____________________   >   Aurora   >   System components   >   Airmetrics metric 4.1 minivol portable air sampler pump

Airmetrics metric 4.1 minivol portable air sampler pump


This listing is for an air-sampler system.
* Make: AirMetrics (Air Metrics)
* Series: Mini-Vol (MiniVol)
* Includes all/only items pictured. Please view pictures to make sure everything you want/need is included.
The MiniVol Portable Air Sampler is an ambient air sampler for particulate matter and non-reactive gases. The patented low flow technology used in the MiniVol was developed jointly by the U. S. Environmental Protection Agency (EPA) and the Lane Regional Air Protection Agency in an effort to address the need for portable air pollution sampling technology.
While not a reference method sampler, the MiniVol gives results that closely approximate reference method air quality data. Both accurate and precise, the battery operated, lightweight MiniVol is ideal for sampling at remote sites or areas without power. In addition, the low cost of the sampler allows a network of MiniVols to be deployed at a fraction of the cost for a similar reference station network. The MiniVol features a 7-day programmable timer, a constant flow control system, an elapsed time totalizer, rechargeable battery packs, and all-weather PVC construction. The MiniVol can be configured to sample for just particulate matter, just gases, or both simultaneously.
The MiniVol Portable Air Sampler is basically a pump controlled by a programmable timer which can be set to make up to six "runs" within 24 hours or throughout a week. When used outdoors it may be hung from a bracket mounted on a variety of structures utility poles, trees, fence posts, etc. The sampler is equipped to operate from either AC or DC power sources. In the DC operational mode, the sampler operates from a battery pack, thus making the sampling site independent of line power. In the AC mode the battery pack is connected to line power and mated to the sampler unit. This configuration charges the battery while using AC power. The MiniVol comes with two battery packs to accomplish continuous field sampling. A charged battery pack is capable of operating the sampler for up to 24 sampling hours on a single charge.
The sampler is equipped with two "fault circuits":
* A low battery circuit automatically shuts the sampler down should the rechargeable lead-acid battery fail to supply sufficient voltage (above 10.3 volts) to the pump. This feature protects the battery which could be damaged if used continuously at low voltage. A "low-battery" indicator lights to alert the operator of this condition.
* A low flow circuit monitors the flow rate. Should excessive accumulation of particulate matter or some restriction in the tubing cause the air flow to fall below approximately 10% of the set flow rate, the sampler shuts down and a "low flow" indicator lights to alert the operator.
An Elapsed Time Totalizer linked in parallel with the pump records the total time in hours of pump operation.
PARTICULATE MATTER SAMPLING MODE - In the particulate matter (PM) sampling mode, air is drawn through a particle size separator and then through a filter medium. Particle size separation is achieved by impaction. Critical to the collection of the correct particle size is the correct flow rate through the impactor. For the MiniVol, the actual volumetric flow rate must be 5 liters per minute (5 lpm) at ambient conditions. To assure a constant 5 lpm flow rate through the size separator at differing air temperatures and atmospheric pressures, the sampler must be adjusted for each sampling project.
Impactors are available with a 10 micron cut-point (PM10) and a 2.5 micron cut-point (PM2.5). Operating the sampler without an impactor allows for collection of total suspended particulate matter (TSP).
The inlet tube downstream from the filter takes the air to the twin cylinder diaphragm pump. From the pump, air is forced through a standard flowmeter where it is exhausted to the atmosphere inside the sampler body.
The programmable timer will automatically turn the pump off at the end of a sampling period. The sampler must then be serviced and set up for the next sampling period. Servicing includes removing the sampler from its hanging bracket, removing the filter holder with the exposed filter inside from the sampler, and attaching a new filter holder with a fresh filter. The battery pack is also changed at this time.
For further details, please visit the online manual at http:// /downloads/Manual_V5a_PICS.pdf
This is used and in good condition. It may need minor maintenance and/or proper installation/certification to get it completely operation. But it's otherwise guaranteed to be in proper, working order.