The DynaMIC Rebound Hardness Tester operates according to the rebound hardness testing method on ASTM A956 and DIN 50156 standards.

It uses a special signal processing technique that automatically compensates for changes in testing direction. Position the impact devices and read the hardness value - that is hardness testing in a matter of seconds. Different impact devices are available to ensure an optimum match to material and application. The DynaMIC DL Data Logger model can internally store hardness values along with statistical information.

The DynaMIC operates according to the rebound method in which an impact body is impelled against the test surface by spring force. The hardness value is calculated from the ratio of speed of the impact body before impact and after rebounding from the test piece. To improve on this established testmethod, the DynaMIC employs a patented and innovative signal processing technique that automatically compensates for changes in impact direction and distance variations caused when measuring small radii.

With the DynaMIC you are immediately able to carry out measurements in any direction without affecting the accuracy of the test results. It is unnecessary to enter the impact direction of test prior to taking a measurement. This well-known advantage of the UCI method is now at long last also available for rebound hardness testing using the DynaMIC. In addition, the well-proven calibration feature of the MIC 10 has been adopted in the DynaMIC. A precise calibration for a specific alloy within one of the nine preset material groups or an exotic material is quickly performed and easily recalled later. The DynaMIC even allows you to generate and store additional, company-specific material groups.

By simply pressing a key you can choose between displaying a single value or the average value of a measurement set. Adjustable alarm thresholds indicate critical readings to you both visually and audibly. A special configuration feature allows you to select the scales and features for your particular testing requirements. This simplifies operation and increases operational reliability.

The DynaMIC also ensures measurement reliability by displaying the total number of all measurements taken with an impact device. This assists in scheduling maintenance or predicting replacement of the impact body.

The DynaMIC DL Data Logger model can internally store hardness values along with calculated statistical information. The instrument accepts memory cards which can supplement this data storage capacity and be used as parameter cards.
As a parameter card, calibration values and instrument settings can be easily stored and recalled, which ensures the integrity of the test results and simplifies future instrument set-up.

You can print out test reports in a format of your choice or transfer your data to the PC via the RS232 interface. Our application software from the Ultra-HARD series offers you numerous possibilities for further data processing.

  • Solid, coarse-grained components
  • Machine parts made of steel and cast aluminum alloys
  • Large series parts during production
  • Heavy forgings

Test method

Rebound hardness testing according to ASTM standard specification A 956; dynamic measuring method; ratio of rebound (Rp) and impact (Ip) velocities with output of hardness in Leeb's hardness value HL = 1000 Rp/Ip

Impact Device

Dyna D: tungsten-carbide spherical test tip of 3 mm (0.12") diameter, length 160.5 mm (6.3"), standard impact device
Dyna G: tungsten-carbide spherical test tip of 5 mm (0.2") diameter, length 265 mm (10.4"), for solid test pieces, e.g. castings, forgings
Dyna E: diamond test tip, length 168 mm (6.6"); for the hardness range over 650 HV

Measuring Range

Depending on material groups;
e.g. low-alloy steel:
150-1000 HL; 75-1000 HV; 75-700 HB;
35-100 HRB; 20-70 HRC; 30-100 HS;
250-2200 N/mm2
9 fixed material groups stored,
5 material groups user-programmable


4-digit LCD with switchable backlight


1 HL; 1 HB; 1 HV; 5 N/mm; user selectable 0.1; 0.5; 1 HS / HRC / HRB


Display of the average value;
DL version: printout with maximum, minimum, average, absolute and relative range, absolute and relative standard deviation

Automatic Instrument Switchoff

After 3 min. of non-use in the average mode


Battery operation (2 x 1.5V AA batteries)
AlMn / NiCd / NiMH

Operating Time

AlMn / NiMH: > 30 hours
NiCd: > 24 hours
without backlight

Operating Environment

Operation: -15 deg C to 50 deg C (5 deg F to 122 deg F)
Storage: -40 deg C to 70 deg C (-40 deg F to 158 deg F)


~300 g (~ 0.7 lb)


160 mm W x 70 mm H x 45 mm D (6.3" W x 2.8" H x 1.8" D)

Data memory (only DynaMIC DL)

Data Logger up to 1,800 measurements, memory card up to 590 measurements, depending on the number of measurements per set. Storage of user's own material tables with DynaSoft.

Interface (only DynaMIC DL)

RS-232 C bidirectional

Test Attachments

For better positioning with curved surfaces; for spherical, hollow spherical, cylindrical and hollow cylindrical surfaces with radii of 10 - 30 mm (0.4" - 1.2")

Other accessories

Impact devices for different applications, test attachments for curved surfaces, instrument carrier and prop-up stand, certified hardness reference blocks, application software, memory card