Tools / Power Tools
BOSCH 100-25C GLM Professional Instruction Manual
Comprehensive instruction manual for the Bosch GLM 100-25 C and GLM 150-27 C Professional laser distance meters, covering safety, operation, technical specifications, and maintenance.
Table of contents
Manual images
Jump to the sectionProduct Overview
The Bosch GLM 100-25 C and GLM 150-27 C are professional digital laser distance meters designed for measuring distances, lengths, heights, clearances, and inclines, as well as calculating areas and volumes. These devices are suitable for both indoor and outdoor use and feature Bluetooth connectivity for data transfer to other devices.
Safety Instructions
Read all instructions carefully. Failure to follow the safety guidelines may compromise the integrated protection mechanisms of the measuring tool. Never make warning signs on the tool unreadable. Do not direct the laser beam at persons or animals and do not stare into the direct or reflected laser beam. Do not use laser viewing glasses as protective goggles or sunglasses. Keep the tool away from medical implants, such as pacemakers or insulin pumps, as the magnets inside can impair their function.
Operation and Setup
The device is powered by batteries (GLM 100-25 C) or a rechargeable Li-ion battery (GLM 150-27 C). Ensure correct polarity when inserting batteries. For the GLM 150-27 C, use a compatible USB power supply for charging. To operate, press the measuring button to switch on the tool and the laser. The device defaults to length measurement mode upon startup. The reference level can be changed between the rear edge, the tip of the stop plate, the front edge, or the center of the tripod thread.
Measuring Functions
The tool offers various functions, including length, area, and volume measurement, indirect distance measurement (height, double height, length), trapezoid measurement, wall area measurement, stake-out function, grade measurement/digital spirit level, and continuous measurement. An integrated help function provides detailed animations for each function.
Maintenance and Troubleshooting
Keep the measuring tool clean, especially the reception lens, laser beam output, and camera. Do not use detergents or solvents. If the tool detects a defect, it will display an error message and switch off; in this case, contact Bosch customer service. Store and transport the tool only in the provided protective bag.
Manufacturer information
Bosch
Practical help
Common problems
Device does not switch on
Check if batteries are inserted correctly or if the Li-ion battery is charged.
Error message on display
The device has detected a defect. Contact Bosch customer service.
Bluetooth connection failure
Ensure Bluetooth is activated on both the device and the mobile terminal.
Before use
- Ensure batteries are inserted with correct polarity.
- For GLM 150-27 C, ensure the Li-ion battery is fully charged.
- Check that the reception lens, laser output, and camera are clean and unobstructed.
- Select the appropriate reference level for your measurement.
- Ensure the device is not exposed to extreme temperatures.
Specs in practice
- Measuring range
- The distance the laser can accurately measure (0.08–100m for GLM 100-25 C, 0.08–150m for GLM 150-27 C).
- Measuring accuracy
- The typical deviation of the measurement, rated at ±1.5 mm.
- Operating temperature
- The range in which the device functions reliably (-10 °C to +45 °C).
Images and diagrams
- The display shows the result line, target display (crosshairs), slope angle, date/time, and Bluetooth status.
- The device features a camera for targeting over long distances.
- The stop pin allows for measurements from corners.
- The integrated help function provides animations for complex measurements.
Model compatibility
- Bluetooth 4.2 Low Energy support required for mobile devices.
- Mobile devices must support the GATT profile.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.