Freeze Thaw Chambers

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.

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  • 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



  • 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 & Humidity Deviations
  • Door Opening
  • Water Supply Failure
  • Component Failure
  • Mains Failure



  • Mobile Alert system
  • Time of Alarm transmission
  • Name of Equipment
  • Transmitted Message (Equipment Name, Alarm time, Type of Alarm & Limits)



  • 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





Temperature Range -20°C to 50°C


Standard equipment


Double walled with 80mm PUF insulated modular panels with easy on-site assembly System is made up of split type condenser unit in well-ventilated area to avoid throw of hot air in the room
SS 304 Interior & Exterior either SS 304 or Powder Coated G.I. Stand by humidity system
Stainless Steel Trays Complete Operations driven through PLC with data logging capacity of upto 1000 readings & email facility
Full length Inner glass door High speed Ethernet based communication
Illuminated working area All operations through a single 4" Color Touch Screen
U-shaped SS tubular heaters High-quality German Make temperature humidity sensor with 4-20mA output
Forced air circulation for uniform temperature Safety devices: Low & High temperature cut-off settable thermostats & high humidity cut-off device
Non Condensing steam injection type humidity system with standby heater & auto switch overs Audio/Visual alarms for deviations
CFC free cooling system consisting of hermetically sealed compressor coupled with evaporation coil & condenser Complete with DQ, IQ, OQ, PQ & Operations & Maintenance Manual


Optional accessories


ICDAS - A Common Software suitable for 20 nos. Newtronic make equipments Door Access system
Remote alarm system suitable for 4 nos. Newtronic make equipments Mobile Alert system


Selection guide


Exterior &Interior is of stainless steel (SS 304) Capacity Internal Size External Size Tray Qty. Tray Size Approx. Weight kg
Cuft. Litres HxWxD (mm) HxWxD (mm) mm Equip Ship
NLFT7SI 7 200 1625 x 765 x 895 1350x630x945 3 430x460 150 225
NLFT11SI 11 300 1200x500x500 1880 x 765 x 945 4 430x460 200 275
NLFT16SI 16 430 1200x600x600 1950 x 1015 x 1090 4 560x560 250 325
NLFT21SI 21 600 1200x700x700 1950 x 1015 x 1170 4 660x660 275 350
NLFT28SI 28 800 1200x800x800 1950 x 1065 x 1310 4 760x760 300 400
NLFT34SI 34 1000 1425x800x840 2210 x 1065 x 1320 5 760x800 325 425
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