ST35 Suppository Disintegration Tester – Overview

The ERWEKA suppository disintegration tester ST 35 comes with three turning test stations, each located inside a four litre glass vessel with an optional magnetic stirrer. Additionally, the unit contains a thermostatically heated water bath (non-leaking and double secured), in which the test stations are placed. The test stations are automatically turned 180° in adjustable intervals.

The ST 35 features an integrated “high-power” flow-through heating system (accuracy ± 0.2° C) and an internal temperature sensor for temperature display. Test time and nominal bath temperature are easily entered via the membrane keys. Current test time as well as actual water temperature are shown on clearly visible red LEDs.

On request, an alarm may be selected to sound upon completion of the pre-set test time. Due to the width of the ST 35, the test stations can be easily separated to facilitate the cleaning process. Optionally, separately controllable magnetic stirrers can be placed in each test station (glass beaker) to get the required hydrodynamics.


  • Set of 3 magnetic stirrers, controlled by the membrane keys of the unit
  • USB interface for print-out
  • Water stabiliser with colour indicator – 1 bottle for 2 fillings.