The Thermo Scientific High Volume Air Sampler, VFC-TSP is a volumetric flow controlled system for total suspended particulate (TSP) measurement.
Product Detail
Utilizes a volumetric flow controlled system for sampling large volumes of air for the collection of total suspended particulate matter (TSP).
The VFC-TSP Sampler is supported by a protective shelter ensuring that the surface of the filter rests in a horizontal position. This aerodynamic design allows for the collection of particles at 100 micrometers and less.
The flow controlled principle, when applied to a high volume air sampler, incorporates a smooth-wall Venturi orifice that gradually opens to a recovery section. The vacuum, which is provided by a motor downstream of the Venturi, is capable of recovering over 95% of energy lost in differential pressures across the restricting orifice as compared to other high volume air samplers.
• Designed to meet US EPA reference method for determination
of total suspended particulate (TSP) concentrations
• Well-documented, smooth-wall Venturi orifice
• Aerodynamic design recovers over 95% of energy lost in
differential pressures
• Distinctive "choking" characteristic
• Regulates flow while eliminating moving parts and electronic
components
• The critical flow is achieved once the air velocity of the flow stream
is equal to the acoustic velocity or speed of sound
• All conditions of the Venturi, including the flow rate, are
determined by upstream conditions, provided the downstream
changes remain minimal
• This condition, of downstream restriction thus accelerating air flow
through the Venturi, is a distinctive charactersitic known as
"choking"
• The critical flow through the Venturi orifice, as powered by the
sampler blower motor, is unaffected by filter loading, ambient
temperature or barometric pressure and is capabile of maintaining
a stable, volumetric flow rate
• Amperage: 7.0
• Wattage: 840
• Motor: 1.0 HP
Includes:
• Blow motor assembly
• Filter holder
• Volumetric flow controller
• Timer
• Anodized aluminum shelter
Ideal for:
• State and city networks
• Industry consulting
• Painting of bridges
• Filter based sample collection for lead analysis
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