If you are an avid reader of HTM (Haunted Times Magazine – www.hauntedtimes.com) you may recall an article I wrote in the winter 2007 (Volume 2, Issue 1) edition titled “Finding & Understanding Your Cold Spot: A Scientific Explanation.” That article focused in the mechanics of how cold spots are created and how to find them but here we will reverse the subject matter and explore the instrument behind it all: the Infrared (IR) Thermometer.

            As many of you know one of the classic staples of any purported paranormal occurrence is the infamous cold spots that tend to drift and linger in certain areas, but how can we scientifically document these occurrences? Through the use of an infrared thermometer, also known as a non-contact or IR thermometer, we can locate and record data trends when these temperature anomalies occur. Below we will briefly review some of the data about IR Thermometers as well as features to be considered.

• Infrared thermometer – An instrument that focuses on and detects the infrared radiation emitted by an object in order to determine its surface temperature.

• Sometimes referred to as a “non-contact thermometer” because of its ability to measure temperature at a distance without actually coming into contact with the object being measured.

• Useful for measuring temperature under circumstances where probe type sensors can not be used or do not produce data for a variety of reasons such as:

o       The object is moving

o       The object is surrounded by an electromagnetic field (as in induction heating)

o       The object is contained in a vacuum or other controlled environment

o       Where fast response is required

            When shopping for an IR thermometer many paranormal investigators are not sure about the features that matter most on these devices. For the purposes of paranormal investigation rather than commercial or industrial applications we will review some of the specs and features of the various models offered.

• Temperature range: Depending on the model IR thermometers will range between -50 and 600 degrees Fahrenheit.

• Features: Fahrenheit / Celsius toggle, Battery Meter, Backlight on/off, laser pointer and “scan” functions which allow the investigator to sweep the area for cold spots should be considered.

• Distance Ratio: (a.k.a. Spot Ratio or Field of View) This feature describes the diameter of the temperature measurement area as it relates to the distance between the device and the object being measured.

• Accuracy: Typically +/- 1 degree per 6 feet (or better)

• Emissivity Sensor: Variable or fixed. A fixed sensor (which is most typical on non-industrial models) does not allow for adjustment or compensation when the investigator is working in certain environments that may contain reflective surfaces, however an adjustable emissivity sensor allows for the operator to compensate for these environmental issues therefore rendering a more accurate reading.   

• Price Range: $25 - $100

            As a final word on IR Thermometers I would recommend, as I always do, that when a consumer is going to invest in a technical product you should know what you are purchasing and how it should function. Check product reviews if possible, compare features on different models and don’t be afraid to shop around. A small investment of time in researching the product you want to purchase, ultimately, is an investment in your results on an investigation.  

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