Self Contained IR Pyrometer - Metis Series - MB35

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Pyrometer Series Metis MB35 with temperature range starting at 35°C, utilizes a lead selenide detector with a filtered spectral response of 2 to 5 micrometers. Applications include CO2 laser heating/welding of metals, ceramics, composites and temperature measurement of metal surfaces above 35°C.

The emissivity of metallic surfaces increase with shorter wavelengths, therefore offer much better performance than pyrometers with similar low scale temperature ranges, but with longer wavelength e.g. 8 - 14 micrometers.

Other major benefits are smaller spot sizes, fast response times and digital signal processing which provides for very wide temperature ranges. The MB35 is designed with its optical and electronic parts housed in a rugged IP65, extruded aluminium casting.

Metis Series - Self Contained IR Pyrometer - MB35

Product Information

Pyrometer Series Metis MB35 with temperature range starting at 35°C, utilize a lead selenide detector with a filtered spectral response of 2 to 5 micrometer. Applications include CO2 laser heating/welding of metals, ceramics, composites and temperature measurement of metal surfaces above 35°C.

The emissivity of metallic surfaces increase with shorter wavelengths, therefore offer much better performance than pyrometers with similar low scale temperature ranges, but with longer wavelength e.g. 8 - 14 micrometer.

Other major benefits are smaller spot sizes, fast response times and digital signal processing which provides for very wide temperature ranges. The MB35 is designed with its optical and electronic parts housed in a rugged IP65, extruded aluminum casting.

Lenses

The infrared energy radiated by the target is centered via a focusable or fixed focus lens directly on the detector. The easy to adjust focusing feature, allows control of the cone of vision and offers the possibility to measure either a small spot (focused) or the average of a bigger spot size (out of focus condition). Fixed focus optics provide a larger diameter lens and therefore collects more infrared energy which results in smaller spot sizes and generally, lower zero scale temperature. The lenses are made of calcium fluoride (CaF2), which are highly transparent in the 2-5 µm spectral region. If additional windows are used, they must offer similar optical characteristics.

Focusable Lenses

The detector is sensitive to infrared radiation in an area called the “cone of vision”. The cone of vision/aperture diameter at the optical lens is about 16 mm. This area has to be kept free from any intervening objects. The spot size diameter for distances not given in the chart can be calculated by interpolation.

Fixed-Focus Lenses Temperature Ranges: 35 to 700°C or 50 to 1000°C. The lenses with a longer lens tube of 89 mm, offer better optical resolution and therefore a smaller spot size. The cone of vision/aperture diameter at the optical lens is 27 mm.

Optical Alignment

Metis MB infrared temperature sensors are available with 2 different solutions for aiming the sensor onto the target. The first and most popular method is the focusable built-in laser pointer. The second is sight-through optics with a circular reticule that defines the target size. This is advantageous for applications where aiming onto hot incandescent targets, viewing down long sight tubes or inside closed vessels is required.

Temperature Output Signals

Metis non-contact infrared thermometers offer a variety of analog and digital output signals for displaying, recording, archiving and controlling of measured process temperatures. The isolated analog output is switchable from 0 to 4 to 20 mA. Zero and full-scale temperatures are adjustable to cover any portion of the instrument’s available temperature span to a minimum of 50°C. There is a choice of 2 di gital communication interfaces: RS 232 or RS 485 max. 57.6 kBd. (Optional Profibus DP)

Temperature Ranges

50-700°C or 100-1000°C 35-700°C

 

Signal Filtering

For measuring and holding of the highest instantaneous temperature value (peak picker / maximum value storage) is provided to compensate interruptions or attenuations in radiation caused by bursts of steam, smoke or dust in the IR sensor’s cone of vision. It can be reset either automatically or manually by an external contact closure or periodically by user preset clear time. In this last case, the highest temperature will be held in a dual storage and will be reset in only one of the two storages after preset clear time to avoid a decrease of the temperature output, should a short cold period appear during the exact the reset time. The response time is the length of time it takes for the output signal to reach 90% of a step change in measured temperature. It can be used to filter out rapid variations in temperature and achieve a “more stable” signal for control or display purposes.

Software

The PSCWin Software is available for automatic or manual set up of the pyrometer, for recording and for storing of graphical data or table files. At the same time these files can be used for quality assurance purposes as the IR sensor parameter settings are recorded as well. Minimum computer requirements are: 500 MHz clock frequency and Windows 95, 98, ME, XP, Vista or Windows 7 operating system.