The INNOVATION of PALAS: The new aerosol spectrometer WELAS 3000 measures with two sensors at a source of light and an optical receiver! Thus with both sensors the same transient characteristic is reached.

Effective and accurate fairs with Palas technology a new function of the particle measuring instrument welas revolutionizes the filter examination the Palas GmbH, market leader in the area of the development and the production of filter test stands, for the particle measuring instrument tested in practical applications welas system a new function developed now, which makes the filter examination more accurate not only more simply, faster and more effectively, but above all for clearly safe and. The innovation: Two sensors of the system welas 2000 can be attached for the first time to the same control unit. The first sensor, which is installed for raw gas measurement before the filter, measures the high concentration with small measuring volume practically without coincidence errors. The second sensor for the clean gas measurement after the filter measures the low concentration with large measuring volume fast and surely.The crucial advantage: Since both sensors are attached to only Fotomultiplier and only one source of light, the transient characteristic of the sensors and signal processing is identical. Thus the measurement is crucially improved, because inaccuracies, which could arise so far due to the different transient characteristic of different particle measuring instruments, are avoided with the new multi-functional welas system. The sensors can be flanged on directly at the channel of a filter test stand, e.g. EN 779 or ASHRAE, whereby no particle losses in lines can occur. The fact that for the measurement only one control unit is needed means an improvement and a simplification of the filter examination, but also a clear reduction of costs for the user not only: The user can literally save further equipment.The measuring procedure of the welas sensors is based on the patented t-screen-technology, which for the first time permits a measurement without edge zone errors. Therefore the welas system offers the most exact measuring procedure to the user for droplets in the entire concentration and particle size range of the sensor. Also for solid particles this procedure offers special advantages and also for this successfully in practice assigned welas measures clearly and reliably within particle size ranges from 180 Nm to 40µm (model welas 1100). The modular developed measuring system welas 2000 makes measurements in so far unattainable environments as in highly combustible areas or in the stratosphere to -90° for C possible. The particularly small and light welas sensor (10x10x26 cm, 2.8 kg) is connected with the evaluation unit by fiber-optic cable cables. The distance between sensor and evaluation unit can amount to up to 300 m.For the evaluation of the data an efficient software tested in practice stands for order. Beyond that - depending upon need of the user - several auxiliary functions are optionally available (e.g. resistantly against aggressive media,  beheizbar to 120° C, pressure resistant up to 10 bar positive pressure). Recently exists also the possibility, which supplying and evaluation unit via the InterNet or via a network with the evaluation PC to connect (optionally). 2003 received the welas system an official Anerkennung durch the innovation price of the country Baden-Wuerttemberg. The Palas GmbH informs about the various application possibilities of the equipment as well as empiric reports from practice.