CDN DTQ450X ProAccurate Quick-Read Thermometer
- Pocket-sized quick-read thermometer that's great for measuring temp in thin cuts of meat, fish or poultry
- 5-inch stainless steel stem can get a reading in 6-8 seconds; stainless steel housing surrounding the digital readout
- Large-digit readout, data-hold capabilities, 10-minute auto-off, plastic sheath with pen clip
- Temperature range of -40 to 450 degrees F (-40 to 230 degrees C)
- Powered by LR44 button battery (included); backed by 5-year limited warranty
CDN ProAccurate Quick-Read Digital Thermometer: NSF approved. 6-8 second response. Water proof and shatter proof. Data-hold. Big digit. Food-safe abs plastic. Recalibratable. On/off button. Temperature guide on sheath. Sheath can be used as handle extension. Mounting: pocket clip. Lr44 button battery included.
CDN DTQ450X ProAccurate Quick-Read Thermometer
Hi,I did the following:
How do those no contact laser thermometers work?There are thermometers that you just point them in the direction of an object, pull the trigger and a red light or laser(not sure which one) is emitted onto the object. The thermomete then gives a temperature reading of the object. How does this work??
Posted by William W
They measure the IR radiation given off by the object. The laser light helps you to aim accurately; it takes no part in the measurement.
Posted by sparky_dy
By sensing the infra-red radiation given off by the thing you are aiming at.
Look up "black body radiation" sometime.
Posted by Johanex
Laser thermometers are actually infrared thermometers. The laser is just there to make the thermometer easier to aim. Molecules are vibrating constantly; the hotter the molecule is, the faster it vibrates, creating infrared energy. Infrared (IR) thermometers measure the infrared energy given off by all objects. To display the temperature, the thermometer must convert the infrared energy it measures into an electrical signal, which is then converted into a temperature.
Posted by Gary H
Previous answers are right. To add detail... If you need an accurate temperature measurement, you need to do a little more than "point and shoot". The emissivity of a surface is a measure of how efficient it is at emitting radiation. It is the opposite of absorbance. As everyone knows, black surfaces heat up more quickly in sun light than white surfaces (the absorbance part). On the flip side, black surfaces cool off faster than white surfaces (the emissivity part). So, if you are going to use IR (infra red) radiation to measure the temperature of a surface, at a given temperature, a black surface will emit more IR than a white surface. Somewhere in the set up of the IR thermometer there is a setting for emissivity. If you want to, you can find handbook values for the emissivity of different materials and just plug in the handbook value. Some instruments actually compare two different IR wavelengths and use the difference to calculate temperature. One quick and dirty way to handle this problem is to put a piece of black tape on the surface and always shoot that spot for your temperature.
Posted by sathish t
This type of method is called pyrometry (measuring temperature without any direct contact with the hot body) and as temperature increases the hot body will emit radiations which can be absorbed by detector in which we are having a thermopile (thermocouples connected in series because the range of this type is always very high)to measure temperature.
Types.
Radiation type, optical type
I ve explained Radiation type
What do you think? Answer below!
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