PTB 111E
Standard Hardness Test Instrument

To test hardness of any solid sample up to 300 or alternatively 500 N (Newton) the PTB 111E is designed. The PTB 111E is equipped with a COM port for data transfer and a Pinter port to record the results. The test result is immediately displayed at the LED display of the unit. It offers load cell adjustment and 3-point calibration menus. The instrument meets the latest requirements of the EP <2.9.8> and USP <1217> monographs.

Operating Principle
Depending on the tablet hardness you can manually test between 6 to 10 samples per minute. The user has to enter a nominal hardness and press the <START>-key. When all data has been collected simply press the <STOP>-key and get the results including statistical information printed at the attached printer. The auto re-start option allows a faster test and higher throughput of samples compared with a manual Start procedure.

A Note on Calibration

The current USP Pharmacopeia requires the force sensor of a tablet hardness testing instrument to be calibrated periodically over the complete measuring range (or the range used for measuring samples) with a precision of 1N. All Pharma Test tablet hardness testing instrument can be statically calibrated over the complete measuring range by the use of different tracebale counterweights. All instruments support the checking of at least three different points during calibration to prove the linearity of the force sensor. Furthermore, Pharma Test offers the PT-MT magnetic tablets to calibrate the breakpoint detection of the whole tablet hardness testing instrument (force sensor and mechanics of the instrument). All Pharma Test tablet hardness testing instruments are fully compliant to the requirements of the current USP Pharmacopeia.


  • Fully USP <1217> and EP <2.9.8> compliant
  • Dual force mode instrument with linear speed increase and linear force increase modes
  • Multiple point validation procedure built-in
  • Programmable print-out of force increase curve
  • Set to test tension strength of oblongs and caplets available
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