The high-performance Convir Thermosight series of handheld infrared thermometers from Calex Electronics includes models suitable for virtually all applications, from monitoring sub-zero freezer temperatures, through glass production, right up to white-hot metal processing. Now, to increase their flexibility, they can also be provided with a USB interface, enabling them to be connected to a PC quickly and easily.
Nine different models of Thermosight thermometer are available, starting with the Thermosight 400, 500 and 600. These models have temperature ranges from -32 to 400, 500 and 600degC, respectively, and have distance-to-spot ratios ranging from 10:1 to 30:1. They all have laser sighting, adjustable emissivity, large backlit displays and can show instantaneous, minimum, maximum or average temperature measurements.
The Thermosight 800 and 900 models can measure up to 800 and 900degC, respectively, and both have narrow 50:1 optics with concentric laser sighting. The Thermosight 800 has internal data storage for 20 measurement values, while the Thermosight 900 plus model can store up to 250 values. The Thermosight 900 is the first model in the series to offer the new USB interface, which can be used for continuous data monitoring on a PC or for retrieving the stored values of the 900 plus model.
For glass measurement applications, the Thermosight GL features a 5.14um spectral range that enables it to measure a short distance into the surface of the glass, thereby cutting out the reflections that can cause spurious readings in other handheld infrared thermometers. This model has a temperature range from 150 to 1800degC, with focused 50:1 optics and concentric laser sighting. It also offers the USB interface, and the GL plus model can store up to 250 measurements in its internal memory for downloading later.
One of the most important features of the Thermosight HT model is the spectral range at which it operates: 1.45 to 1.8um. These wavelengths are useful for measuring high temperatures, as they correspond to the region where the peak energy emissions occur at these temperatures, enabling the HT to provide a very high 0.75 per cent accuracy across its 250 to 1800degC temperature range. This short-wavelength response is also suitable for measuring metals because, at shorter wavelengths, their emissivity values increase. In addition to this, the HT has a focused, ultra-narrow 200:1 field of view with concentric laser sighting. It also has internal storage for 750 measurement values and the USB interface.