Bosch Laser Measure GLM 20: A Simple Tool for Fast, Accurate Measuring
The Bosch GLM 20 laser measure is a compact, easy-to-use alternative to a traditional tape measure. Designed for straightforward distance measurements, it can help with home projects, room layouts, furniture planning, and quick measurements on the job. Its one-button operation makes it especially appealing to people who want a simple tool without complicated menus or settings.
What Is the Bosch GLM 20?
The Bosch GLM 20 is a handheld laser distance measurer with a measuring range of up to 65 feet (20 meters). It sends a laser to a target surface and calculates the distance based on the reflected signal. Bosch lists its measuring accuracy at approximately ±1/8 inch (±3 mm), making it useful for many everyday measuring tasks.
Unlike more advanced laser measures, the GLM 20 focuses on measuring distance rather than offering a broad set of calculation features. Its straightforward design helps keep operation quick and uncomplicated.
Key Features
- Measuring range: Up to 65 feet (20 meters)
- Accuracy: Approximately ±1/8 inch (±3 mm)
- Simple operation: A single-button design keeps measurements easy to take
- Continuous measurement: Track changing distances as you move the device
- Compact size: Easy to carry in a pocket, tool bag, or drawer
- Digital display: Shows measurement results clearly, including in dimmer conditions
How to Use the GLM 20
To take a measurement, position the GLM 20 at the starting point, aim the laser at the surface you want to measure, and press the measuring button. For continuous measurement, move the device toward or away from the target while watching the displayed distance. Always check the measuring reference point and follow the instructions supplied with the specific unit.
For best results, aim at a solid, clearly visible surface. Very bright light, reflective materials, transparent surfaces, or targets beyond the tool’s range may make readings less reliable. Avoid pointing the laser at people or animals, and follow the product’s laser safety instructions.
Where It Can Help
The Bosch GLM 20 is well suited to tasks such as measuring room dimensions, checking wall-to-wall distances, planning furniture placement, estimating the length of a hallway, and taking quick measurements where a tape measure would be awkward. It can also be useful for basic renovation and maintenance work when a single distance measurement is all that is needed.
What to Consider Before Buying
The GLM 20’s simplicity is one of its main advantages, but it also means it may not have the advanced functions found on higher-end laser measures. If you need automatic area or volume calculations, indirect height measurements, memory, or expanded connectivity, check the specifications of other Bosch models before choosing.
It is also worth considering the measuring environment. A laser measure is convenient for long or hard-to-reach distances, but a tape measure may be more practical for short measurements, flexible surfaces, or situations where the laser cannot be aimed at a suitable target.
Is the Bosch GLM 20 a Good Choice?
The Bosch GLM 20 is a practical option for anyone who wants a compact laser measure for basic distance measurements. Its simple controls, portable design, and useful measuring range make it a good fit for everyday home and work tasks. For users who need more calculations or specialized features, a more advanced model may be a better match. Check the product documentation and current retailer listings to confirm specifications, included accessories, and availability before purchasing.
Top 7 FAQs About the Bosch Laser Measure GLM 20: Calibration, Usage, Accuracy, and More
- Can you calibrate a Bosch laser measure?
- How do you use a Bosch laser measure GLM 20?
- Which laser level is better, Bosch or Milwaukee?
- How accurate is GLM 20?
- How accurate is Bosch laser measure?
- How much does a laser measuring device cost?
- How do I change my Bosch GLM 20 from meters to feet?
Can you calibrate a Bosch laser measure?
The Bosch GLM 20 does not have a user-accessible calibration setting, so you generally can’t calibrate it yourself through the device. If readings seem inaccurate, check that the tool is positioned correctly, the target surface is suitable, and the battery is working properly, then compare a measurement against a reliable reference. If it still appears outside the accuracy range stated in the manual, contact Bosch service or an authorized repair center for inspection; avoid opening or adjusting the instrument yourself.
How do you use a Bosch laser measure GLM 20?
To use the Bosch GLM 20, place the base of the device at your starting point, aim the laser at the surface you want to measure, and press the measuring button. The distance will appear on the display. For continuous measurements, press and hold the button while moving the device toward or away from the target, then release it to stop. Keep the laser aimed at a solid, visible surface, and follow the safety instructions in the product manual.
Which laser level is better, Bosch or Milwaukee?
The better laser level depends on your project and the features you need. Bosch and Milwaukee both offer reliable options, but their models vary in accuracy, range, visibility, durability, and price. The Bosch GLM 20 is a laser distance measurer—not a laser level—so it measures distance rather than projecting level lines. Compare specific models and choose one that fits your intended tasks, work conditions, and budget.
How accurate is GLM 20?
The Bosch GLM 20 is rated for accuracy of approximately ±1/8 inch (±3 mm) under suitable measuring conditions. For the most reliable results, aim the laser at a solid, clearly visible surface within the tool’s measuring range, and avoid reflective or transparent targets and very bright light, which can affect readings. Always check the specifications and instructions for your particular GLM 20 model.
How accurate is Bosch laser measure?
The Bosch GLM 20 laser measure is specified to measure with an accuracy of approximately ±1/8 inch (±3 mm) under suitable conditions. Actual results can vary depending on the target surface, lighting, distance, and how steadily the device is positioned. For the most reliable reading, aim at a clear, stable surface and follow the instructions for the measuring reference point.
How much does a laser measuring device cost?
The cost of a laser measuring device varies by brand, range, accuracy, and features. Basic models, such as the Bosch GLM 20, are generally among the more affordable options, while devices with longer ranges or advanced functions—such as area and volume calculations, Bluetooth connectivity, or indirect measuring—typically cost more. Prices can also vary by retailer and over time, so check current listings to compare options and confirm what’s included.
How do I change my Bosch GLM 20 from meters to feet?
To switch your Bosch GLM 20 from meters to feet, turn the tool off, then press and hold the measuring button for about five seconds until the display changes units. If the setting doesn’t change, repeat the process with the tool off and consult your model’s manual, as the available units or button behavior may vary slightly by version.
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