12 Air Monitoring
Monitoring Oxygen Content in Harsh Industrial Environments
Oxygen monitoring is mandatory in many production areas, whether as an economical way to control processes or in order to efficiently identify hazards.
Be prepared with the TRANSIC100LP from SICK (Germany) to measure the oxygen concentration in moist and aggressive process gases precisely with diode laser technology. It is reliable in all operational areas and with minimal maintenance and at an attractive price.
Measuring oxygen with the TRANSIC100LP is a breeze. The meter is compact, requires little space and can be easily installed directly in-situ in many applications even in hazardous areas. The operation is easy. Once powered up, the measurement values are immediately available. Typical applications include monitoring gas production and inert gas atmospheres.
The stainless steel probe is resistant to aggressive chemicals and extreme humidity. In summary, the TRANSIC100LP is a simple, robust solution
with accurate high availability. The probe consists of a compact spectrometer with tunable diode laser (TDL). The laser is tuned to a wavelength characteristic of oxygen molecules. The measurement is made by the attenuation of the laser light passing through the measuring medium.
The measured attenuation allows a very selective detection of oxygen within the sensor beam. This non-contact optical measurement technology provides an exceptionally stable and reliable measurement.
Maintenance costs are low. The semiconductor lasers have been subjected to extensive aging tests to provide an average service life of upwards to 10 years in continuous operation. This significantly reduces operating costs for oxygen measurements, since sensor changes are very rarely required.
A stainless steel mesh filter and an optional porous PTFE filter protect the optical components in the probe from dust and dirt. An intelligent measurement algorithm helps in the process to minimise pollution effects and reports required maintenance before it is needed. On-site checks and calibration of the transmitter can either be done with ambient air or, with zero or calibration gases, which are fed via an optional calibration gas. The calibration interval is 12 months.
Reader Reply Card No. 31
New Range of Pressure Regulators Launched
Speciality gas supplier CryoService (UK) has recently launched a new range of pressure regulators, specifically designed for the critical demands of high purity gases and calibration gases.
The all-new Scientific range includes the twin stage “Exact” regulator models, which feature innovative technology that provides twin stage performance with the lightweight compact design and fast response of a single stage regulator.
In addition the new SpectroCOM auto-changeover manifold is ideally suited to FID fuel supply – providing a continuous supply of gas to your CEMS installation, with the option of 4-20 mA signal outputs that can inform your CEMS software when a changeover occurs. CryoService can also install and maintain your changeover system for you if needed.
Reader Reply Card No. 32
Rapid Measurement of Low-level Temperature Inversions
Predictions of urban climate, atmospheric dispersion calculations for pollutants, and forecasting of “smog” conditions all depend on the knowledge of the vertical profile of the air temperature. Especially during night, the convective boundary layer may settle for a temperature inversion, where the temperature is increasing with altitude. Such conditions generate a stable layer of air with no turbulent mixing, which is virtually trapping all pollutants close to the surface.
RPG Radiometer Physics (Germany) has successfully developed, tested and deployed microwave profiling radiometers which can measure the temperature profile by passive remote sensing techniques with a three-minute repetition rate. The used technology is basically molecular spectroscopy on oxygen and water vapour molecules in the 20 GHz to 60 GHz region. The precision at up to 1000m is better than a weather balloon’s and comparable above. The system has demonstrated its performance in all climate conditions,
from Arctic to tropical, in ships and 5500m above sea level. Reader Reply Card No. 33
Apex Instruments (USA) offers multiple configurations of dual-stream, mercury sorbent trap monitoring systems designed for measuring vapor phase mercury emissions from stationary sources.
Miniature Formaldehyde Sensor Gains World-Wide Acceptance in Many Applications
The Dart Sensors Ltd formaldehyde sensor, which has been under continuous improvement over several years, is at the heart of a number of recent product launches, with many more expected soon. Key features include; high sensitivity, low cross-sensitivities (particularly CO), and low sensor baseline offset, permitting continuous measurements down to 0.03 ppm HCHO.
Applications under development or in production include; (i.) Handheld monitor, (ii.) Sub-miniature personal monitor, (iii.) Free-standing tabletop domestic device, (iv.) Air cleaner and (v.) Air conditioning equipment
The sensor is of the diffusion type, and is available in premium (high exposure) or economy versions. It can be specified with a contact pcb (as in the picture), or with wire contacts for direct soldering to the customer’s pcb.
Calibration: obtaining a valid formaldehyde calibration standard is neither simple nor cheap. Dart Sensors Ltd give guidance, and for customers in China, they will shortly set up a formaldehyde calibration gas stream at their Shenzhen office.
Reader Reply Card No. 34
The XC-6000EPC meter console is fully automated and designed for continuous sampling of emissions from power plants, cement kilns, waste incinerators and crematoriums.
The new XC-30B MercSampler Console is designed specifically for performing Method 30B, RATA’s or short runs.
Either system can be operated with your choice of Apex probes, heated sample gas transfer lines, and our popular Gas Conditioners to remove moisture and scrub corrosives out of the sample stream before entering the gas volume metering system.
Both models simplify operation and improve measurement reliability by automating system configuration, calculations, data acquisition, sample flow adjustments, temperature control, and all quality control procedures. On board data storage is accessed easily via Ethernet, LAN, WAN, USB or optional wireless interface.
Quarterly audits are a snap with the Apex Instruments AK- 6000 Audit Kit offering a secondary reference dry gas meter with optical encoder, digital quadrature totaliser, handheld digital barometer, thermocouple simulator, and accessories.
Reader Reply Card No. 35
Mercury Sorbent Trap Monitoring System
AET October / November 2011 www.envirotech-online.com
| 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