Phone: 253-927-6186

Metrology calibration furnace.

ITL-M-17701 Low Temperature Metrology Furnace. Temperature 50°C to 500°C.
Realizes and maintains the freeze plateaux of Indium, Tin and Zinc Fixed-Point Cells.
The Low Temperature Fixed Point Furnace is designed specifically to realize and maintain the freeze plateaux
of 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.

Low Temperature Metrology Furnace.

Model  Description 
ITL-M-17701  Low Temperature Metrology Furnace. Temperature 50°C to 500°C
Fixed Points:
Indium 156.5985°C.
Tin 231.928°C.
Zinc 419.527°C.
6 to 12 Hour Plateaus.
Annealing Adapter.
Active and Passive Safety Circuits.

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 aluminum alloy, which provides a
very low thermal gradient along the core length. The main furnace heater is of the parallel-tube design
as 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 sensing element. The control 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, castor mounted and requires no
external supplies (except power).
ITL-M-17701 Low Temperature Metrology Furnace.
Temperature Range  50°C to 500°C 
Control  0.1°C Resolution 
Communications  Included as standard 
Supply  1.5kW, 108-130 or 208-240VAC, 50/60Hz 
Dimensions  960mm x 600mm x 560mm (HxWxD) 
Weight  254 lbs (115.2kg) 
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Hotek Technologies, Inc
tel: 253-927-6186