Precision resistance alloys are fundamental to temperature measurement, heating systems, industrial controls, and electronic sensing applications. Their performance depends on stable electrical resistance, predictable temperature characteristics, oxidation resistance, and long-term reliability under demanding operating conditions.

Sigmund Cohn Corp. manufactures precision nickel and specialty resistance alloys engineered for applications where electrical performance must remain consistent over extended service lives.

Whether developing RTDs, thermocouples, heating elements, hermetic seals, or industrial sensing equipment, our engineers work with OEM manufacturers to select alloys that meet both electrical and mechanical performance requirements.

Available Nickel Grades

• RTD-quality nickel
• High-uniformity TCR nickel
• DIN 43760-compliant nickel
• Commercially Pure Type 205 Nickel

Available Resistance Alloys

• Nichrome 60*
• Nichrome 80*
• Tophet A*
• Tophet C*
• Constantan®
• Nickel / Cobalt / Iron
• Aluminum / Silicon and Aluminum / Magnesium

Glass-to-Metal Sealing Alloys

Kovar* deserves special consideration in hermetic sealing applications because its coefficient of thermal expansion closely matches borosilicate glass, allowing engineers to create highly reliable glass-to-metal seals for aerospace, electronics, medical, and industrial equipment.

Selecting a Resistance Alloy

Our engineering team helps customers evaluate:

• Electrical resistivity
• Temperature coefficient of resistance (TCR)
• Operating temperature
• Oxidation resistance
• Thermal expansion
• Mechanical strength
• Cross-sectional geometry
• Long-term stability

Material can also be supplied to specified electrical resistance values.

Typical Applications

• Resistance Temperature Detectors (RTDs)
• Thermocouples
• Heating elements
• Industrial instrumentation and process control
• Aerospace sensing
• Automotive safety systems
• Hermetic feedthroughs
• Precision electrical assemblies

Contact our engineering team to discuss your resistance alloy, temperature sensing, or custom material requirements.

Nichrome 60 and Nichrome 80 are registered trademarks of D. H. Alloys, Inc. Kovar, Tophet A, and Tophet C are registered trademarks of CRS Holdings, Inc., a Carpenter Technology company. Constantan® is used in accordance with applicable trademark rights.