DualGas D251M for LCMS Grade Nitrogen and Dry Air

The DualGas D251M from Proton OnSite produces LCMS grade nitrogen and dry air using nitrogen separation membrane technology. The mechanism is load following and automatically adjusts in order to match demand.


The key features of the DualGas D251M are as follows:

  • System senses demand and alters production rate
  • Quiet operation
  • Low maintenance


The technical specifications of DualGas D251M are provided below:

Technologies Employed Nitrogen Separation Membrane
Flow Rate1
Dry Air
Max 25 SLPM Combined
Max 24.4 SLPM
Max 25 SLPM
Output Pressure
Dry Air

0 to 7.6 barg / 0 to 110 psig
0 to 6.9 barg / 0 to 100 psig
Phthalates Constructed with phthalate free materials
Air Compressor Yes
Ambient Operating Temperature 60 °F to 95 °F / 15 °C to 35 °C
Electrical Supply2 230 VAC ± 10%, 50/60 Hz
Ambient Humidity ≤ 70% RH, non-condensing
Max Altitude 2000 m / 6560 ft above sea level
Unit Dimensions (H x D x W) 31” x 27” x 20”
79 cm x 69 cm x 51 cm
Unit Weight < 210 lbs / 96 kg
  Maintenance Reminder
  Touch Screen Display
  Equipped with Wheels
  CE, IEC/UL/CSA 61010-1

1 Measured at standard conditions: 21.1°C, 1 Atmosphere
2 Voltage Step Up Transformer available upon request
* Organic compounds in the ambient air will negatively affect performance.


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