The following four options are available. An IR emitter should be chosen based on output intensity and radiating area.6363 : The uniform emissivity over a large radiating area, shape, and mounting position of this 140 W IR Element makes it easy to align with the input slit of a monochromator.6575 : This 22 W IR Element has a spectral irradiance very similar to a Nernst element. Like the 6363, its shape and mounting position make it easy to align with the input slit of a monochromator.6580 : This low wattage IR Element is the most inexpensive of the three offered. At 9 W, this IR Element is useful for its small, efficient radiating area of 0.14.80030 : This 24 W IR Element has the radiant output and spectral uniformity to be a practical option for IR instrumentation.

IR Elements with poor emissivity make obtaining an accurate temperature measurement difficult. For applications that require a temperature measurement by measuring IR emissions, emissivity of the IR element should be considered with the degree of accuracy required for the application.

A complete plug and play infrared light source can be constructed from an IR Element and Oriel's line of accessories for these IR Elements. In addition to an IR Element, the necessary components are as follows:

• 60041 (for 140 W IR Elements) or 60048 (for 9 to 22 W IR Elements) Socket Adapter
• 60000 Series Q Housing
• 60090 Interface Kit, for integrating QTH Lamps and IR Elements in Series Q Housings
• 68938 Constant Current Power Supply for QTH Lamps and IR Emitters