Bosch GMM 1-15 Moisture Meter 601078200

For building inspectors, flooring installers, and restoration professionals, the Bosch GMM 1-15 moisture meter provides reliable moisture readings in wood and building materials. Its resistance measurement principle and LED traffic light display give clear, immediate feedback on material condition, helping you make informed decisions on-site.

Key specifications

• Measurement principle: Resistance measurement
• Measurement range (wood): 6% to 60%
• Measurement range (building materials): 0.2% to 30%
• Measurement accuracy (wood): ±1% (6-30%), ±2% (30-60%)
• Measurement accuracy (building materials): ±0.2% (0.2-10%), ±2% (10-30%)
• Material groups: 8 for wood, 2 for building materials (concrete, screed)
• Display: Segment display with LED traffic light
• Power supply: 4 x 1.5 V LR6 (AA) batteries
• Battery life: approx. 20 hours
• Auto power off: after approx. 5 minutes
• Operating temperature: -5 °C to +50 °C
• Storage temperature: -20 °C to +70 °C
• Protection class: IP54
• Measuring pins: integrated, replaceable
• Functions: self-test, hold, factory calibrated

Why choose it

The GMM 1-15 combines a wide measurement range with a simple traffic light display. The LED indicator shows green, yellow, or red based on moisture level, so you can assess dryness at a glance without interpreting numbers. Its replaceable pins extend the tool's service life, and the IP54 rating means it withstands dust and splashes on the job site.

Ideal use cases

• Checking moisture content in firewood or timber before processing
• Assessing concrete or screed readiness before laying flooring
• Locating moisture issues in walls or ceilings during building inspections
• Verifying dryness after water damage restoration

Good to know

The meter is factory calibrated and includes a self-test function for quick verification. It uses four standard AA batteries, which are widely available. The device automatically switches off after about five minutes of inactivity to conserve battery life.