Vac-U-Chamber

Uses Negative Pressure to Avoid Pump Contamination

Features

• Allows direct filling of air sample bags
  • Uses negative pressure provided by most personal air sample pumps
  • Designed to contain SKC sample bags
  
  
• Protects from contamination
  • Sample does not pass through the pump
  • Inert surfaces eliminate sample contamination
  
  
• Rugged heavy-duty construction
  • Will not collapse under vacuum
  
  
• Two sizes available
  • Large for sample volumes up to 8 liters
  • Small for sample volumes up to 1 liter

Vac-U-Chamber Spec. Sheet (PDF)

The SKC Vac-U-Chamber
For Convenient, Reliable Bag Sampling

The SKC Vac-U-Chamber is a rigid air sample box that allows sample bags to be filled directly by using negative pressure provided by most personal air sample pumps. Since the air sample does not pass through the pump, both pump and sample contamination are eliminated. All surfaces in contact with the sample are constructed of inert materials. The Vac-U-Chamber’s rigid walls will not collapse under vacuum conditions.

Multiple Applications

• Stack sampling
• Ventilation studies
• Hazmat testing
• Soil gas sampling
• Groundwater testing
• Ambient or indoor air sampling
• EPA Method 30

Using the Vac-U-Chamber

The Vac-U-Chamber is equipped with three 1/4-inch OD fitting ports for inflating sample bags:

• Sample inlet port for connecting to the sample line or gas source
  
  
• Purge port for purging the air prior to sampling or when preparing the bag for a standard
  
  
• Vacuum port for inflating a bag

An air sample bag is connected to the inside sample inlet port and the chamber is closed, providing an airtight seal. An air sample pump is connected to the outside vacuum outlet port. When activated, the pump evacuates air from inside the chamber. The sample bag inflates as a result of the interior pressure drop. This pneumatic technique allows the air sample to enter the bag directly without passing through the pump, protecting the pump from sample contaminants and the sample from pump contaminants.

Ordering Information        

Large Vac-U-Chamber

Description	Cat. No.
Complete Vac-U-Chamber Kit includes PCXR4 sample pump, single PowerFlex charger with cable, large Vac-U Chamber, and ten 232-939 sample bags 100-240 V	224-4115
Large Vac-U-Chamber only with stainless steel fittings (supplied without pump), suitable for use with 236-004 or 232-939 bags	231-939
8-liter Tedlar Bag with single polypropylene fitting, 12.75 x 18 inches (32.4 x 45.7 cm), for use with large Vac-U-Chamber (Cat. No. 231-939) and included in 224-4115 kit, pk/10	232-939
8-liter FlexFilm Bag with single polypropylene fitting, 12 x 18 inches (30.5 x 45.7 cm), for use with large Vac-U-Chamber (Cat. No. 231-939), pk/10	236-004
Quick Disconnect with tubing for replacement in Cat. No. 231-939	P231941
Teflon tubing, 5/16-inch OD (1/4-inch ID), 10 feet	231-937
Teflon tubing, 5/16-inch OD (1/4-inch ID), 50 feet	231-924

Small Vac-U-Chamber

Description	Cat. No.
Complete Vac-U-Chamber Kit includes PCXR4 sample pump, single PowerFlex charger with cable, small Vac-U-Chamber, and ten 232-01 sample bags 100-40 V	224-4124
Small Vac-U-Chamber only with polypropylene fittings (supplied without pump), suitable for use with 236-001 or 232-01 bags	231-940
1-liter Tedlar Bag with single polypropylene fitting, 7 x 7 inches (17.7 x 17.7 cm), for use with small Vac-U-Chamber (Cat. No. 231-940) and included in 224-4124 kit, pk/10	232-01
1-liter FlexFilm Bag with single polypropylene fitting, 8.25 x 7.25 inches (21 x 18.4 cm), for use with small Vac-U-Chamber (Cat. No. 231-940), pk/10	236-001

The Vac-U-Chamber is available in other sizes and fittings as a custom order. Contact your SKC representative for more information.

Vac-U-Chamber Spec. Sheet (PDF)

Gas Sample Bags Page

Sample Pumps Page

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This page was last modified January 26, 2010