Ambient air quality monitors have been at the heart of OPSIS’ business for the past thirty plus years, and it will be so for many years to come.
OPSIS Open-path System OPSIS AQM systems measure multiple gases in real time over an open path. Using the DOAS (Differential Optical Absorption Spectroscopy) technique, the system is non-contact, with fast response.
One system can be configured to monitor NO, NO2, SO2, O3, BTX, NH3, CO, CO2, HF, H2O, CH4, Hg, HCl, among other gaseous compounds.
OPSIS offers a wide range of shelter models and configurations to guarantee the optimal operation environment for your measurement equipment. We have experience in all environments, from hot and humid, to cold.
PSIS LD500 Analyser is the central unit in the laser diode gas monitoring system. It can house up to four laser diode heads. Each head is a complete laser control and data sampling system.
The laser diode gas analyser provides very fast monitoring of a range of gaseous compounds. Several gases can be monitored and a multiplexer offers several monitoring paths. Typical compounds are carbon monoxide (CO), carbon dioxide (CO2), hydrogen fluoride (HF), ammonia (NH3), oxygen (O2), hydrogen chloride (HCI), water vapour (H2O), and methane (CH4).
The PM10 monitor version of OPSIS’ SM200 particulate monitor provides accurate and reliable automatic measurements of PM10 particulate fraction concentrations in ambient air, as well as sampling of the PM10 particulate fraction for subsequent manual analysis.
To separate the PM10 fraction, a pump drives a well-controlled flow of air through a standardized inlet head at a rate of either 1.0 or 2.3 normalized cubic metres per hour. The sampled air then passes through a 47 mm filter; typically made of Teflon but it can also be made of glass fibre or cellulose. During the sampling process, the particles are accumulated on the filter. Finally, after sampling, the weight of the particles collected on the filter is measured using the well-known beta attenuation method. The weight combined with the total volume of air passing the filter during sampling gives the average particulate concentration during the sampling period. The filters are preserved after sampling, allowing subsequent analysis of the specific composition of the particulate matter, typically revealing information about air-borne cadmium, nickel and other metals.
Quality assurance and quality control is an integral part of the SM200 design. It is applied automatically and secures reliable monitoring results with high accuracy and precision. The robust design of the instrument and track records from many years of practical operation in challenging environments, both with respect to temperature and particulate concentrations, vouch for trouble-free use with only a minimum of maintenance required.
The SM200 instrument is often combined with OPSIS gas analysers and other sensors to form a complete ambient air quality monitoring station, but it can also be used stand-alone on its own merits. Versatile communication options allow easy system integration and accurate data extraction and remote supervision of the instrument.
The PM10 monitor is just one version of the SM200 instrument. It also exists in versions for PM2.5 monitoring, for stability monitoring, and as a pure particulate sampler.
The SM200 instrument meets new regulations on dust sampling on filter membranes for further analysis. The OPSIS PM10 monitor has been tested and approved by a number of internationally recognized institutes and authorities, such as U.S. EPA, German TÜV and British MCERTS.
The PM2.5 monitor version of OPSIS’ SM200 particulate monitor offers accurate and reliable automatic measurements of PM2.5 particulate fraction concentrations in ambient air, and sampling of the PM2.5 particulate fraction for later manual analysis.
The SM200 instrument utilizes a standardized inlet head which can be operated at a flow rate of either 1.0 or 2.3 normalized cubic metres per hour. The sampled air is forced through a 47 mm filter; typically made of Teflon but it can also be made of cellulose or glass fibre. During the sampling process, the particles are accumulated on the filter. After sampling, the amount of particles collected on the filter is measured using the beta attenuation method. This and knowledge about the air flow which is accurately monitored and controlled then yields the average particulate concentration during the sampling period. Used filters are preserved and can retroactively also be analysed for specific particulate pollutants such as air-borne cadmium, nickel and other metals.
The instrument provides several communication options for simple system integration, and can be remotely supervised. The instrument can be used stand-alone on its own merits, but is often combined with OPSIS gas analysers and other sensors to form a complete ambient air quality monitoring station.
The SM200 instrument has multiple, automatic quality assurance and quality control procedures, securing reliable monitoring results with high accuracy and precision. It’s solid design and many years of successful operation in challenging environments, both with respect to temperature and particulate concentrations, assure trouble-free use with only a minimum of maintenance required.
The PM2.5 monitor is just one version of the SM200 instrument. It also exists in versions for PM10 monitoring, for stability monitoring, and as a pure particulate sampler.
The SM200 instrument meets new regulations on dust sampling on filter membranes for further analysis. The OPSIS PM2.5 monitor has been tested and approved by a number of internationally recognized institutes and authorities, such as U.S. EPA, German TÜV and British MCERTS.
The hardware of the DL256 is based on modules. It is therefore easy to configure the system to meet a wide range of requirements, and the system can be upgraded by adding modules
It can be set up to almost any application including data acquisition with status signals, automatic calibration etc. Communication software for remote access via serial link is included.
Data from DL256 systems can be transferred to the OPSIS EnviMan Air Quality Management System. Together, they form a complete unit for both data acquisition and data management in ambient air quality networks.
The WT256 collects data from OPSIS analysers and data loggers and pushes the data via FileTransfer Protocoll (FTP) or via file copy to a temporary storage site on a TCP/IP based network, such as the Internet.
The data is downloaded automatically from the network storage site to one or several users, utilizing a download service installed on the target computer. Once downloaded, further data processing can be done with software for data presentation and reporting.
OPSIS EnviMan is a series of software modules for management of environmental information.
The MS Windows based EnviMan software offers a range of functions for flexible and cost-effective solutions for urban applications.
OPSIS provides a range of auxiliary equipment to the ambient air quality monitoring systems.
Calibration Equipment
OPSIS Calibration BenchOPSIS offers a range of calibration equipment for use with the air quality monitoring systems. The system is based on the CB100 calibration bench. This is used with an external CA150 lightsource and with an RE060 receiver at each end of the bench itself.
Calibration is carried out by inserting cells with transparent windows into the short light path. Calibration gases are flushed through the cell. A range of cell lengths allows flexible selection of a calibration procedure to suit the system and the compounds it is specified to monitor.
OPSIS Multiplexer
Multiplexers
Multiplexers are used when an OPSIS system includes more than one lightpath. The use of multiplexers allows a single system to handle several lightpaths, with the analyser’s computer automatically interrogating each in turn. Various models are available, depending on the number of required connections.
OPSIS WS515 Wind Sensor
Sensors
OPSIS provides a range of sensors for various applications, such as wind speed, wind direction, temperature, humidity, global radiation, and rainfall. They are specially designed to be easily integrated into an OPSIS monitoring system using OPSIS data logging hardware and software.
Ozone Calibrator
OPSIS Ozone CalibratorOPSIS OC500 ozone calibrator is used to calibrate OPSIS Air Quality Monitoring stations. The calibrator generates a well defined ozone concentration which could be preset by the user. It is designed to generate very high ozone concentrations, sufficient for performing accuracy audit and precision tests.
System Shelters
OPSIS System Shelter OPSIS System Shelters give the optimal operation environment for the measurement equipment. They are designed for OPSIS air quality monitoring systems, used for example for traffic monitoring, and industrial fugitive emissions monitoring. Various container models are available, depending on the application and the extent of the monitoring equipment.
