DGA Permeation Loop Accessory
69
        • For extracting & preconcentrating dissolved gases in liquid samples
        • Built-in standards preparation module - make your own standards
        • Requires a valve oven & one or two 10 port gas sampling valves
The Permeation Loop consists of permation membrane tubing encapsulated in a trap-heated glass tube. When sample liquid is pumped through the permeation tubing, the dissolved gases therein selectively permeate through the heated membrane into the surrounding extraction chamber, which is plumbed as the loop of a 10-port gas sampling valve.
The Permeation Loop Accessory includes the permeation trap, two peristaltic pumps, two solenoid valves and a standards preparation sparge head. By reconnecting a few tubing lines, the DGA Permeation Loop Accessory can be configured to prepare dissolved gas standards. A Tedlar bag, or other container, filled with gas standard is connected to the standard pump. The standards preparation vessel is filled with sample liquid, such as water or transformer oil. The standard pump bubbles gas standard into the standards preparation vessel, equilibrating the liquid over time to a known concentration.
8690-0087
 DGA Permeation Loop Accessory (for existing gas valve)
£3,176.00
8690-0065 10-port electrically actuated valve, plumbed & tested
£1,824.00
8690-0088 Thermostatted valve oven, mounted on an 8610C GC
£728.00
10-port gas sampling valve with valve oven required for DGA use, sold separately.
DGA Permeation Loop Accessory
69