1. Introduction
The ARTBULL Infrared Laser Rangefinder is a versatile digital distance meter designed for accurate and efficient measurements. It offers various measurement modes including single distance, area, volume, and indirect measurements using the Pythagorean theorem. This manual provides detailed instructions for the safe and effective use of your device.

ARTBULL Laser Rangefinder models R-50 (50m) and R-100 (100m).
2. Safety Information
This device uses a Class 2 laser (<1mW, 620-690nm). Please observe the following safety precautions:
- Do not stare directly into the laser beam.
- Do not aim the laser beam at people or animals.
- Avoid direct eye exposure to the laser beam.
- Keep the device out of reach of children.
- Use only as described in this manual.
3. Package Contents
Upon opening your ARTBULL Infrared Laser Rangefinder package, you should find the following items:
- ARTBULL Laser Distance Meter (R-50 or R-100 model)
- Carrying Pouch
- User Manual
- Reflective Plate
- Wrist Strap

Included items in the ARTBULL Laser Rangefinder package.
4. Product Overview
Familiarize yourself with the components and controls of your laser rangefinder:

Product structure with labeled buttons and display screen.
- Display Screen: Shows measurement results, modes, and battery status.
- Power Key / Measuring Key (Red Triangle): Turns the device on/off and initiates measurements.
- Reference Switch Key / Plus Key (+): Switches measurement reference point (front/rear) and adds measurements.
- Minus Key / Unit Switch Key (U): Subtracts measurements and switches measurement units (m, ft, in).
- Function Key / Sound Key (Box Icon): Switches between different measurement modes (single, area, volume, Pythagorean, etc.) and controls sound.
- Clear Key / OFF Key (C): Clears current measurement or turns off the device.
5. Setup
5.1 Battery Installation
The ARTBULL Laser Rangefinder requires two AA (Alkaline) 1.5V batteries (not included). To install:
- Locate the battery compartment cover on the back of the device.
- Slide or open the cover.
- Insert two AA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
6. Operating Instructions
6.1 Power On/Off
- Power On: Press the Power Key / Measuring Key (Red Triangle) to turn on the device.
- Power Off: Press and hold the Clear Key / OFF Key (C) to shut down. The device will also automatically shut down after 120 seconds of inactivity, and the laser will turn off after 30 seconds of inactivity.
6.2 Unit Conversion
To switch between measurement units (meters, feet, inches):
- Long press the Minus Key / Unit Switch Key (U). The display will cycle through m, ft, and in. Release the button when your desired unit is shown.
6.3 Measurement Modes
Press the Function Key / Sound Key (Box Icon) to cycle through the available measurement modes:

Available measurement functions.
- Single Measurement: Measures the direct distance between two points.
- Max/Min Measurement: Continuously measures and displays the maximum and minimum distances.
- Continuous Measurement: Provides real-time distance updates as you move the device.
- Area Measurement: Measures length and width to calculate area.
- Volume Measurement: Measures length, width, and height to calculate volume.
- Pythagorean Measurement: Uses the Pythagorean theorem for indirect height or distance measurements.
- Height Difference (Pythagoras): Calculates height difference using two or three indirect measurements.
6.4 Measurement Reference Point
The device can measure from its front or rear edge. To switch the reference point:
- Long press the Reference Switch Key / Plus Key (+). The display will indicate whether the measurement is taken from the front or rear of the device.
6.5 Basic Functions Summary

Summary of basic functions.
6.6 Operational Demonstration Video
This video demonstrates how to power on, switch measurement units, change measurement modes, adjust the measurement reference point, and power off the device.
7. Maintenance
- Clean the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Keep the laser lens clean and free from dust or debris to ensure accurate measurements.
- Remove batteries if the device will not be used for an extended period to prevent leakage.
- Store the device in a dry, cool place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
- Device does not power on: Check battery installation and ensure batteries are not depleted. Replace if necessary.
- Inaccurate measurements: Ensure the laser lens is clean. Verify the measurement reference point is correctly set. Avoid measuring through transparent surfaces or highly reflective materials.
- Laser range is shorter than expected: Direct sunlight can significantly weaken the laser, reducing the effective measurement range. The stated range is typically for indoor use. For outdoor measurements, especially in bright conditions, the range may be reduced.
- Error Message on Display: Refer to the user manual for specific error codes and their meanings.
- Device shuts off unexpectedly: The device has an automatic shutdown feature (laser after 30s, instrument after 120s of inactivity) to conserve battery. If it shuts off more frequently, check battery levels.
9. Specifications

Technical specifications of the ARTBULL Laser Rangefinder.
| Feature | Detail |
|---|---|
| Measuring Range | 0.05m ~ 50m (R-50), 0.05m ~ 100m (R-100) |
| Measuring Accuracy (Standard Deviation) | ±2.0mm |
| Distance Unit | m, ft, in |
| Area Unit | m², ft², in² |
| Volume Unit | m³, ft³, in³ |
| Laser Type | 620~690nm |
| Laser Class | Class II. (<1mW) |
| Single Measurement Time | 0.5s |
| Operating Temperature | -10~+40°C |
| Storage Temperature | -20~+65°C |
| Batteries | AA(Alkaline) 2×1.5V (Not included) |
| Working time (Fully charged) | > 5000 Times |
| Weight (Without batteries) | 150 g |
| Dimension (L*W*H) | 115mm x 45mm x 28mm |
| Certifications | CE, FCC |
| Origin | Mainland China |
10. User Tips
- Outdoor Use: When using the rangefinder outdoors, especially in bright sunlight, the laser beam may be less visible and the effective measurement range can be significantly reduced. For optimal performance, use indoors or in shaded areas.
- Indirect Height Measurement: If you need to measure height indirectly (e.g., a wall where you can't aim directly at the top), utilize the Pythagorean measurement modes. This allows you to calculate height from two or three distance measurements.
- Surface Considerations: For best accuracy, measure to solid, non-reflective surfaces. Using the included reflective plate can improve accuracy over long distances or on difficult surfaces.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official ARTBULL website. Keep your purchase receipt as proof of purchase.





