According to Raytek, it is important to choose the correct IR wavelength if reliable, accurate temperature measurement is desired. It is best to use the shortest possible wavelength for the temperature range: for temperatures over 900°C it is not advisable to use 8-14 μm, but a 1 or 2 μm wavelength; less than 900°C, 8-14 μm is used. These factors are extremely important when choosing the correct infrared thermometer. To this end, Raytek has upgraded its ST range to include the new ST61 which has gone through a shape change and offers more features than its predecessor the ST60.
Its IR temperature range is from -32 to 600°C with operation using the 8-14 μm wavelength, well suited for this temperature range. The unit also has a K-type thermocouple input with a range up to 1372°C. The normal input manipulations: instantaneous, average, min and max are still available along with a 20 point data gatherer installed and simple recall via the screen. The unit includes precision, high-resolution optics with excellent resolution (D:S ratio) of 30:1.
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