Marshall™ Furnaces

The Marshall Furnace is a unit for horizontal operation, which give the operator a furnace with an extremely long and stable and flat temperature zone for a furnace of such compact design. Available in six (6) temperature ranges:

Features

Uniformity Rugged Design Variable Shunt Taps Multi-Zone Winding High Purity Ceramic Muffles

Versatility Convenience Wide Range of Sizes Thermocouple Ports Full Length Temperature Monitoring

The Marshall Furnace is available in varying ID and Lengths, click on the series required in the chart above for a complete chart of the sizes available.

SERIES	MAXIMUM OPERATING TEMPERATURE	ELEMENT TYPE
1000	To 1100°C (2000°F)	Heavy gage Nickel-Chrome wire wraped around a ceramic tube
1100	To 1200°C (2200°F)	Heavy gage Iron-Chrome-Aluminum wire wraped around a ceramic tube
1200	To 1300°C (2370°F)	Exposed heavy gage Iron-Chrome-Aluminum
1300	To 1425°C (2000°F)	Platinum (20%) Rhodium wire wraped around a ceramic tube
1400	To 1540°C (2800°F)	Four (4) strands of Platinum (40%) Rhodium wire wraped around a ceramic tube
1500	To 1700°C (3100°F)	Six (6) strands of Platinum (40%) Rhodium wire wraped around a ceramic tube

The spec sheets on the Marshall Furnaces are in a PDF format. You will need the Adobe Acrobat Reader to view these files. If you would like to download it, please click here.

Shunt Tap Operation

The length of the uniform temperature zone and the temperature variation allowable. By placing a suitable length of resistance wire from one shunt tap to another, a parallel circuit is created, reducing the amount of current through the windings at this point. The amount of current bypassed will depend on the amount of resistance wire used.