1. Product Overview
The Noyafa Digital Inclinometer, available in models NF-566 and NF-566S, is a high-precision instrument designed for accurate angle and slope measurements. It features a robust aluminum alloy frame, a clear VA screen with backlight, and strong magnets for versatile attachment. The NF-566S model includes additional features such as bi-directional laser scanning and a built-in rechargeable lithium battery.


2. Key Features
- High Precision: Measurement accuracy of ±0.2° with a display resolution of ±0.05°.
- Multiple Measurement Units: Switchable units including degrees (°), percentage (%), inches per foot (in/ft), and millimeters per meter (mm/m).
- Absolute/Relative Measurement: Easily switch between absolute and relative measurement modes.
- Data Lock: Hold function to lock the current measurement data for easy reading.
- Automatic Power Off: Device automatically powers off after 5 minutes of no operation to conserve battery.
- Backlight Function: VA screen with backlight for clear visibility in various lighting conditions.
- Strong Magnetic Base: Five sides of the inclinometer feature strong built-in magnets for secure attachment to metallic surfaces.
- Durable Construction: Sturdy aluminum alloy frame provides wear-resistant, anti-drop, and anti-shock protection.
- Laser Function (NF-566S only): Bi-directional laser scanning for horizontal marking.
- Power Supply: NF-566 uses 2 AAA batteries; NF-566S uses a built-in 3.7V 390mAh lithium battery with Type-C USB charging.


3. Setup and Power
3.1 Battery Installation (NF-566)
- Locate the battery compartment on the device.
- Open the battery cover.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
3.2 Charging (NF-566S)
- Connect the inclinometer to a USB power source using a Type-C USB cable.
- The device will indicate charging status on the display.
- A full charge typically takes a few hours.
3.3 Power On/Off
Press the OFF button to turn the device on. To turn off, press and hold the OFF button for a few seconds, or the device will automatically power off after 5 minutes of inactivity.

4. Operating Instructions
4.1 Basic Measurement
- Turn on the inclinometer by pressing the OFF button.
- Place the inclinometer on the surface you wish to measure. The display will show the angle or slope.
- The screen supports automatic flipping for easy viewing of data, regardless of the device's orientation.

4.2 Unit Switching
Press the HOLD UNITS button to cycle through the available measurement units: degrees (°), percentage (%), inches per foot (in/ft), and millimeters per meter (mm/m).

4.3 Absolute/Relative Measurement Mode
The device defaults to absolute measurement mode. To switch to relative measurement mode (setting the current value to 0), short press the REF CAL button. Short press it again to exit relative mode and return to absolute measurement.

4.4 Data Lock
To lock the current measurement data on the display, short press the HOLD UNITS button. Press it again to unlock and resume live measurement.
4.5 Laser Function (NF-566S only)
For the NF-566S model, short press the OFF button to activate the left laser. Press OFF again to activate the right laser. A third short press will activate both lasers simultaneously. This feature is useful for bilateral horizontal laser marking.

4.6 Video Demonstration
Watch this video for a visual guide on how to use the Digital Inclinometer NF-566/NF-566S, demonstrating absolute and relative measurement modes, magnetic attachment, and ramp measurement.
5. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, store the inclinometer in a dry, cool place.
- Battery Care: For the NF-566, remove AAA batteries if the device will not be used for a long time to prevent leakage and damage. For the NF-566S, ensure the built-in lithium battery is charged periodically if stored for long durations.
- Avoid Impact: Although designed to be anti-shock, avoid dropping or subjecting the device to strong impacts to maintain its precision.
6. Troubleshooting
6.1 Display Not Turning On
- NF-566: Check if the AAA batteries are correctly installed and have sufficient charge. Replace if necessary.
- NF-566S: Ensure the built-in lithium battery is charged. Connect to a Type-C USB charger.
6.2 Inaccurate Readings
- Ensure the measurement surface is clean and free of debris.
- Verify the inclinometer is placed firmly and stably on the surface.
- If using relative measurement, ensure the reference point was set correctly.
- Perform a calibration if available (refer to specific model instructions if a calibration procedure is detailed).
6.3 Laser Not Working (NF-566S only)
- Ensure the device is powered on and the battery is charged.
- Press the OFF button to cycle through laser activation modes (left, right, both).
6.4 Low Battery Reminder
If the low-electricity reminder is displayed, replace the AAA batteries (NF-566) or recharge the lithium battery (NF-566S) promptly.
7. Specifications

| Parameter | NF-566 (Digital Inclinometer) | NF-566S (Digital Display Laser Inclinometer) |
|---|---|---|
| Brand Name | NOYAFA | |
| Model Number | NF-566/NF-566S | |
| Origin | Mainland China | |
| Certification | CE | |
| Dimension (LxWxD) | 60x60x30mm | |
| Measuring Range | 4*90° | |
| Accuracy | ±0.2° | |
| Resolution | 0.05° | |
| Measurement | Zero point measurement with reference to the horizontal plane | |
| Magnetic force seat | Five sides are magnetic | |
| Type of sensor | Six axis sensor | |
| Power supply | 2 AAA batteries | 3.7V 390mAh lithium battery |
| Ambient temperature | 0°C ~ 50°C (controller only) | |
| User interface | VA screen with backlight | |
| Laser scanning | No laser scanning | Bidirectional laser scanning |
| Outer frame material | Aluminum alloy | |
| Relative/absolute Angle measurement | Yes | |
| Data lock | Yes | |
| Low battery reminder | Yes | |
| Automatic shutdown | 5 min | |
8. User Tips
- Screen Orientation: The display automatically flips to ensure readability regardless of how the inclinometer is held, even when rotating horizontally with the screen facing upwards.
- Stable Placement: For the most accurate readings, ensure the inclinometer is placed firmly and without wobble on the surface being measured.
- Reference Point: When using the relative measurement mode, remember to set your desired reference point (zero) carefully before taking subsequent measurements.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.