to the rod. The charge transferred is almost proportional to the number of contacts i.e. to the mass of particles in the stream. Of course, the intensity of the transfer is infl uenced by the velocity with which the particles pass by and also by the size of the particles. (Pic 3)
Pic 3. Triboelectric Measuring Principle
advanced solutions for Gas Analysis and Fluid Control, took up the challenge. Based on the comprehensive experience gained in over 45 years in the fi eld of cartridge fi lter technology, the target for the development of dust fi lter monitors was set for a unit which is affordable even for owners of small dust fi lters, based on reliable technology, easy to install and providing just enough information for the operator to run his unit effi ciently and cost effectively while the investment for purchase and implementation should be moderate.
The Technology:
Every particle carried in a gas stream is electrically charged simply by its motion within the stream. If the particle collides with a conductive metal rod, its charge will be discharged to the rod and led to zero. This also happens if the particles come very close
In the case of dust fi lter monitoring, the latter parameters become less important. This is because, fi rstly, particles passing through a fi lter matrix are fairly uniform and small (even in the event of fi lter failure) and secondly the fl ow through a fi lter installation does not normally fl uctuate, and last but not least: it is absolutely suffi cient to detect deviations from pre-set levels and their development over time rather than measuring a certain mass of dust particulates downstream from the fi lter element.
The electrical charge discharged is transferred via the rod to an electronic transducer which consequently forms the relevant signals.
The Product:
Bühler Technologies has launched the BDA 02 series, a monitor specifi cally designed to detect the residual dust particles down stream of dust fi lter elements. (Pic 4)
Placed into exhaust pipes with fl ow rates around and above 3 m/s the BDA will detect and display small leakages and short dust slips. A 2,5” graphic screen displays continuously the residual dust level present in the exhaust air. Appropriate alarms can be set with enough reserve to keep the emissions under a desired or recommended level. The BDA 02 can even sort out the fi lter row in which a faulty element may be found if the signal peak is correlated with the blow back sequencer. If necessary, the unit
Author Contact Details Mr. Gerd Biller. Bühler Technologies GmbH • Harkortstr. 29, 40880 Ratingen, Germany Tel: +49 (0) 2102 49890 • Email:
info@buehler-technologies.com • Web:
www.buehler-technologies.com
Pic 4. Real-time Filtermonitor BDA 02
can be calibrated in mg/ Nm (cubic metres) if respective isokinetic samples have been drawn.
The standard version of the BDA 02 comes with the 1” Easyjust installation set and cable glances. TriClamp or fl ange mounting is optional. The power supply is also optional 115/ 230V AC or 24V DC. The units are self- checking and provide respective alarm out puts.
The BDA 02 Ex version is available with 24V DC supply only and is suitable for applications in hazardous areas zone 2/ 22. ATEX classifi cation: EX II 1/3 D Ex ia/tc T7°C Da/ Dc and Ex II 3G Ex ic nA II T4 Gc.
The BDA instruments are dedicated to cater for applications where the operators are focussed on a cost effective, reliable and trouble free operation of fabric dust collectors.
Air Flow Probe with Modbus Interface
The EE671 compact air fl ow probe from E+E Elektronik measures air velocity up to 20 m/s (4000 ft/m) and is ideal for HVAC applications. The new version with Modbus RTU interface facilitates the EE761 integration into modern building automation systems.
The EE671 probe is dedicated for reliable air fl ow measurement in heating and ventilation systems. It features the new E+E VTQ thin-fi lm fl ow sensing element. Due to innovative transfer molding, the sensing element is very robust and highly insensitive to contamination, which allows accurate and long-term stable measurements even under harsh conditions.
The probe is available with fi xed cable or M12 connector. The alignment strip and the matching mounting fl ange allow for easy installation and precise positioning of the EE671 in the ventilation duct. The sensing head design is optimised for low angle dependency.
output 0-1 V, 0-5 V or 0-10V. An optional confi guration kit makes it easy to scale the output, set the Modbus parameters and perform the adjustment of EE671.
For More Info, email: email:
Continuous Formaldehyde Detection Down to 1 ppb Made Easy
For More Info, email: email:
In’ air Solutions have introduced their compact, accurate and highly user friendly formaldehyde detector for indoor and outdoor air monitoring, along with a host of other applications.
This lightweight unit is simple to set up, calibrate and operate, maintenance costs and time is minimal due to the instruments’ fi lter’s long lifespan. The smart, embedded programmable software offers results in near to real time, a colour touch screen with standard and ‘expert’ user modes. The instrument makes effi cient data processing a simple task.
In’ air’s reliable and sensitive instrument can achieve detection limits of less than 1ppb or 1.2 ûg m3, with both gaseous or aqueous formaldehyde concentrations with a high level of selectivity and no interference.
In’ air developed this highly innovative, patented microfl uidic device in collaboration with CNRA and Strasbourg University, with backing from the EU and Innovation Programs Support.
For More Info, email: email:
For More Info, email: email:
41491pr@reply-direct.com 41458pr@reply-direct.com BTEX In addition to the Modbus version, the EE671 is also available with voltage Online Gas Analyzer Experts
ODORS & AIR MONITORING EXPERTISE IN ONLINE GC
MONITORING UP TO 123 COMPOUNDS WITH ACCURACY IN INDUSTRIAL AREAS
VOCs SOLVENTS DIOXINS PRECURSORS OVOCS
Suitable for each type of environment
Industrial or urban atmospheres Low levels of quantification (ppm/ppb/ppt)
Reliable and stable results with data double check FID & Mass spectrometry (MS) No saturation of detectors with MS technology
Reliable measurement of a large spectrum of compounds in air
20th airmoSCAN Xpert
Turnkey Stand-alone Solution
PITTCON 5th to 9th March 2017 Booth #5216 ARABLAB to 23rd March 2017 Hall S2 - Booth #932
For More Info, email: email:
For More Info, email: email:
www.chromatotec.com info@chromatotec.com
7844ad@reply-direct.com www.envirotech-online.com AET Annual Buyers’ Guide 2017 PAH AROMATICS HALOGENATED PCB
HYDRO- CARBONS
PERMANENT GASES
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72
