HANMATEK SF3 6-in-1 Multi-Function Wall Scanner and Stud Finder

Model: SF3

Introduction

The HANMATEK SF3 is a versatile 6-in-1 wall scanner designed to accurately detect various hidden objects behind walls, floors, and ceilings. This device helps users locate wood studs, ferrous and non-ferrous metals, and live AC wires, enhancing safety and precision for DIY projects and professional tasks.

Safety Information

Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.

Always assume live AC wires are present in the wall. Exercise extreme caution when drilling, cutting, or opening walls, floors, or ceilings.
Do not rely solely on the detector to locate items behind surfaces. Use other information sources such as blueprints, visible wiring, and plumbing access points.
Keep the device dry and clean. Avoid exposure to moisture or extreme temperatures.
Do not attempt to open or modify the device. There are no user-serviceable parts inside.
Dispose of batteries properly according to local regulations.

Product Overview

The HANMATEK SF3 features an intuitive design with a clear LCD display and multiple detection modes.

Figure 1: Device Components
1. Red Indicator Light (Warning)
2. Yellow Indicator Light (Edge/Signal)
3. Green Indicator Light (Center/OK)
4. Screen
5. Foreign Object Detection Button (Stud Mode, long press to switch between Exact/Deep)
6. On/Off Button
7. Flashlight and Sound Button (short press to toggle sound/mute)
8. Metal/Wire Detection Mode Button
9. Sensor Area (on back)
10. Battery Cover (on back)

Key Features:

6-in-1 Multi-function Detection: Detects wood studs, ferrous and non-ferrous metals, live AC wiring, and beams.
Dual Wood Detection Modes: Precision Mode (up to 20 mm depth) and Deep Mode (up to 38 mm depth) for accurate stud detection.
Reliable Metal Detection: Identifies ferrous metals up to 38 mm deep and non-ferrous metals up to 20 mm deep.
AC Wire Detection: Displays unshielded live wires up to 38 mm deep in all modes for enhanced safety.
Digital LCD Display & Audio Alarm: Provides clear visual and audible indications of detected objects.
Integrated Flashlight: Aids in scanning in dimly lit areas.

Setup

1. Battery Installation

The HANMATEK SF3 requires 3x 1.5V AAA alkaline batteries. Open the battery cover on the back of the device and insert the batteries, ensuring correct polarity. Close the battery cover securely.

2. Initial Calibration

Before each use, or if the device is accidentally shaken or lifted during scanning, recalibration is necessary for accurate readings.

Place the device flat against the wall where you intend to scan, ensuring no objects are directly beneath the sensor area.
Press and hold the On/Off button to power on the device.
The device will automatically calibrate. Wait for 1-3 seconds until the calibration is complete.

Figure 2: Powering On and Mode Selection
Press the power button to turn on the tool, then press the mode button to switch to the desired mode.

Operating Modes

The SF3 offers multiple detection modes for various materials. Select the appropriate mode using the mode buttons on the device.

1. Stud Scan Mode

This mode is used to detect the edges and center of wood studs behind drywall. It has two sub-modes:

Exact Mode: Detects studs up to 20 mm (0.79 inches) deep. Recommended for initial scans.
Deep Mode: Detects studs up to 38 mm (1.50 inches) deep. Use if no studs are found in Exact Mode. To switch, long press the stud detection button.

Figure 3: Stud Mode Detection
The device indicates the edge and center of a stud. Always start scanning in Exact Mode to minimize false detections.

2. Metal Scan Mode

This mode detects ferrous metals (like rebar) and non-ferrous metals (like copper pipes) behind surfaces.

Ferrous Metal: Detects up to 38 mm (1.50 inches) deep.
Non-ferrous Metal: Detects up to 20 mm (0.79 inches) deep.

Figure 4: Metal Mode Detection
The device distinguishes between ferrous and non-ferrous metals. Always start scanning in Precision mode first.

3. AC Wire Scan Mode

This mode is specifically for detecting live, unshielded AC wires up to 38 mm (1.50 inches) deep. For safety, the device will always detect and display live AC wires in all modes.

Figure 5: AC Wire Detection
When unshielded live wires are detected, a wire warning icon will flash on the screen, and an audible alert will sound.

General Scanning Procedure:

Step 1: Power On and Select Mode. Press the power button to turn on the tool. Press the mode button to switch to the desired detection mode (Stud, Metal, or AC Wire).
Step 2: Scan Slowly. Place the scanner flat against the wall and move it slowly along the surface. Do not lift or apply excessive pressure to the device. If the device is accidentally shaken or lifted, recalibrate it.

Figure 6: Slow and Steady Scan
Move the scanner slowly and consistently across the surface for accurate detection.

Step 3: Interpret Display and Audio. The progress bar on the screen will change based on the distance to the detected object. When the signal is strong (full bars), the indicator light will flash, and a clicking sound will be heard, indicating the center of the object has been found.

Figure 7: Interpreting the Display
The LCD shows signal strength and object location. Audio alerts provide additional feedback.

Official Product Videos

Watch these videos for a visual guide on using your HANMATEK SF3 wall scanner.

HANMATEK SF3 Stud Finder Demonstration

This video demonstrates the key features and operation of the HANMATEK SF3 stud finder, including its 4-in-1 detection capabilities.

General Stud Finder Usage (SF1 Model)

This video provides a general overview of how to use a HANMATEK stud finder (SF1 model) for detecting objects behind walls. While it features the SF1, the basic operational principles are similar to the SF3.

Specifications

Feature	Detail
Brand	HANMATEK
Model Number	SF3
Color	Green
Power Source	Battery Powered (3x AAA required)
Product Dimensions (L x W x H)	5 x 7 x 8 cm
Display Type	Liquid Crystal Display (LCD)
Max Stud Detection Depth (Exact)	20 mm (0.79 inches)
Max Stud Detection Depth (Deep)	38 mm (1.50 inches)
Max Ferrous Metal Detection Depth	38 mm (1.50 inches)
Max Non-Ferrous Metal Detection Depth	20 mm (0.79 inches)
Max AC Wire Detection Depth	38 mm (1.50 inches)

Maintenance

Clean the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Store the device in a dry, dust-free environment when not in use.
Remove batteries if the device will not be used for an extended period to prevent leakage.

Troubleshooting

Inaccurate Readings: Ensure the device is properly calibrated before each scan. Move the device slowly and consistently. Avoid scanning over wet or freshly painted surfaces.
No Detection: Check battery levels. Ensure the correct mode is selected for the material you are trying to detect.
False Positives: This can occur due to moisture, dense materials, or other environmental factors. Try scanning in a different area or recalibrating.

Warranty and Support

For warranty information and technical support, please refer to the contact details provided with your purchase or visit the official HANMATEK website. Keep your proof of purchase for warranty claims.

Package Contents

Your HANMATEK SF3 package includes the following items:

Figure 8: Package Contents

1x HANMATEK SF3 Stud Detector
3x 1.5V AAA Alkaline Batteries
1x Multi-language Instruction Manual
1x Storage Bag

HANMATEK SF3