Coil Pivot (21)
Knob Bolt (22)
Search Coil (23)
Figure 1
Page 5For technical questions, please call 1-800-444-3353.SKU 67378
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OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
around the two Legs. Rotate the Nut
counterclockwise to lock the Legs.
To adjust the length of the Legs, turn 2.
the Lock Nut in a clockwise direction,
slide the Lower Leg to the desired
extension length and turn the Nut
counterclockwise to secure the Legs
together.
Tool Set Up
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Turn the Power Switch of the
tool off and remove the
batteries before adjusting tool
or installing accessories.
Lock Nut (20)
Threaded Insert (24)
Upper Leg (15)
Tapered Bushing (19)
Figure 2
Note: When adjusting the length of the
Metal Detector, be careful to keep
the plastic Tapered Bushing (19) in
place with the smaller end toward the
smaller end of the Lock Nut (20).
To attach the two legs, slide the 1.
Threaded Insert (24) over the end
of the Upper Leg (15), making sure
that the tabs inside the Insert lock
into the cut-outs at the end of the
leg. Insert the tapered end of the
Tapered Bushing (19) into the Lock
Nut (20) and lightly thread the Nut
over the Insert (24). Slide the Lower
Leg (18) into the Lock Nut. To take
the slack off the cord, rotate the
Lower Leg, enabling the cord to wind
To adjust the angle of the Search 3.
Coil, loosen the Coil Pivot (21) and
Knob Bolt (22) and tilt it. Position the
Search Coil so that it is parallel to
the ground when holding the unit by
the Handle with your arm in the Arm
Support (13).
If needed, re-adjust the length of the 4.
Metal Detector after adjusting the
position of the Search Coil.
Batteries
Make sure the On/Off/Volume control 1.
is set to OFF. Slide the Battery Cover
(26) off of the back of the Control
Box and insert six AA batteries (sold
separately), aligning polarities as
indicated. Replace the Battery Cover.
Note: Use only fresh batteries of the
required size and type. Do not mix
old and new batteries, different types
(standard, alkaline, or rechargeable),
or rechargeable batteries of different
capacities.
Always remove old or weak batteries.
Batteries can leak chemicals that can
destroy electric parts.
If you do not plan to use the detector
for a week or more, remove the
batteries.
Page 6 For technical questions, please call 1-800-444-3353. SKU 67378
Page 7
Dispose of spent batteries according
to your local, state and federal
regulations.
Target Button - It is used with ALL
METAL mode to pinpoint a target
object’s location.
Note: You can extend battery life by using
earphones, which require less power
than the built-in speaker.
Note: Replace batteries when the LOW
BATT light turns on in the View Meter
(36).
Headphones
Insert headphone (sold separately) 1.
jack into Earphone socket.
To protect your hearing, set the On/2.
Off/Volume Control to OFF before
using the earphones, then adjust the
level to the lowest setting before you
begin listening.
Do not listen at extremely high 3.
volume levels. Extended high volume
listening can lead to permanent
hearing loss.
Do not wear headphones while 4.
operating your detector near high-
traffc areas. Pay attention to trafc
safety.
Functions and Indicators
On/Off/Volume - Turns on power to the
unit and sets the sound level.
SENS - Sets the sensitivity level of the
unit. Zero setting is the lowest level
and 10 is the highest. For general
use, set the sensitivity to a higher
position. In a mineralized area, or
area with electrical interference, a
lower setting may be more effective.
DISC/TONE - Adjustment knob for metal
identication.
View Meter - Registers signal strength
when a metal is detected.
- DISC, ALL METAL, and TONE are
motion modes. You have to move the
Search Coil to nd your target object.
- Target Mode is for pinpointing the
location of the item when the item is
below the surface.
View
Meter
(36)
LOW
BATTERY
Indicator
Target
Button (6)
On/Off/
VOLUME
(34)
DISC/TONE
(35)
SENS
(33)
MODE
Switch (1)
Earphone Socket
(11)
Figure 3
MODE - Sets the unit to three modes:
DISC, ALL METAL and TONE.
Page 7For technical questions, please call 1-800-444-3353.SKU 67378
Page 8
Before Getting Started
Before beginning an outside search,
you must test the unit with samples of
metal. Use the following:
an iron nail•
a ve-cent coin (nickel)•
a one-cent penny (zinc coin, after •
1982)
a 25-cent silver quarter.•
Place the Metal Detector on a
wooden or plastic table with the
Search Coil face up. Make sure the
table is away from TVs, computers,
or any device that can cause
electromagnetic interference. See
Figure 4.
Figure 4
NOTE: Be sure to remove any
watches, rings, or other metal objects
on your ngers and hands.
Turn on the Metal Detector and
set the VOLUME dial to the middle
position. Set the MODE switch to the
middle (ALL METAL). See Figure 5.
Figure 5
Sweep the metal samples 2 to 3
inches or more above the center of
the Search Coil. The Metal Detector
will respond to each with a “DI” tone
and the pointer on the View Meter will
swing to the right.
NOTE: Be sure to move the samples,
as the Detector is in motion mode.
Otherwise the Detector will not
respond.
NOTE: Adjusting the SENS dial from
“0” to “10” will increase the Detector’s
sensitivity.
Use the DISC/TONE dial to search
for specic metals by having it not
detect (“differentiate”) other kinds of
metals.
DISC/TONE Knob
Nickel
Iron
Nickel/
Gold
Iron
Zinc
Copper
Aluminum/
Silver
100
Figure 6
For example, when the DISC/TONE
dial is set to “0” the Detector will
respond to ANY metal object with a
“DI” tone and the meter will swing to
the right.
Page 8 For technical questions, please call 1-800-444-3353. SKU 67378
Page 9
To adjust the settings to PREVENT 1.
the unit from detecting iron metals,
set the VOLUME and SENS dials at
midpoint.
Sweep the nickel in front of the
Search Coil; the unit will not respond
to the nickel or to the iron nail. But it
will respond the other samples.
Then set MODE switch to DISC 2.
and the DISC/TONE dial to about “9
o’clock.” See Figure 7.
As a test, sweep the iron nail sample 3.
2 to 3 inches above the search coil.
The unit will NOT respond (the meter
pointer won’t swing and the unit is
silent.) Sweeping the other samples
should produce the “DI” tone and
make the pointer move.
To have the unit differentiate 4. nickel
metals, set the DISC/TONE to about
“11 o’clock.” See Figure 8.
Figure 7
Figure 8
To prevent the 5. zinc penny from being
detected, set the DISC/TONE dial to
about “1 o’clock” See Figure 9.
By now, only the silver quarter should
be detected.
NOTE: The discrimination position of
aluminum is similar to silver. So both
metals will be detected at the same
time. The discrimination position of
gold is similar to the nickel setting.
The Metal Detector can also be
adjusted to detect all metals, yet
signal a specic metal differently from
the others.
Set the MODE switch to TONE and 6.
the VOLUME and SENS dials to their
halfway points.
Set the DISC/TONE dial to about “9 7.
o’clock” (the iron setting). Sweep
the nail 2-3 inches above the Search
Coil. The unit will make a short “KO”
sound and the meter will swing to
Figure 9
Page 9For technical questions, please call 1-800-444-3353.SKU 67378
Page 10
the right. Sweeping any of the other
samples will produce the “DI” sound.
use the TARGET button to determine
the location of the metal.
Rotate the DISC/TONE dial to mark 8.
the other specic metals with the
“KO” sound.
To use the Metal Detector to “target’
specic metals, set the MODE switch
to ALL METAL and the VOLUME and
SENS dials to the middle.
Press the red TARGET Button (6) 9.
on the panel. Set the silver quarter
about ve inches from the center of
the Search Coil. The unit will make a
continuous long tone and the meter
will swing to the right. See Figure 10.
Target
Button (6)
Figure 10
General Operating Instructions
Once all the proper tests and
adjustments have been made, the
Metal Detector is ready to be used
outdoors.
When rst searching, set the Mode 1.
button to ALL METAL and SENS to
the highest level.
Adjust the VOLUME to the desired 2.
level.
25¢
Figure 11
3. Sweep the Search Coil (23) slowly
back and forth in an arc, keeping it
about 1/2” to 2” from the ground. See
Figure 11, above.
If you hear a beeping noise or see 4.
Keeping the coin still, release the 10.
TARGET button. Wait two seconds,
then press down the TARGET button
again; the unit’s sensitivity will be
reduced.
NOTE: 11. Even though the coin’s
location has not changed, when the
unit’s sensitivity is reduced the Metal
Detector will stop sounding a tone.
Repeat the above operation, bringing 12.
the coin closer to the Detector
and making it sound a tone. Once
the needle jump to the right on the
View Meter), you have located a
metal object.
Use the TARGET button to pin-point 5.
the object. Then use the DISC or
TONE modes to determine what kind
of metal it is and whether you wish to
dig out the item.
To prevent accidents, turn off the tool 6.
and remove the batteries after use.
Clean, then store the tool indoors out
of children’s reach.
operating an outside search, you can
Page 10 For technical questions, please call 1-800-444-3353. SKU 67378
Page 11
Tips for Searching in Different
Environments
Move all metal digging tools when 5.
searching.
There are many factors which
inuence the sensitivity and accuracy
of detecting objects, including the
angle, depth, size and oxidation
of the target object. Various soil
or seawater conditions, and also
electromagnetic and electrical
interference surrounding the target
can also affect readings. Other metal
detectors in the area will also cause
interference, so when there is more
than one unit in use, be sure they are
at least 10 yards apart. Some ways to
help increase success are:
If there is interference from similar 1.
metal detectors in your searching
area, lower the SENS setting to stop
the interference.
If there is interference from electrical 2.
cables, TV, radio, or other electrical
devices in your searching area, lower
the SENS setting.
When searching in highly mineralized 3.
areas, the unit may sound even if
there is no metal. Lower the SENS
setting, set the DISC to high and
increase the distance of the Search
Coil from the ground until the false
signal disappears. To set the DISC
setting, place a test metal object
in highly mineralized earth or wet
sand and adjust the setting before
beginning.
When searching in a trash area, set 4.
the DISC to the middle setting so that
the unit can reject most invaluable
metals such as nails, bottle caps,
cans, and small pieces of iron.
The SENS level is generally opposite 6.
the DISC setting. The higher the
sensitivity level is, the worse the
discrimination will be. You can
lower the sensitivity to have better
discrimination.
MAINTENANCE AND
SERVICING
Procedures not specically
explained in this manual
must be performed only by a
qualied technician.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION: Turn the Power
Switch of the tool off and
remove the batteries from the
tool before performing any
inspection, maintenance, or
cleaning procedures.
Do not use damaged
equipment. Have the problem
corrected before further use.
Cleaning and Maintenance
BEFORE EACH USE,1. inspect the
general condition of the tool. Check
for loose hardware, misalignment or
binding of parts, cracked or broken
parts, damaged electrical wiring, and
any other condition that may affect its
safe operation.
Page 11For technical questions, please call 1-800-444-3353.SKU 67378
Page 12
Handle the Metal Detector gently and 2.
carefully. Dropping it can damage
circuit boards and the case, and can
cause the Detector to malfunction.
PARTS LIST
AFTER USE,3. wipe external surfaces
of the tool with a damp clean cloth,
then dry. Do not use harsh chemicals,
cleaning solvents, or strong
detergents to clean the detector.
Part Description Qty
1 Mode Switch 1
2 Control Dials 3
3 Console Cover 1
4 Meter Cover 1
5 Adhesive Sticker 1
6 Target Button 1
7 Switch 1
8 Handle Section (Right) 1
9 Nut 1
10 Handle Section (Left) 1
11 Headphone Socket 1
12 Nut 1
13 Arm Support 1
14 Arm Support Pad 1
15 Upper Leg 1
16 Bolt 1
17 Bolt 1
18 Lower Leg 1
Part Description Qty
19 Tapered Bushing 1
20 Lock Nut 1
21 Coil Pivot 1
22 Knob Bolt 1
23 Search Coil 1
24 Threaded Insert 1
25 Cable (not shown in diagram) 1
26 Battery Cover 1
27 Bolt 2
28 Bolt 2
29 Nut 1
30 Housing 1
31 Bolt 1
32 PCB 1
33 Sensitivity Potentiometer 1
34 On/Off/Volume Potentiometer 1
35 Tone Potentiometer 1
36 View Meter 1
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT
HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/
OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD
BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE
BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE
ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER
INSTALLATION OF REPLACEMENT PARTS THERETO.
Page 12 For technical questions, please call 1-800-444-3353. SKU 67378
Page 13
ASSEMBLY DIAGRAM
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not
available individually as replacement parts.
Page 13For technical questions, please call 1-800-444-3353.SKU 67378
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