The Palas scattered light aerosol spectrometers are for particle size analysis and concentration determination. On the Palas Promo®, the welas® sensors, which are equipped with measuring volumes of different sizes if required, can be easily connected via optical fibres and exchanged as required. These sensors allow reliable measurement in the concentration range from <1 particle/cm³ to 10⁶ particles/cm³ and are available for measurement in both gases and liquids.

Unique are the up to four measuring ranges in one device:

• 0,2 µm – 10 µm
• 0,3 µm – 17 µm
• 0,6 µm – 40 µm
• 2 µm – 100 µm (additionally for sensors 2300 und 2500).

Up to 128 size channels per measuring range and a concentration range from < 1 particle/cm³ to 10⁶ particles/cm³ characterise the Promo® aerosol spectrometer.

A touch display enables convenient operation. Measurements can be started easily, with all data such as the current number distribution and number concentration as well as 24 other statistical values being evaluated and displayed in real time. With the Promo® as a stand-alone measuring device (i.e. without an external computer), continuous measurements are carried out. All accumulated data can be stored with a maximum temporal resolution of 1 s. The Promo® can thus be used independently for weeks. Promo® can thus measure independently for weeks and save accruing data. The Promo® can also be integrated into a company network for data transfer. The Promo® has a standardised interface and can be controlled by a process control system or by a simple Labview programme. Therefore, Promo® is particularly suitable for control and monitoring applications.

The different versions:

Promo® 1000

High-performance scattered light aerosol spectrometer system for particle measurement from 120 nm

Promo® 1000 H

With heating control up to 120 °C for welas® aerosol sensors

Promo® 1000 HP

With automatic control of the sampling volume flow by the welas® aerosol sensors under overpressure up to 10 bar or in temperatures up to 120 °C

Promo® 2000 (H 250° /HP 120°10bar)

Scattered light aerosol spectrometer system for process measurement and monitoring applications with fibre optic technology

Promo® 3000 (H 250° / HP 120°10bar)

Scattered light aerosol spectrometer system for process measurement technology and monitoring applications with two sensors for quasi-simultaneous measurement

The new Promo® measurement technology:

All Promo® have a new, fast 20 MHz signal processing processor that examines the course of each individual particle signal. This allows coincident events, i.e. more than one particle in the measurement volume at the same time, to be detected on the individual signal and corrected (according to Dr. Umhauer / Prof. Dr. Sachweh). This enables the extension of the maximum concentration limit up to 10⁶ particles/cm³ (welas® sensor 2070). Even in low concentrations < 1 particle/cm³ with the welas® sensor 2500, this leads to a higher measuring accuracy.

The high classification accuracy and the high size resolution with regard to particle size are guaranteed by the following special features (see diagram 1):

• White light and 90° scattered light detection
      ⇒ Clear calibration curve
• Patented T-aperture
      ⇒ No edge zone error
• New digital single signal processing
      ⇒ Coincidence detection and correction on the single signal, allowing measurement at higher concentrations.

For further information you can contact us by contact form or Tel: 044 7463220