Steam resistometer (BIER/CIER) Quality control and product development at the highest level

The Lautenschläger steam resistometer exceeds the requirements of DIN EN ISO 18472:2018-11 (Sterilization of health care products – Biological and chemical indicators – Test equipment). The BIER / CIER generates an almost ideal rectangular profile (square wave) for the pressure and temperature curve with extremely high accuracy.

Resistometer steam sterilizer for testing purposes BIER CIER

Applications for resistometers (BIER/CIER)

  • Testing of chemical indicators for steam sterilization in accordance with DIN EN ISO 11140-1, -3 and -4

  • Testing of biological indicators in accordance with DIN EN ISO 11138-1 and -3

  • D-value determination of test bacteria

  • Determination of heat resistance of microorganisms

  • Investigation of the inactivation kinetics of microorganisms on different surfaces

  • Determination of chemical reaction kinetics

  • Evaluation of the change in material properties (ageing) under the influence of moist heat in the temperature window between 60°C and 150°C

The unsurpassed measuring and control accuracy of the Lautenschläger steam resistometer(BIER/CIER) reliably ensures reproducible results. For example, the turnover behavior of indicators can be tested precisely without rising and cooling times influencing the results.

  • The holding time (sterilization time) is not preceded by a fractionated vacuum; the specified temperature is reached within a few seconds.

  • The stabilization phase (time from reaching the target temperature for the first time to reaching the plateau phase) is significantly shorter than specified in the standard.

  • The maximum temperature deviation in the plateau phase is less than 0.1 °C.

  • The decay time to the “zero reaction point” (usually 100 °C) is shorter than specified in the standard.

  • After the end of the plateau phase, the ambient pressure is reached in less than 60 s.

Resistometer steam sterilizer for testing purposes BIER CIER
Hohe Mess- und Regelgenauigkeit Resistometer

Comparison of the specifications from the standard (DIN EN ISO 18472) with real measured values of the Lautenschläger BIER / CIER

The Lautenschläger Steril software allows individual programming of sterilization cycles. Both exposure times (holding times) and temperatures can be freely programmed. Air injection cylinders, leakage valves, sight glasses and many other optional extras are available, allowing product development to be optimized and accelerated.

  • Lautenschläger Sterile software with 21 CFR Part 11-compliant audit trail and user management

  • Programming of processes via recipe management tool

  • Tamper-proof storage of cycle data

  • Database system with extensive search and filter function