One supplier - complete innovative solutions for your laboratory requirements



Send us an enquiry

TBH 425 Series


The TBH 425 is a tablet hardness and combination testers for automatic measurement of up to 10 samples. The samples are inserted in a star-shaped feeder which automatically transports the samples to the test station. Depending on the model, automatic measurements can be taken for tablet hardness and optional thickness, diameter or length (oblongs) of round and odd shaped samples.


An aligment routine for oblong shaped samples as well as a support-groove in the hardness test station (optional) help to align odd shaped samples while breaking. Via the numeric membrane keypad with alpha-numeric sub function the nominal hardness in combination with 3 individual plus/minus tolerances (T3 = pass/fail criteria) and remarks may be stored for up to 50 different products and recalled for testing. Information such as product name and notes can be entered easily. Stored product data can be transmitted via a SD card or USB stick to other devices of the TBH 325/425 family.


Calibration is menu guided and may be performed with either weight stones or the electronic ERWEKA AutoCal 2.0 System. Via a USB printer interface a printer can be connected to print out documentation. The serial LAN/USB interface allows to connect a computer with the optional software for external control. In combination with this, the TBH 425 series is 100% 21 CFR 11 compliant.


  • 10 chamber star feeder with brushes to clean the transport way
  • Routine for alignment of oblong shaped samples
  • Tests samples up to 28 mm diameter
  • Measuring range 3 – 500 N
  • Accuracy ± 1N
  • Values in N, Kp or Sc
  • “Turbo” hardness test jaw, 3 times faster than the previous version
  • Numeric keypad with alpha-numeric sub function for entry of test parameters, product name, batch number and remarks
  • Integrated menu for calibration and adjustment with documentation print out
  • LAN/USB interface for external control and storage of results by the optional software
  • USB interface for USB memory stick standard
  • SD – card slot
  • USB printer interface for documentation of time, date, results and statistics


Fields Marked with a * are required
*First Name
Last Name
Phone Number
Comments enquiry