Freeze Thaw or Cyclic Temperature stress tests are designed on the knowledge of the product so as to mimic likely storage conditions. The period of cycle is mostly considered 24 hours since the diurnal rhythm on earth is 24 hours.

Additionally, the distribution environment can vary greatly, especially when a drug product is shipped between various climatic zones. Seasonal changes, mode of transportation, and the number of drop-off points are also variables that should be considered within the pharmaceutical supply chain. Drug products requiring controlled-temperature storage conditions must be distributed in a manner that ensures that the product quality will not be adversely affected. With the exception of short transit times within the same climatic zone, it is virtually impossible to validate a shipping method against all environmental conditions.

Therefore, distribution stability studies are designed to generate additional data to complement preformulation development and routine (ICH) Q1A(R2).

NEWTRONIC Freeze Thaw Chambers control a broad temperature range of -20°C to 60°C thereby offering the flexibility to simulate a broad range of conditions. The min temperature, max temperature & cyclic time are all user-settlable thereby allowing the user to program a specific profile for their studies. Automatic cycling between the setpoints enables rapid simulation of conditions & the need to replicate freezing and thawing during product testing.


  • High-speed data transfer
  • Significantly faster than serial(RS-485) communication
  • Global standard for communication protocol
  • No need for a separate PC interface
  • Data Operations from any PC over the LAN
  • Complete Operations driven through PLC
  • No Data Loss: Data Storage of upto 1000 readings on the PLC itself
  • At an interval of 30 mins, data upto 20 days is stored on the PLC itself
  • Facility to send emails directly from the PLC
  • All operations through a single 4" Color touch screen display
  • PLC IP Address setting
  • Component Working Hours
  • Standby system change over
  • Password protection for set values and calibration mode
  • Completely ready-to-use systems
  • Automatic switch-over upon failure of primary systems to achieve conditions
  • Switch-over also upon detection of HP/LP & Internal fault
  • Scheduled & manual change-overs
  • Recording of all change-overs in the software
  • Password based access control
  • Restricts access to unauthorized persons
  • Mobile alert system
  • Time of alarm transmission
  • Name of equipment
  • Transmitted message(Equipment name, alarm time,type of alarm & limits)
  • When an alarm is triggered, an e-mail is sent to the registered PC or mobile address
  • *connection to a mail server is required to use e-mail alert.
  • Temperature Overshoot/Undershoot
  • Humidity Overshoot
  • Low water-level
  • Delay Timer to safeguard the Compressor
  • MCB to cut-off over-current supply
  • Standby Controlling Sensor upon failure of Primary
  • In Walk-in chambers door can be open from inside
  • Emergency Bell switch inside the Chamber
  • 21 CFR Part 11 Ready
  • Single software suitable for upto 20 equipments
  • Automatic daily data back-up
  • Alarm logs. Alarm acknowledgement with e-signatures
  • Audit trails
  • MKT Calculations
  • Graphical viewing & data trending
  • Data export in pdf format
  • IQ, OQ, PQ
  • Calibration certificates
  • Operations & maintanance manuals
  • GA & Electrical drawings
  • Material test certificates
  • Training to end-users

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