Home > Products > Primary Standards > Metrology Furnaces >

Low Temperature Metrology Furnace
Isotech Low Temperature Metrology Furnace
 
Temperature Range: 50°C to 500°C (932°F)
  • Uncertainty: <1mK (with cells)
  • Control: 0.1°C resolution, power feedback
  • Affordable single-zone furnace
  • For indium, tin and zinc fixed-point cells
  • Simple operation

Product Code: ITL-M-17701
Contact us for pricing

   Product Description    Specifications
 
The Isotech Low Temperature Fixed Point Furnace is designed specifically to realize and maintain the freeze plateaus of Isotech Indium, Tin and Zinc Fixed-Point Cells, for calibration of thermometers on the International Temperature Scale of 1990.

The Low Temperature Furnace is a single-zone furnace.

The recommended procedure for establishing a freeze plateau requires operator attention until the plateau is realized. Following that, the Model 17701 Furnace will maintain the indium or the tin plateau, essentially automatically, for a period of 10 to 12 hours, and the zinc plateau for 6 to 8 hours.

1. The furnace core, into which the freeze-point cell is inserted, is of aluminium alloy, which provides a very low thermal gradient along the core length. The main furnace heater is of the parallel-tube design used at NIST. A pre-warming tube is provided.

2. An advanced proportioning electronic control system regulates furnace temperature, using a platinum resistance thermometer as the sensing element. The controller may be calibrated in-situ using Freeze Point Cells as references.

Two entirely independent over-temperature safety devices are included. A dedicated (on-off) over-temperature control circuit provides active safety. A fusible link in the main power circuit provides passive safety.

3. The Low Temperature Furnace is completely self-contained, mounted on caster wheels, and requires no external supplies (except power).
Literature
Low Temperature Furnace Datasheet Low Temperature Furnace Manual