The new Convir FLA series of fibre-optic infrared temperature sensors from Calex are said to provide a real step forward in terms of performance and accessibility over the existing FL models. Their wider temperature range adds extra flexibility, while their new USB interface allows for faster, simpler configuration and extra data logging/graph plotting functionality.
These new fibre-optic units are suitable for applications where traditional temperature sensors are unsuitable; for example, near induction heaters, in vacuums or in areas with high ambient temperatures.
The temperature range of the FLA models is 300-1300degC, which is a remarkable feat for a fibre-optic sensor. This new temperature range, combined with the short wavelength spectral response of 1.58-1.8um, makes the FLA units suitable for measuring the temperature of metal targets, even at relatively low temperatures.
Through the USB interface and AT-301U software, the temperature range, emissivity value and response time of these sensors can be configured to meet the requirements of individual applications. This software can also provide a real-time display of the current temperature measurement of the FLA sensor, and of the maximum, minimum and average readings. Furthermore the AT-301U software offers graph plotting functions and can save and export measurements as text files.
These sensors use optical heads with manually adjustable focal distances to provide the best possible measurement spot size at a given distance. Two versions are available, the LVO25 for very small measurement spots at short distances, giving a measurement spot of 1.6mm diameter at a distance of 80mm, and the LVO35 for measurements over longer distances, which provides a measurement spot of 11mm diameter at a distance of 1m. These optical heads provide a white LED pilot light to show both the position and size of the measurement spot for precise alignment.
The optical head and electronics enclosures are made of stainless steel and sealed to IP65 (IP54 where the fibre-optic cable enters). The optical head can operate in ambient temperatures up to 250degC without the need for cooling. The fibre-optic cable is protected by a stainless steel braid, with 1.5m of cable supplied as standard and up to 15m available on request.
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