The unique optical Schmidt hammer designed specifically for rock testing
High performance
Unique optical measurement system ensures low dispersion and maximum accuracy in comparison with classical hammers
Dedicated design
Swiss made hammers specifically designed for rock testing with multiple applications – UCS, E-modulus, weathering grade
Increased flexibility
Work with the hammer alone, or using the mobile app for fast documentation of your measurements and secure sharing via Screening Eagle Workspace
Rock Schmidt App
The dedicated rock testing app
Free updates and releases
Developed specifically for rock testing
The world’s most advanced rebound hammer
Can be used with iPad
The Original Swiss-made rebound hammer with its unique optical measurement provides the most accurate correlations possible for rock testing applications. Measure, evaluate, report and collaborate.
Free updates and releases
Developed specifically for rock testing
The world’s most advanced rebound hammer
Can be used with iPad
The Original Swiss-made rebound hammer with its unique optical measurement provides the most accurate correlations possible for rock testing applications. Measure, evaluate, report and collaborate.
Rock Schmidt App
Custom materials
Correlate directly to UCS or e-modulus
Take advantage of existing correlations
Apply polynomial or exponential correlations
Set units and limits for the correlation
Build your own database for different rock types
Correlate directly to UCS or e-modulus
Take advantage of existing correlations
Apply polynomial or exponential correlations
Set units and limits for the correlation
Build your own database for different rock types
Rock Schmidt App
Work with rock testing standards
Rebound value determination according to ASTM D5873
Rebound value determination according to ISRM guidline (International Society of Rock Mechanics)
Weathering grade determination according to ISRM guideline
Rebound value determination according to ASTM D5873
Rebound value determination according to ISRM guidline (International Society of Rock Mechanics)
Weathering grade determination according to ISRM guideline
Rock Schmidt App
Collaboration and easy reporting
Visual report generation using lists, bar charts and statistics
Single and multiple series export in PDF or CSV format
Logbook annotations for full traceability (geolocation, text, images, voice)
Collaborate with colleagues using the Screening Eagle Workspace platform
Visual report generation using lists, bar charts and statistics
Single and multiple series export in PDF or CSV format
Logbook annotations for full traceability (geolocation, text, images, voice)
Collaborate with colleagues using the Screening Eagle Workspace platform
Rock Schmidt App
Tech Specs
Mobile app
Compatible with Apple® iOS devices (iOS 12 and later) Android 6.0 and higher
Workflow features
Voice read-out of each impact (only on iOS®) Logbook with geolocation, audio, image and text annotations Series statistics User definable conversion curves to unconfined compressive strength (UCS) and E-modulus Data export: CSV, pdf
Verification features
Software assisted verification on an anvil
Workspace
Screeningeagle.com - web based handling View and manage data Instant collaboration with colleagues worldwide Cloud back up of data
Automatic calculation of rebound value according to international standards
Technology
Optical rebound velocity quotient
Key features
Impact angle independent Displays the impacts on-screen as you work Select standard on instrument Work with hammer independently and upload later if desired to connected app. Connect to iOS, android and portable printer
Impact energy
N 2.207 Nm L 0.735 Nm
Display
Analog & backlit digital (100 x 100 pixels, graphic)
Are there any rebound hammer conversion curves available for rock testing?
There are many rebound hammer correlation curves freely available for different lithologies to be found in literature on the internet. e.g. Aydin, A. & Basu, Arindam. (2005). The Schmidt Hammer in rock material...
There are many rebound hammer correlation curves freely available for different lithologies to be found in literature on the internet. e.g. Aydin, A. & Basu, Arindam. (2005). The Schmidt Hammer in rock material characterization. Engineering Geology. 81. 1-14. 10.1016/j.enggeo.2005.06.006.
Most of these curves were created with classical R-value hammers and can be used entered directly as a custom material curve in the Original Schmidt Live app.
To use with the Rock Schmidt it is necessary to convert to a Q-value curve. Typically the Q-value is R-value + 10.
e.g. Katz et al. (2000)
UCS = 2.21e(0.07R)
Using the R-value curve and the corresponding Q-value it is a simple matter to derive the Q-value curve using the trendline function in spreadsheet software.
UCS = 1.0975e(0.07Q)
Visit the download section below to see the full Rock Schmidt Conversion Curve Database.
ASTM D 5873 (Rock)
ISRM