Vac-U-Chamber

Negative Pressure Eliminates Risk of Pump Contamination

Features

• Allows direct filling of air sample bags
  Uses negative pressure provided by most personal air sample pumps
  
  
• Protects sample and pump from contamination
  
  
• Rugged heavy-duty construction
  Will not collapse under vacuum
  
  
• Available in two sizes
  
  • 1 liter
    
  • 10 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 allowing the direct filling of an air sample bag using negative pressure provided by most personal air sampling pumps. When using the Vac-U-Chamber, the air sample directly enters the bag without passing through the pump, thus eliminating the risk of contaminating the pump or sample. The Vac-U-Chamber has rigid walls that will not collapse under vacuum conditions and eliminates possible errors. All surfaces in contact with the sample are constructed of stainless steel or Teflon for inertness.

---

Applications

• Stack sampling
• Ventilation studies
• HazMat testing
• Soil gas sampling
• Groundwater testing
• Ambient or indoor air
• EPA Method 0040

---

Using the Vac-U-Chamber

The Vac-U-Chamber is equipped with three ports (1/4-in OD fittings) for inflating sample bags:

1. Sample inlet port for connecting to the sample line or gas source
   
   
2. Purge port for purging the air prior to taking a sample or when preparing the bag for a standard
   
   
3. Vacuum port (outlet) for inflating the bag

Inside the Vac-U-Chamber, an air sample bag is connected to the sample inlet port and the chamber is closed, providing an airtight seal. Outside the chamber, an air sample pump is connected to the vacuum outlet port. When the pump is activated, it evacuates the air from inside the chamber. The sample bag spontaneously inflates in response to the resulting interior pressure drop. Using the pneumatic technique, the air sample enters the bag directly without passing through the pump. This protects the pump from acquiring contaminants from the sample and protects the sample from picking up contaminants from the pump.

---

Ordering Information        

Description	Cat. No.
10-L Vac-U-Chamber with stainless steel fittings (supplied without pump), suitable for bags up to 10 L	231-939
1-L Vac-U-Chamber with polypropylene fittings (supplied without pump), suitable for bags up to 1 L	231-940
Complete Vac-U-Chamber Kit includes PCXR4 sample pump, single PowerFlex charger with cable, 10-L Vac-U-Chamber, and ten 10-L bags	224-4115
Quick Disconnect with tubing for replacement in Cat. No. 231-939	P231941
Accessories
10-L Tedlar Bag with single polypropylene fitting, 11.75 x 22 in, maximum capacity 10 L for use with 10-L Vac-U-Chamber (Cat. No. 231-939)	232-08
1-L Tedlar Bag with single polypropylene fitting, 7 x 7 in, maximum capacity 1 L for use with 1-L Vac-U-Chamber (Cat. No. 231-940)	232-01
Teflon Tubing, 10 ft, 5/16-in OD (1/4-in ID)	231-937
Teflon Tubing, 50 ft, 5/16-in OD (1/4-in ID)	231-924

Gas Sample Bags

Sample Pumps

---

This page was last modified August 21, 2008