Key benefits:
• Improves baseline stability and reduces noise
• Improves pump performance _ fewer bubbles‚ less cavitation
• Improves laboratory safety _ no escape of solvent vapours to the atmosphere
• Prevents bubble formation in detectors and solvent mixing systems
• Does not cause mixed solvent depletion
• Uses only mains power _ no need for high pressure gas supplies or cylinder

Why you need a degasser:
It is important to degas solvents in HPLC‚ to reduce bubble formationwhen solvents are mixed and also to increase sensitivity and reducebaseline noise‚ particularly at low UV wavelengths. Although this canbe done by bubbling helium through the solvents‚ this is expensive andresults in the need to check and change cylinders. Helium degassing canalso introduce unwanted environmental pollution into the laboratoryatmosphere.

How it works:
On-line degassing has been shown to be the more effective at removingdissolved gas from mobile phases than sonication or helium-sparging. Upto five solvent lines can be degassed simultaneously by one unit. Theextremely low volume of each Teflon® AF channel (480 _l) offers veryquickly equilibration and very short start-up times.

Teflon® AF is 50x more permeable than Teflon® PTFE
The new Teflon® AF membrane outperforms the older Teflon® PTFEmembranes used in many other degassing systems today. This translatesinto the ability to use shorter tubing for removal of dissolved gasses.

• Considerably shorter equilibration / re-equilibration times
• Very easy to prime
• Short vacuum pull-down times‚ typically 3 minutes
• Teflon® AF has the ability to remove pre-pump bubbles formed bycavitation vs bubbles formed by off-the-floor eluent reservoirs areless of a reliability issue


Vacuum pump technology
These HPLC solvent degassers feature the ZHCR® (Zero HysteresisConstant Run) stepper motor driven vacuum pump‚ specifically designedand developed for membrane degassing of HPLC mobile phase.

This permits the pump to maintain a constant vacuum level set-point (50mmHg) by varying the RPM of the stepper motor. The pump initially runsat a high speed which provides for a quick pull-down and‚ as itapproaches the vacuum control point‚ the RPM is gradually reduced untilthe desired vacuum level is reached.

This patented control strategy allows the solvent degasser to maintaina virtually constant vacuum that is unaffected by varying degassingloads. As a consequence‚ fluctuations in baseline due to vacuumhysteresis are eliminated by not having the pump repeatedly stop andstart as is done in many older and existing systems.

Specifications
Number of Channels: 2‚ 3‚ 4 or 5
Internal Channel Volume: 480_l
Wetted Parts: PEEK and Teflon® AF
Vacuum Source: Patented Zero Hysteresis Constant Run vacuum pump
Physical Characteristics
Dimensions (W x H x D): 73 x 127 x 249mm
Weight: 2.7kg
Power: 15-24 VDC (0.85A max‚ 0.5A typical). Universal mains AC adaptor included.