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Sophisticated Life Science Research Instrumentation Corona Discharge Unit For Reducing Electrical Charges on Aerosol Particles www.TSE-Systems.com [email protected] Specifications Total aerosol flow rate 1...15 m³/h (17…250 lpm) Dust and liquid aerosols 0.1 ... 150 μm Pressurized air supply max. 8 bar Power supply 100 ... 260 V AC Power consumption approx. 50 W Fuses 2A / F Ionization voltage 0 ... 10 kV Ionization current 0 ... 150 μA Dimensions of control unit approx. 480x260x160 mm Weight of control unit approx. 7.5 kg Mixing cell with ionization heads approx. 1.2 kg Input (potential free) 3 ... 30 V DC - typically 1 mA Output (potential free) 0 ... 60 V AC/DC - max. 400 mA Ordering Information Cat. No. Description 700700-Dis Discharge Unit CoDis for reducing positive and negative electrical charge of liquid and dust aerosols. The Corona Discharge Unit produces in two separate chambers positive and negative ions by a high voltage corona discharge. ■■ ■■ ■■ ■■ ■■ ■■ 2 no radioactive substances (permission unnecessary) positive and/or negative ions independent of aerosol mass flow differences rapid on/off switching of the ionic source adjustment of the discharge unit/adjustment of ionic concentration easy control of the functions www.TSE-Systems.com Corona Discharge Unit Operating Principle The discharge unit is based on the corona discharging principle and consists of a mixing cell with two separate ionization heads and a control unit. The control unit is used for parameter settings and function monitoring. Based on the physical principle of corona discharge caused by electrical fields, positive or negative ions are produced in the so-called ionization heads according to the polarization of the applied high voltage. Corona Discharge Unit The ionization heads produce positive and negative ions that are transported in succession to the mixing cell in the flow of compressed air connected to both of the ionization heads. Introduction Particles dispersed in aerosols are often highly charged due to mechanical interactions between one another and with the environment. These interactive forces can lead, for example, to agglomeration or other interactions which can be observed during particle size distribution characterization, sampling or separation of particles. This is why any such charges should be neutralized or, alternatively, the particles should have unipolar charges in order to avoid such effects. Working principle The corona discharger principle means that both positive and negative ions can be produced reproducibly and variably without the use of radioactive materials. With the Corona Discharge Unit it is possible to adjust the charge conditions in aerosols by using a defined supply of both positive and negative ions in a specially designed mixing cell. The special design of the mixing cell guarantees almost ideal mixing conditions for highest charging/discharging efficiency. Due to the charge exchange on the particle surfaces the particles become charged/discharged. The control unit provides the high voltage and constant ionization current supplied to the ionization heads. The degree of neutralization can be optimized for the particular application because both ion sources can be adjusted independently. The Corona Discharge Unit can condition dust as well as other aerosols by mixing it with positive and negative ions in a defined manner to obtain charge neutralization. Special Advantages ■■ Aerosol neutralization (charging) without radioactive source adjustment of both positive and negative ions Easy to integrate into existing inhalation systems and other exposure systems Ionisation heads and mixing cell ■■ Separate ■■ www.TSE-Systems.com Both the operating voltages as well as the operating current are displayed on the control unit front panel in kV and μA for precise and reproducible adjustment. 3 Sophisticated Life Science Research Instrumentation TSE Systems offers additional modules to create a complete exposure system. Please find out more about: ■■ Head Nose Only Exposure Units Modular, stackable structure for different size conditioning units. Available for animal sizes from mouse to dog with directed-flow principle Service & Warranty TSE Systems offers a Two (2) Years ALLIN Premium Warranty with all new products, including: 24/7 technical hotline Remote maintenance and update function ■■ On-site visits upon necessity ■■ Free replacement parts ■■ ■■ ■■ Whole Body Exposure Units Robust, user-friendly design for homogeneous test substance distribution. Different volumes available for variable animal sizes and test animal numbers ■■ Cell Culture Exposure System Ideally suited system for screening tests with tissue, using Transwell® inserts of varying sizes. Extended viability of cultures by heating/humidification ■■ Nanoparticle Analysis TSE System offers instrumentation to analyze nanoparticle size and concentration, such as Condensation Particle Counter or Differential Mobility Analyzer After the expiry of the warranty period, TSE Systems offers comprehensive extensions of the warranty or economical maintenance and repair contracts to ensure the continued smooth running of your instruments. Please contact us for further details. ■■ Daco Inhalation Software Control and recording software for inhalation systems with multi-control mode for system extension. Advanced safety and GLP compliance features ■■ Sensors and Controllers TSE Systems supplies a number of environmental sensors and mass flow controllers specifically designed for each inhalation system Specifications subject to change without notice Copyright © 2014 TSE Systems International Group - All rights reserved www.TSE-Systems.com [email protected]