Following the introduction of proximity sensors in the early ’90s, this relatively simple device has played an integral role in most applications in the automation industry. Since then, proximity sensors have evolved and are offered in an endless range of sizes, types, materials of construction, and options to suit a multitude of applications.
Automation is an integral aspect of industries such as burn-in ovens, composite board manufacturing, molding operations, steel and glass production and heat treating. As these applications have grown and expanded, so too has the need for proximity sensors that can withstand rigorous, high temperature environments. Standard proximity sensors fall under the industry-standard specification IEC-60947-5-2, which defines the ambient operating temperature range of such devices to be -3 to 158°F (-25 to 70°C). In many cases, this is well below the necessary temperature requirements of high temperature applications. As a result, sensors with the ability to operate at 212, 302, 356 and 482°F (100, 150, 180 and 250°C) have emerged to meet these process applications.