1. Introduction
Thank you for choosing the Farway T50 Digital Laser Distance Meter. This device is designed for precise and rapid distance, area, and volume measurements, offering various functions for both professional and DIY applications. Please read this manual carefully before using the device to ensure safe and correct operation.
2. Safety Information
This device emits a Class II laser. 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.
- Do not disassemble or modify the device. Repairs should only be performed by authorized service personnel.
- Keep the device out of reach of children.
- Use the device only for its intended purpose as described in this manual.
Laser Class II Product: Output < 1mW at 635nm.
3. Product Overview
The Farway T50 is a compact and robust laser distance meter featuring a backlit LCD and multiple measurement functions.

Figure 3.1: Farway T50 Digital Laser Distance Meter. This image displays the main unit, two AAA batteries, and a small user manual, illustrating the complete package contents.
3.1 Device Components
- Laser Emission Aperture: Where the laser beam exits.
- Laser Receiving Lens: Detects the reflected laser beam.
- Display Screen: Backlit LCD for showing measurements and settings.
- Keypad: Buttons for various functions and operations.
- Bubble Level: For horizontal alignment.
- Battery Compartment: Located at the rear for AAA batteries.
- Wrist Strap Eyelet: For attaching the included wrist strap.
3.2 Display Screen

Figure 3.2: Backlit LCD Screen and Unit Switching. This image demonstrates the device's backlit display, showing measurement results in meters, inches, and feet, highlighting the unit switching capability.
The backlit LCD provides clear visibility in various lighting conditions. It displays measurement results, unit indicators, battery status, measurement mode icons, and historical data.
4. Setup
4.1 Battery Installation
The Farway T50 requires two AAA batteries (included). To install:
- Open the battery compartment cover on the back of the device.
- Insert the two AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
The device will automatically turn off after 180 seconds of inactivity to conserve battery life.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press the DIST button once to turn on the device and activate the laser.
- Power Off: Press and hold the CLEAR/OFF button for 2 seconds to turn off the device.
5.2 Unit Switching
To switch between measurement units (meters, inches, feet):
- Press and hold the UNITS button for 2 seconds. The unit will cycle through M (meters), In (inches), and Ft (feet).
5.3 Measurement Reference Point
The device can measure from the front or rear edge. To switch the reference point:
- Press the UNITS button briefly. An icon on the display will indicate the current reference point (front or rear).
5.4 Basic Distance Measurement
- Turn on the device by pressing DIST.
- Aim the laser at the target point.
- Press DIST again to take a measurement. The result will be displayed on the screen.
5.5 Continuous Measurement (Tracking)
This mode allows for dynamic measurement, displaying the maximum and minimum distances as you move the device.

Figure 5.1: Continuous Measurement. This image illustrates the device in continuous measurement mode, displaying both maximum and minimum distance values as the user sweeps the laser across a surface.
- Press and hold the DIST button for 2 seconds. The device will enter continuous measurement mode.
- Move the device slowly. The display will show the current distance, along with the maximum and minimum distances recorded during the session.
- Press DIST again to stop continuous measurement.
5.6 Multiple Measurement Modes
The Farway T50 supports various measurement functions, including single distance, continuous, area, volume, and Pythagorean modes.

Figure 5.2: Six Measurement Functions. This diagram visually explains the six different measurement capabilities of the Farway T50: single distance, 2-point Pythagorean, 3-point Pythagorean, continuous measurement, area calculation, and volume calculation.

Figure 5.3: Multiple Measurement Modes and Applications. This image displays icons for continuous measurement, direct angle measurement, area measurement, volume measurement, Pythagorean measurement, addition/subtraction, auto level, and auto height, along with examples of applications in layout, indoor spaces, tunnels, and warehouses.
To select a measurement mode, press the FUNC button repeatedly until the desired mode icon appears on the display.
5.6.1 Area Measurement
- Select the Area measurement mode.
- Measure the length by pressing DIST.
- Measure the width by pressing DIST. The device will automatically calculate and display the area.
5.6.2 Volume Measurement
- Select the Volume measurement mode.
- Measure the length, width, and height sequentially by pressing DIST after each measurement. The device will automatically calculate and display the volume.
5.6.3 Pythagorean Measurement (Indirect Measurement)
The device offers 2-point and 3-point Pythagorean modes for indirect height or distance measurements.
- Select the desired Pythagorean mode. The display will show which segments need to be measured.
- Follow the on-screen prompts to measure the required distances (e.g., hypotenuse, base).
- The device will calculate and display the unknown side.
5.7 Addition and Subtraction
To add or subtract measurements:
- Take the first measurement.
- Press the +/- button. A '+' or '-' symbol will appear.
- Take the second measurement. The result of the addition or subtraction will be displayed.
5.8 Data Storage and Recall
The device can store up to 50 groups of measurement data.

Figure 5.4: Reviewing Last Measurements. This image shows the Farway T50 display screen with a list of previous measurements, indicating the device's data storage and recall capability.
- Measurements are automatically saved.
- To recall stored data, press the MEM button. Use the arrow buttons to navigate through the stored measurements.
- To clear the current display, press the CLEAR/OFF button once.
5.9 Mute Function
To turn the measurement beep sound on or off:
- Press the MUTE button (often integrated with another function button, refer to device markings).
6. Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents. Clean the laser lens carefully with a soft cloth, similar to cleaning camera lenses.
- Storage: Store the device in a dry, cool place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display. Dispose of used batteries responsibly.
- Water and Dust Resistance: The device has an IP54 rating, meaning it is protected against dust ingress and splashing water from any direction. However, it is not fully waterproof and should not be submerged.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Low or dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| Inaccurate measurements | Laser lens dirty; Unstable measurement surface; Extreme temperature changes; Incorrect reference point | Clean lens; Ensure stable position; Allow device to acclimate; Check reference point setting |
| Laser not visible | Bright ambient light; Laser not activated | Measure in lower light conditions; Press DIST to activate laser |
| Error message on display | Measurement out of range; Signal too weak/strong | Ensure target is within range (1.5in-165ft); Measure on a reflective surface; Avoid strong light sources |
8. Specifications

Figure 8.1: Key Specifications. This infographic highlights the Farway T50's measuring range (1.5 inches to 165 feet), accuracy (±1/8 inch / ±2mm), 3-mode unit switching, 180-second auto-off feature, and AAA battery requirement.
| Feature | Specification |
|---|---|
| Measuring Range | 1.5 inches - 165 feet (0.05m - 50m) |
| Accuracy | ±1/16 inch (±2mm) |
| Units of Measurement | Meters (M), Inches (In), Feet (Ft) |
| Laser Class | Class II, < 1mW |
| Automatic Laser Off | 30 seconds |
| Automatic Instrument Off | 180 seconds |
| Data Storage | 50 groups |
| Battery Type | 2 x AAA Alkaline batteries (included) |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
| Protection Rating | IP54 (Dust-proof, Splash-proof) |
| Dimensions | 15.01 x 9.7 x 3.4 cm |
| Weight | 100 g (without batteries) |
| Material | Plastic |
| Manufacturer | Shenzhen Dobiy Electronic Co., Ltd. |
9. Warranty and Support
Farway products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the documentation included with your purchase or contact the retailer where the product was acquired. Please retain your proof of purchase for warranty claims.