5
E
Contents
• Stud Sensor Information
• User Safety
• Battery Safety
• Installing AAA Batteries
• Using the Stud Sensor
• Maintenance
• Troubleshooting
• Service and Repairs
• Warranty
• Specications
Stud Sensor Information
The Stud Sensor STHT77587/STHT77588 uses electronic 
signals to locate the center of wood or metal studs, or live AC 
wires through drywall or other common building materials.
PLEASE NOTE:
•  The stud sensor will not detect objects in concrete, mortar, 
block, brick work, plaster, carpeting, foil- faced materials, 
metallic surfaces, or ceramic tile.
•  The stud sensor is not designed to locate non-ferrous or 
plastic objects, such as pipes.
Once the center of a wood or metal stud has been detected 
in one pass across the surface, the Stud Sensor STHT77587/
STHT77588 turns on an LED and sounds an audible tone. 
A marking hole allows you to easily note the stud center
User Safety
Safety Guidelines 
The denitions below describe the level of severity for each 
signal word. Please read the manual and pay attention to these 
symbols.
 WARNING: Indicates a potentially hazardous 
situation which, if not avoided, could result in serious 
injury.
 CAUTION: Indicates a potentially hazardous situation 
which, if not avoided, may result in minor or moderate 
injury.
NOTICE: Indicates a practice not related to personal injury 
which, if not avoided, may result in property damage.
If you have any questions or comments about this or any 
STANLEY
®
 tool, go to http://www.STANLEYTOOLS.com.
WARNING:
Read and understand all instructions. Failure to 
follow the warnings and instructions in this manual 
may result in serious personal injury.
SAVE THESE INSTRUCTIONS
WARNING:
The following label information can be found on your 
tool for your safety.
AAA
Made in China
AAA
Made in China
CAUTION:
Protect your eyes. Wear safety goggles.
WARNING:
This tool is not a measuring device and should 
not be used as a substitute for a voltmeter.
WARNING:
The LED or Live Wire Detection symbol on the 
display is just an indicator and in some situations 
the voltage detection option may not accurately 
indicate the presence of voltage in a wall in the 
event of internal device failure or improper operation, 
and therefore should not be solely relied upon for 
identication of the presence of hazardous voltages. 
Other evidence, such as construction blueprints or 
visual identication of wiring or conduit entry points 
should also be utilized.
Always follow proper safety practices and use 
a separate detection method to verify a de-energized 
condition prior to commencing work.