A high performance temperature and relative humidity probe is located in each of the chambers. These are connected to integral data loggers which are battery powered. This means that the conditions in each chamber can be independently monitored and recorded with no need for an external power supply.
The tablets/capsules to be analysed are added to a chamber and sealed with the screw on cap. Two samples can be measured simultaneously, or one chamber is left open to provide a reference record of the ambient conditions outside the closed environment containing the sample under test.
Immediately the sample will begin to equilibrate with its surrounding atmosphere and either adsorb or desorb water until it reaches it equilibrium relative humidity (ERH).
The sensors and data loggers record the environmental conditions at user-defined intervals, typically every 1 minute, and this can be downloaded during a run or afterwards, as required. Water sorption/desorption can be observed in real time.
The exploded diagram shows one of Relequa tubes cut away to reveal the location of the 30ml HDPE container with a temperature / humidity probe sealed into its base (coloured section).
A specially designed locking mechanism holds the Relequa tubes in the main housing and ensures that full electrical contact is maintained for measuring temperature and humidity during shipping tests. The side of the Relequa tube is shaped to allow the tube to be gripped to disengage the locking mechanism and lift the tube away from the housing without distorting the electrical connections.
Relequa dimensions:
150 x 120 x 80 mm
