P/N:110401109798X
Thick
Scan
Metal
Scan
UT387C
Stud
Sensor
Stud
Scan
AC
Scan
1
2
3
4
5
6
7
8
9
10
11
1. V groove
2. LED indication
3. High AC voltage hazard
4. Stud icon
5. Target indication bars
6. Metal icon
7. Mode selection
a. Stud Scan and Thick Scan: wood detection
b. Metal Scan: metal detection
c. AC Scan: live wire detection
8. Battery power
9. CENTER
10.Power switch
11.Battery compartment door
UT387C Stud Sensor User Manual
Caution:
Please read the manual carefully before use. Observe the safety regulations and the cautions in the
manual to make best use of the Stud Sensor. The company reserves the right to modify the manual.
UNI-T Stud sensor UT387C
Stud sensor UT387C application (Indoor dry wall)
UT387C is mainly used to detect the wood stud, metal stud, and live AC wires behind dry wall.
Caution: The detection depth and accuracy of UT387C are easily affected by factors such as the ambient
temperature and humidity, the texture of the wall, the density of the wall, the moisture content of the wall,
the humidity of the stud, the width of the stud, and the curvature of the stud edge, etc. Do not use this
detector in strong electromagnetic/magnetic fields, such as, electric fan, motor, high-power devices, etc.
UT387C can scan the following materials:
Dry wall, plywood, hardwood flooring, coated wood wall, wallpaper.
UT387C cannot scan the following materials:
Carpets, tiles, metal walls, cement wall.
Specification
Test condition:
temperature: 20°C
25°C; humidity: 35
55%
～
～
Battery:
9V square carbon-zinc or alkaline battery
StudScan Mode:
19mm (maximum depth)
ThickScan Mode:
28.5mm (maximum detection depth)
Live AC Wires (120V 60Hz/220V 50Hz):
50mm (max)
Metal detection depth:
76mm (Galvanized steel pipe: Max.76mm. Rebar: maximum 76mm. Copper
pipe: maximum 38mm.)
Low battery
:
If the battery voltage is too low when power on, the battery icon will flash, the
indication
battery needs to be replaced.
Operating temperature:
-7°C
49°C
～
Storage temperature:
-20°C
66°C
～
Waterproof:
No
Figure 1
Operating Steps
1. Installing the battery:
As shown in the figure, open the battery compartment door,
insert a 9V battery, there are positive and negative terminal
marks in the battery jar. Do not force the battery if battery
installation is not in place. Close the door after installing
correctly.
Battery door
Figure 2
2. Detecting wood stud and live wire:
1) Grip the UT387C at the handheld areas, position it straight up
and down and flat against the wall.
Note 1
: Avoid griping over the finger stop, hold the device parallel to the studs. Keep the device flat
against the surface, do not press it hard and do not rock and tilt. When moving the detector, holding
position must stay unchanged, or else the detection result will be affected.
Note 2
: Move the detector flat against the wall, the moving speed shall stay constant, otherwise the
detection result may be inaccurate.
2) Selecting the detection mode: move switch to left for StudScan (Figure 3) and right for ThickScan
(Figure 4).
Note:
Select the detection mode according to different wall thickness. For example, select StudScan
mode when the thickness of the dry wall is less than 20mm, select ThickScan mode when it is greater
than 20mm.
Figure 3
Figure 4
3) Calibration:
Press and hold the power button, the device will calibrate automatically. (If the battery icon keeps
flashing, it indicates low battery power, replace the battery and power on to redo the calibration).
During the auto calibration process, LCD will display all icons (StudScan, ThickScan, Battery power
icon, Metal, Target indication bars) until the calibration is completed. If the calibration is successful,
the green LED will flash once and the buzzer will beep once, which indicates that user can move the
device to detect woods.
Note 1: Before powering on, positon the device on wall in place.
Note 2: Do not lift up the device from the dry wall after the calibration is completed. Recalibrate if the
device is lifted from the dry wall.
Note 3: During calibration, keep the device flat against the surface, do not rock or tilt. Do not touch
the wall surface, otherwise the calibration data will be affected.
4) Continue to hold the power button, then slowly slide the device to scan on the wall. As it approaches
the midpoint of the wood, the green LED lights up and the buzzer beeps, the target indication bar is
full and the icon “CENTER” is displayed.
