Model 747 High Accuracy Multi-Well Calibration System



  • Dual high accuracy low and high temperature dry well capable of laboratory as well as field calibration
  • Two independently controlled metrology wells.
  • Polished stainless steel cabinet construction.
  • Small footprint for field use.
  • Fast cooling time from ambient to –55°C in less than 40 minutes.
  • Temperature metrology wells permit calibration of RTD, thermocouple and any other temperature sensors at two different controlled temperatures.
  • Advance block design provides excellent temperature stability in both low and high range.
  • Designed for metrology laboratories and instrumentation department requirements.
  • Metrology blocks with 12 wells for up to 36 thermocouple calibrations.
   Model 747 Dry Block, Dry Well

Model 747 Specifications



Temperature range

Low temperature Block -50°C to 150°C

High temperature Block 40°C to 400°C


0.002°C at -50ºC to 150°C; 0.003°C at 40°C to 400°C

Cooling Time

40 minutes (from 25°C to –50°C)


12 wells / 8 mm dia. (other options available)

Immersion Depth

150 mm

Display Resolution



20 in. x 12 in. x 18 in. (508 mm x 660.4 mm x 457.2 mm)


30 kg

Heater Power

400 Watts


10 amp at 120 VAC 60 Hz

Power Line Voltage

120 VAC 60Hz ±10%

Dry Block Material

High Purity Aluminum

Cabinet Construction

Brushed or Polished 304 SS

Model 747 Graphics

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