BOSCH GLM100-23
BOSCH GLM100-23 100 Ft Blaze Laser Distance Measure User Manual
Model: GLM100-23 | Brand: BOSCH
1. Overview
The BOSCH GLM100-23 100 Ft Blaze Laser Distance Measure is a fully featured tool designed for precise and easy measurements. It features a bright graphic display for clear readability in various lighting conditions, intuitive controls, and robust construction. This device simplifies distance measurement tasks for professionals and DIY enthusiasts alike.
The compact design allows for easy portability, fitting comfortably in a pocket. Its durable full rubber overmold housing provides protection against impacts, ensuring longevity even in demanding work environments.

Image: Front view of the BOSCH GLM100-23 Laser Distance Measure, showcasing its display and main buttons.
2. Product Features
- Easy-to-Use: Simple, user-friendly layout with two-button operation for measuring and rounding.
- Accurate: Long-range measuring with extreme accuracy, measuring distances up to 100 feet to within 1/16 inch. Measures in meters, feet inches (with fractions or decimals).
- Display: Backlit graphic display with large icons for easy reading, even in low-light conditions. Offers improved readability compared to previous models.
- Portable: Compact design for easy carrying and pocket storage.
- Rounding Button: Unique function to easily round measurement results from 1/2 inch up to 1/32 inch.
- Class II Laser: Utilizes a 635 nm; <1 mW Class II laser for precise measurements.
- Durable Housing: Full rubber overmold housing protects key points of the device.

Image: Diagram highlighting key features of the BOSCH GLM100-23, including the display, buttons, and housing.
3. Setup
Battery Installation
The BOSCH GLM100-23 requires two (2) AAA batteries, which are included with the device. To install or replace batteries:
- Locate the battery compartment on the back of the device.
- Slide the battery lid latch to the 'OPEN' position and remove the lid.
- Insert the two AAA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Replace the battery lid and slide the latch to the 'CLOSED' position to secure it.

Image: Rear view of the BOSCH GLM100-23, showing the battery compartment and laser warning label.
4. Operating Instructions
Basic Measurement
To take a basic distance measurement:
- Press the red measurement button (large triangle) once to activate the laser.
- Point the laser dot at the desired target.
- Press the red measurement button again to take the measurement. The result will be displayed on the screen.

Image: The BOSCH GLM100-23 in use, showing the laser dot on a surface and the measurement displayed.
Changing Units
The device can measure in meters, feet inches (with fractions), or feet inches (with decimals). To change the unit of measurement:
- Press the '1/x' button (below the main measurement button) to cycle through the available units.
- The selected unit will be displayed on the screen.

Image: The BOSCH GLM100-23 display showing the unit selection interface.
Rounding Function
The rounding button allows you to easily round the measurement result to common fractions:
- After taking a measurement, press the '1/x' button repeatedly to cycle through rounding options (e.g., 1/2 inch, 1/32 inch).
- The display will show the rounded value.

Image: The BOSCH GLM100-23 display showing a measurement with rounding applied.
Official Product Video
Video: An official product video from BOSCH demonstrating the features and usage of the GLM100-23 Laser Measure.
5. Maintenance
To ensure optimal performance and longevity of your BOSCH GLM100-23, follow these maintenance guidelines:
- Cleaning: Wipe the device with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Lens Care: The laser lens is a sensitive component. Clean it only with a soft cloth, similar to cleaning camera lenses. Avoid touching the lens with your fingers.
- Storage: Store the device in a dry, dust-free environment, away from direct sunlight and extreme temperatures.
- Battery Removal: If the device will not be used for an extended period, remove the batteries to prevent leakage and damage.
6. Troubleshooting
If you encounter issues with your BOSCH GLM100-23, refer to the following common troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Dead or incorrectly installed batteries. | Check battery polarity. Replace batteries if necessary. |
| Inaccurate measurements | Laser lens is dirty; measurement surface is too reflective/absorbent; environmental factors (e.g., strong light). | Clean the laser lens. Use a target plate on difficult surfaces. Avoid strong direct light. |
| "Error" message on display | Measurement range exceeded; internal error. | Ensure target is within 100 ft range. Turn the device off and on again. If error persists, contact customer support. |
| Display is dim or flickering | Low battery power. | Replace batteries. |
7. Technical Specifications
| Specification | Detail |
|---|---|
| Brand | BOSCH |
| Model Number | GLM100-23 |
| Measuring Range | Up to 100 ft |
| Measurement Accuracy | +/- 1/16 inch |
| Laser Class | Class II (635 nm; <1 mW) |
| Power Source | 2 x AAA batteries (included) |
| Material | Rubber |
| Color | Blue |
| Item Weight | 3.04 ounces |
| Product Dimensions | 3.9"L x 1.7"W x 0.9"H |
| Country of Origin | Malaysia |
8. Warranty and Support
BOSCH measuring and layout tools are covered by a one-year limited warranty. You can extend this warranty by an additional year when you register your tool within eight (8) weeks of purchase. This provides a total of two (2) years of coverage.
For detailed terms and conditions, or for any support inquiries, please visit the official Bosch website or call their customer service line.
- Warranty Registration: Visit rb-pt.io/PowerToolWarranty
- Customer Support: Call 1-877-BOSCH99
Additional protection plans may be available for purchase separately, offering extended coverage beyond the standard manufacturer's warranty.