The SM200 is an automatic particulate monitor for monitoring of PM10 and PM2.5. A filter is loaded into the filter magazine and a Geiger counter detects the beta attenuation before and after sampling. The response time of the instrument is 1–24 hours.
Fo those who would like data resolution down to less than 1 hour, the optional RTPM (real-time particulate module) uses a laser nepthalometer system to measure concentration levels down to 1-minute resolution. The RTPM is a small additional unit installed between the PM inlet head and the SM200 monitor.
The particulate matter monitor SM 200 can be used for both automatic measurement and filter sampling. Thee SM 200 can be equipped with a PM10 head or a PM2.5 head, designed for either 2.3 m3/h or 1.0 m3/h.
The SM 200 is a cost-effective solution for particulate matter monitoring and sampling. It can be completely remote controlled and is ideally suited for use in modern monitoring stations.
The SM 200 can generate both 24-hour data based on beta attenuation and real time data based on differential pressure measurements. Due to the extensive automatic QA/QC procedures, the SM 200 operates with high accuracy and precision.
The SM 200 meets the new regulation for automatic monitoring of PM10 and PM2.5. It also meets the new regulation for particulate matter sampling on filter membranes for further analysis of cadmium, nickel, PAH and other substances.
Monitoring and Sampling
The SM 200 provides both automatic monitoring of particulate matter as well as sampling of air on membrane filters. Standard 47 mm membrane filters are used.
The SM 200 is an automatic particulate monitor for monitoring of PM10 and PM2.5. A filter is loaded into the filter magazine and a Geiger counter detects the beta attenuation before and after sampling. Thee response time of the instrument is 1–24 hours.
Real Time Measurements
The SM 200 can generate real time data by using differential pressure measurements. Hourly mass concentration values are presented based on the pressure drop over the filter during sampling. This gives a good estimate of the actual mass concentration.
The differantial pressure measurement is calibrated daily, using the results from the beta attenuation.
Span, linearity and zero calibrations are automatically controlled at regular intervals.
TS 200 – Temperature Stabilized Inlet Tube
TheTS 200 is used for keeping the sample air at ambient temperature. Since the temperature of the sample is controlled, no factors have to be added to the measurement results. This means that the SM 200 always provides accurate results, unaffected by both seasonal and geographical factors. The TS 200 is available as an option and has to be ordered separately.
The 47 mm filters can be weighed according to gravimetric reference methods. The results can be used for quality control of the automatic measurements.
Extensive QA/QC procedures regulate the operation of the SM 200 by use of internal sensors such as:
Serial Communication – Remote Control
The instrument is equipped with three RS 232 serial ports that can be used for connecting the SM 200 to a PC, modem or data logger. By using the serial ports, the SM 200 can be remotely controlled, which means that data retrieval and other operations can be performed at distance. The SM 200 is ideally suited for use in a monitoring network.
Radioactive Source Data
SM 200 Includes as Standard