{"id":5100,"date":"2020-08-07T07:08:31","date_gmt":"2020-08-07T07:08:31","guid":{"rendered":"https:\/\/palas-china.com.cn\/en\/?post_type=product&p=5100"},"modified":"2025-01-20T12:27:46","modified_gmt":"2025-01-20T04:27:46","slug":"welas-digital-2000","status":"publish","type":"product","link":"https:\/\/palas.com.cn\/en\/product\/welas-digital-2000\/","title":{"rendered":"welas\u00ae digital 2000"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]The\u00a0welas\u00ae\u00a0<\/sup>digital 2000<\/b>\u00a0is a flexible, powerful and economical light-scattering spectrometer system, which determines particle concentration and size precisely and reliably.<\/p>\n

Unique are up to four measuring ranges in only one device:
\n\u2022<\/span>\u00a0\u00a0\u00a0\u00a00.2 \u00b5m \u2013 10 \u00b5m
\n\u2022<\/span>\u00a0\u00a0\u00a0\u00a00.3 \u00b5m \u2013 17 \u00b5m
\n\u2022<\/span>\u00a0\u00a0\u00a0\u00a00.6 \u00b5m \u2013 40 \u00b5m
\n\u2022<\/span>\u00a0\u00a0\u00a0\u00a02 \u00b5m \u2013 100 \u00b5m (additionally for sensors 2300 and 2500).<\/p>\n

welas\u00ae<\/sup>\u00a0digital 2000 is famous for up to 128 size channels per measuring range and a concentration range from < 1 particle\/cm3<\/sup>\u00a0to 106<\/sup>\u00a0particles\/cm3<\/sup>.<\/p>\n

The device is characterized by its optical fibre technology, too. The welas\u00ae<\/sup>\u00a0sensor is connected via a fiber optic cable with a length up to 30 m with the welas\u00ae\u00a0<\/sup>digital control unit.<\/p>\n

This leads to a minimization of particle losses in long sampling lines by simply installing the sensor directly at the sampling location.<\/p>\n

Connection via fiber-optic cable allows the welas\u00ae\u00a0<\/sup>2000 and 2000 P series sensors to be easily connected to the control and evaluation unit and interchanged as required.<\/p>\n

The welas\u00ae\u00a0<\/sup>sensors are equipped with different sized measurement volumes. This allows adaptation of the measuring device to the particle concentration present in the application, such that a high counting rate can be achieved with a short measuring time.<\/p>\n

The aerosol sensors allow reliable measurement in the concentration range from < 1 particle\/cm3<\/sup>\u00a0up to 106<\/sup>\u00a0particles\/cm3<\/sup>.<\/p>\n

The welas\u00ae\u00a0<\/sup>digital is based on scattered-light analysis on a single particle. In the welas\u00ae\u00a0<\/sup>digital, the special advantages of the well-known and internationally acclaimed welas\u00ae<\/sup>\u00a0system are combined with new and fast digital individual signal processing and coincidence correction is enabled.<\/p>\n

The high size classification accuracy and the high size resolution are guaranteed by the following special feature (see Graph 1):<\/b><\/p>\n

\u2022<\/span>\u00a0\u00a0\u00a0\u00a0White light and 90\u00b0 light-scattering detection
\nUnambiguous calibration curve
\n<\/b>\u2022<\/span>\u00a0\u00a0\u00a0\u00a0Patented T-aperture
\nNo border zone error
\n<\/b>\u2022<\/span>\u00a0\u00a0\u00a0\u00a0New digital individual signal processing<\/p>\n

Coincidence detection and correction of the individual signal making it possible to measure in higher concentrations.<\/b><\/p>\n

The welas\u00ae<\/sup>\u00a0digital measurement technology<\/b><\/p>\n

welas\u00ae\u00a0<\/sup>digital offers a new, fast 20 MHz signal processing processor, which analyses the progression of each particle signal. This makes it possible to recognise coincidental events in light scattering measurement technology at the individual signal and correct them (according to Dr. Umhauer \/ Prof. Dr. Sachweh).<\/p>\n

This way it is possible to increase the maximum concentration limit up to 106<\/sup>\u00a0particles\/cm3<\/sup>\u00a0(welas\u00ae\u00a0<\/sup>2070 sensor).<\/p>\n

Also in low concentrations < 1 particle\/cm3<\/sup>\u00a0with the welas\u00ae\u00a0<\/sup>2500 sensor, this leads to a higher measuring accuracy.<\/p>\n

High classification accuracy, high resolution capability and a high counting efficiency are the prerequisite for unambiguous particle measurement.<\/b><\/p>\n

\"\"
\nFig. 1: Resolution capability and classification accuracy<\/p>\n

The welas\u00ae\u00a0<\/sup>digital is characterized by its very high counting efficiency starting from 0.2 \u00b5m!<\/p>\n

\"\"
\nFig. 2: Example with 2200 sensor, in relation to LAS-X II<\/p>\n

The welas<\/b>\u00ae\u00a0<\/sup>PDControl digital software<\/b><\/p>\n

The welas\u00ae\u00a0<\/sup>digital is controlled via a laptop using the PDControl software. The software allows particle measurements and calibration of the measurement device. In addition, the measurements can be analyzed and compared in detail with a temporal resolution down to 10 ms.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"

Aerosol spectrometer with an aerosol sensor, highest particle size resolution, measuring range from\u00a0200 nm to 100 \u00b5m with light wave conductor technology<\/strong><\/p>\n","protected":false},"featured_media":5288,"template":"","meta":[],"_links":{"self":[{"href":"https:\/\/palas.com.cn\/en\/wp-json\/wp\/v2\/product\/5100"}],"collection":[{"href":"https:\/\/palas.com.cn\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/palas.com.cn\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/palas.com.cn\/en\/wp-json\/wp\/v2\/media\/5288"}],"wp:attachment":[{"href":"https:\/\/palas.com.cn\/en\/wp-json\/wp\/v2\/media?parent=5100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}