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  • Model 525
  • Usually ships in 4-6 weeks


  • Temp range: -148°F to 104°F (-100 to 40°C)
  • Volume: 35mm diameter x 160mm deep
  • No costly, or hazardous fluids required
  • Calibrate multiple sensors
  • Stability:
    • At 0°C ±0.03°C (30m)
    • At -90°C ±0.02°C (30m)

The Isotech Model 525 Dry Block Calibrator offers operation to temperatures as low as -148°F (-100°C), and is the first dry block working to such low temperatures. Now it is possible to calibrate temperature sensors such as PRTs, Thermocouples and Thermisters at ultra low temperatures without the need for a liquid bath.

the 525 requires no costly or hazardous fluids, and offers great portability. This will be of particular value to calibration engineers working on site with low temperature freezers, as encountered in pharmaceutical, aeronautical and food environments. The minimum operating temperature is lower than stirred liquid laboratory calibration baths, and users in laboratories will also benefit by avoiding the ongoing need for expensive fluids.

The maximum operating temperature is 104°F (40°C), a little higher than the minimum operating temperature of Isotech Hot Blocks. This permits covering the range from -148°F (-100°C) to 1202°F (650°C) or higher with just two Isotech blocks. By limiting the maximum temperature, the reliability and operating life of the cooling engine is maximized, and has been agreed in consultation
with the licensee of the cooling technology.