Weiss PSR - Internal

Stability Test Rooms

Weiss Stability Test Rooms (PSRs) offer cost-effective and reliable solutions for pharmaceutical stability needs. All designs are based on modular, insulated panels with a choice of interior finish. The temperature range of the room is typically from +15°C to +50°C.

The insulation elements of the system can be optimally adapted to an existing building structure since adherence to standard dimensions is not necessary.

Product Features

  • Choice of standard capacities up to 41m3
  • Temperature range from +15°C to +50°C, dedicated +5°C, -20°C and -40°C rooms available
  • Temperature fluctuation in time of ±0.3K
  • Temperature gradient of ±1.0°C
  • Humidity range from 20%RH to 80%RH
  • Humidity fluctuation in time of ±3%RH
  • PU insulation chamber elements with easy-to-clean, double-sided metal plate coating
  • Lockable test chamber door with emergency opening facility
  • Heating and cooling system consisting of ceiling vaporiser with integrated electrical heater and air-cooled refrigeration unit
  • Climate conditioning system with energy saving steam humidifier and separate dehumidifier
  • Micro-processor controlled control system in accordance with GAMP and FDA 21 CFR Part 11 with electronic temperature/humidity sensor
  • Safety temperature limiter for electrical heater and test chamber
  • Specimen protection tmin/tmax
  • Manufactured in the United Kingdom

User Benefits

  • Customised to suit specific user requirements
  • Tried and trusted - installed in the UK's leading pharmaceutical organisations
  • Cost-effective and reliable for high volume test applications
  • CFC-free test system elements
  • Service and maintenance-friendly
  • Safety tested with CE certification

Areas of Application



  • Full IQ, OQ, PQ including 2 x 24 hour temperature and humidity mapping (unloaded and loaded)
  • S!MPATI pharma software package for recording and processing of measurement values
  • Water-cooled refrigeration unit
  • Extended humidity and temperature performance envelopes
  • Entry ports
  • Customised test unit loading including adjustable shelving, loading trolley/s and retaining fixings
  • Higher fire rating if required
  • Access via doors from personnel to full width with additional porting and observation window/s
  • Local charter recorder - paper, paperless or paperless 21 CFR Part 11 compliant
  • Cable ports
  • Temperature and humidity sensor for connection to user monitoring system
  • Additional alarm pack with strobe and sounder
  • USB data collection point (data from controller)
  • Central monitoring system for multiple rooms