In The Spotlight

EDUCATION - OUR ACADEMY KNOWLEDGE AND INNOVATIONS ARE OUR DRIVING FACTORS: HEAT BALANCE

My colleagues and me are fully aware that a productive relationship between you, our partners, customers, distributors,  is based on us providing the feedback and training yo need to understand how our unique infrared non-contact temperature sensors work and how they can be perfectly deployed in a wide range of applications.

We therefore explain a couple of our unique technologies and opportunities:

1. Heat balance

Exergen’s heat balance method measures fluid temperature inside of devices by measuring both the tubing surface and ambient temperature, then calculating the internal temperature necessary to maintain the heat balance. In medical applications this ensures patient safety as it provides a method to measure fluid temperatures non-invasively. A convenient clip head provides a reproducible mounting location for the sensor and can be quickly removed from used tubing and attached to new tubing.

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CALIBRATION VERIFICATION PROCEDURE

For many OEM and general temperature control applications it is sometimes desirable to test sensors before being placed into service, or to conduct routine checking while they are in service. Accordingly, recommended procedures are presented to allow easy checking with commonly available equipment. However, prior to testing, it is important to understand what indications an actual IRt/c failure might cause.

Factory Calibration

The pre-calibrated IRt/c sensors (models without the “A” suffix that indicates user adjustability) are calibrated under conditions that optimize performance in actual use: target emissivity = 0.9 (a good general value for non-metals), and ambient temperature elevated to approximately 1/4 of the elevation of target temperature above room temperature (accurately simulates the effect of reflected energy). Since this type of test would require specialized devices, the procedures outlined have test standards that are slightly different, since they use blackbodies, or test surfaces/ambients whose properties vary to some extent.

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