SR Series Infrared Two-color Sensor -
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•  Temperature range: 700 to 3500°C (1300 to 6500°F)
Self-contained, two-color IR pyrometer
Focusable, thru-the-lens viewing
No moving parts or filter wheels
Choice of optical resolution, response time and output signal
Rugged industrial housing for hostile environments
SR Series IR Sensor
SR Series IR Sensor SR Series IR Lens SR Series IR Side
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Product Description

The SR Series infrared thermometer is a two-color infrared thermometer protected from dust and spray by a NEMA 4 (IP66) rated casting. This pyrometer is ideally suitable for high temperature measurements and a good choice for molten metal, wire and rod forming, vacuum furnaces, induction heating and kiln applications.

The SR Series provides a 4-20 mA or 0-10 Vdc temperature output signal directly to the user's own analog or digital display, controller, recorder or computer, and eliminates the need for a separate indicator/processor unit. This unique, self-contained sensor saves valuable panel space, reduces installation costs and eliminates costly duplication of control instrumentation.

The advantage of a two-color, or ratio thermometer, allows reliable temperature measurements for difficult high temperature applications where target emissivity changes; where the target is too small and/or moving and cannot be completely resolved; or for applications where the object is partly obliterated by dust, smoke, or dirty viewing windows. The SR series will tolerate approximately a 95% reduction in radiation intensity due to low emissivity and non-resolved or obliterated targets.

The SLR (Single Lens Reflex) version allows you to simply aim at the target, focus through-the-lens and take a reading just as easily as with an SLR camera. A built-in reticle aids in defining the exact spot size to be measured. The standard objective lens provided permits a working distance range from 380 mm (15 inches) to infinity. A 230 to 380 mm (9 to 15 inch) close focus lens is optionally available. The choice of three optical resolutions (D/50, D/100, and D/150) permits measuring targets as small as 1.5 mm (0.06 inches). Additionally, a choice of four response times is available to fit specific application needs. The close focus lens is interchangeable in the field and changing the lens does not affect calibration.


The SR can be easily calibrated in the field using a certified black body and voltage measuring instruments.

Operating Ambient Temperatures

Sensor: 0 to 55ºC (30 to 130ºF)


Optional air cooling and water cooling, as well as additional mounting accessories are available for SR series IR sensors.

A list of accessories, additional specifications and product dimensions are available in the SR Series product brochure.

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