Model 701H - High Performance Zero Air System

The regenerative, heatless dryer removes water and produces gas with a dewpoint of less than -25°C (dependant on flowrate). and assists in the removal of other gases, greatly increasing the life of the chemical scrubbers.

The Model 701H includes a high flow rate oil and diaphragm free pump, scrubbers to remove SO2, NO, NO2, O3 and H2S, and high performance scrubbers to remove CO and Hydrocarbons. The 701H also incorporates a dewpoint sensor that warns if the dewpoint exceeds -16°C.

Inlet air is pulled into the pump and routed through a precooler and water trap to remove moisture. The air then passes through the regenerative scrubber for final drying and then to the storage tank.

Tank pressure is monitored and maintained at a preset level by cycling the pump automatically as needed, thereby extending both the pump and scrubber life.

Outlet air then passes through a filter to assure a clean, dry, analytical zero air supply.

A microcontroller cycles the regenerative dryer and water trap valves preventing the pump from starting against full head pressure.

• Standard two year warranty
• Regenerative, heatless dryer for maintenance-free water removal independent of inlet dewpoint
• Long life scrubbers for SO2, NO, NO2, O3, H2S, CO and Hydrocarbons
• Dewpoint sensor/alarm
• Automatic water drain
• Automatic pump control based on flow demand
• Ideal zero air for “trace level” or “ultrasensitive” measurement applications
• May be used to provide combustion air for FID
• Source of purge air for permeation tube ovens
• Zero air for Ozone Generators

• Output: 30 SLPM @ 35 psig
• Dewpoint: -40°C ≤ 30 LPM (typ.@60Hz)
• Dryer: Regenerative heatless dryer with lifetime of greater than 5 years
• Output concentrations (maximum)
  • SO2 < 0.025 ppb
  • NO < 0.025 ppb
  • NO2 < 0.025 ppb
  • O3 < 0.3 ppb
  • CO < 10 ppb
  • Hydrocarbons < 0.25 ppb
• Pump: Internal long-life, oil-less piston pump
• Mounting: Bench type mounting, rack mount optional
• Dimensions (HxWxD): 8.75” (22.2 cm) x 17” (43.2 cm) x 28” (71.12 cm)
• Weight: 69 lbs (31 kg)
• Power requirements: 100V 50/60 Hz, 115V 60 Hz, 220V 50/60 Hz,
• 230V 50 Hz, 240V/50 Hz, 400 Watts
• Approvals: CE