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User Manual
• Marking Channel
• Live Wire Warning LED
• LCD Display
• Activation Button
• STUD or METAL/
• AC Mode Selection
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• METAL SCAN Mode
• AC TRACKING Mode
• Live Wire Detected
• STUD Mode
• Stud Location Graphic
• Low Battery Indicator
• Self-Calibration Complete
Stanley Stud Sensor 300
The Stud Sensor 300 uses electronic signals to locate the center of studs, joists or live AC wires through drywall
or other common building materials. Once the center of a stud has been detected in one pass across the
surface, the Stud Sensor 300 gives a visual display and sounds an audible tone. A marking channel allows you
to easily note the stud center and edges on the wall.
The Stud Sensor 300 will not detect objects in concrete, mortar, block or brick work, carpeting, foil faced
materials, metallic surfaces or ceramic tiles. The Stud Sensor 300 is not designed to locate non-ferrous or plastic
objects such as pipes.
Note: Read all instructions prior to operating the Stud Sensor 300 and DO NOT remove any labels from the
tool.
WARNING:
Protect Your Eyes, Wear Safety Goggles.
OPERATING INSTRUCTIONS
Battery
1
Open door on back of unit and connect a 9 volt Alkaline Type 6LR61 battery (not included) to clip. Put
battery back into case and close back battery door.
Note: Recommend to replace a new 9 volt battery when low battery - "Low Battery" will appear on the LCD.
Usage
Detecting Wood / Metal Studs
2
Hold the Stud Sensor 300 fl at against the surface, making fi rm contact.
3
Press in and hold the activation button. A series of tones will sound.
Note: The unit cannot be moved before calibration is complete.
4
When the unit is calibrated the "Ready" icon will appear on the LCD.
5
Keep holding the activation button during all of the following procedures.
• If all segments of the LCD fl ash on and off when the activation button is pressed, move the Stud Sensor
300 to a different location and try again. Releasing the activation button will turn off the sensor.
Note: Once the Activation button is released, the unit shuts off.
Note: While calibrating, the Stud Sensor 300 must not be placed directly over a stud, dense material such as
metal, or over a wet or newly painted area, or it will not properly calibrate.
6
Slide the Stud Sensor 300 slowly across the surface in a straight line. As it detects a stud, the unit will
display the relative position of the stud on the screen.
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When it detects the stud center, the "Center" icon will appear on the LCD and an audible tone will
sound. Use the marking channel located at the top of the unit to mark the stud center.
Detecting Live AC Wires
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The live wire red LED will illuminate, the "AC" icon will appear on the LCD, and the Stud Sensor 300 sounds
an audible tone, warning when in the proximity (typically within 10cm - 46cm along the surface) from a live
wire.
Note: Static electrical charges that can develop on drywall and other surfaces will spread the voltage detection
area many inches on each side of the actual electrical wire. To aid in locating the wire position, scan holding the
unit ½" away from the wall surface or place your other hand on the surface approximately 30cm from sensor.
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