AMETEK calibratorsAMETEK Test & Calibration Instruments Inc.’s new JOFRA® PTC-125 Cooler and RTC-159 Ultra Cooler calibrators are designed for applications that require either extreme cooling or high heat. According to the company, the two new options are characterized by:

Both Models

  • Highly efficient, free-piston Stirling cooler.
  • Improved heating and cooling speeds. 
  • Fast cool to -80°C in 65 minutes.
  • Large-diameter inserts designed to calibrate large-sized or multiple sensors at once.
  • Easy-to-carry design, weighing only 15 kilograms.  
  • Built-in, high-accuracy reference sensor.
  • Intelligent sensors for plug-and-play, failsafe connectivity.
  • Easy-to-read, full-color 5.7-inch VGA display.
  • USB connection for improved communications and software downloads.
  • Multi-hole insert kits that cover most commonly known sensor sizes.
  • Carrying case for improved portability and convenience. 


  • Wide temperature range (-90°C to +125°C).
  • Intuitive, easy-to-use interface.


  • Patent-pending Dynamic Load Compensation (DLC) system provides perfect temperature uniformity in the insert.
  • AMETEK’s most advanced reference temperature calibrator with the widest available temperature range (-100°C to +155°C).