Aerox 4110-725-002-02-1 Quick-Donning Diluter Demand Mask – Medium, 48" Hose, -1 PB1 Fitting
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The Aerox 4110-725-002-02-1 Quick-Donning Diluter Demand Mask is a premium aviation oxygen mask built for demanding, high-altitude flight operations. Designed to meet stringent FAA requirements and approved under TSO C89A and TSO C78A, this mask ensures reliable performance and superior comfort for pilots and crew flying at altitudes up to 40,000 feet. Whether you're navigating long cross-country routes in a pressurized aircraft or preparing for potential cabin depressurization, this quick-donning mask is a critical component of any aviation oxygen system.
With its intuitive one-handed donning design, soft silicone facepiece, and rugged carbon fiber shell, this pilot oxygen mask balances comfort, safety, and ease of use. The integrated microphone keeps communication clear under pressure, and multiple fitting and hose options allow seamless integration with a wide range of general aviation and turbine aircraft.
Key Features
- Designed and certified for use up to 40,000 feet, meeting TSO C89A and C78A standards for aviation oxygen systems.
- Inflatable quick-donning harness allows pilots to deploy the mask in seconds using one hand—perfect for emergency situations.
- Lightweight carbon fiber shell and silicone facepiece combine durability with all-day wearing comfort.
- Electret microphone is built in for reliable cockpit communication without external equipment.
- Medium size harness provides a comfortable and secure fit for most users.
- Includes a 48" inlet hose to accommodate a variety of cockpit configurations.
- Compatible with PB1 (Puritan 750), PB2 (Puritan 566), and Scott oxygen fittings to support diverse aircraft setups.
- Optional accessories like the Aerox Carbon Fiber Stowage Cup (4110-155) and mask carrying case provide added convenience and protection.
Built for general aviation, turbine aircraft, and jet operators, the Aerox 4110-725-002-02-1 Quick-Donning Diluter Demand Mask is the trusted choice for flight crews who demand performance and safety from their aviation oxygen equipment. Whether you’re preparing for an international trip or equipping your aircraft with FAA-compliant emergency oxygen gear, this mask delivers unmatched readiness and reliability.
| General Information | |
|---|---|
| Part # | 4110-725-002-02-1 |
| Manufacturer | Aerox |
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AIRCRAFT COMPATIBILITY
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QUESTIONS & ANSWERS
The Aerox 4110-725-002-02-1 mask provides pilots and crew members with a secure and efficient oxygen supply during high-altitude or emergency operations. It combines a carbon-fiber facepiece, diluter-demand regulator, and inflatable head harness that allows quick donning – typically in under five seconds – when paired with the Aerox 4110-155 stowage cup. This makes it an essential component of any aircraft’s emergency oxygen system, providing rapid response and comfort in the event of pressurization failures.
The inflatable head harness design enables the mask to be donned with one hand in less than five seconds when used with the Aerox stowage cup (4110-155). This rapid-deployment capability ensures that crew members can restore oxygen flow immediately after a decompression event, meeting FAA TSO requirements for time-critical safety equipment.
This Aerox diluter-demand mask is certified for operation up to 40,000 feet MSL, providing reliable performance throughout the flight envelope of most pressurized aircraft. Its regulator automatically adjusts the oxygen concentration based on cabin altitude, ensuring crew members maintain safe oxygen levels during climb, cruise, or emergency descent.
Aerox offers several connector options to match different aircraft oxygen outlets. The 4110-725-002-02-1 model features a PB2-style fitting (4110-420), which mates with Aerox PB2 outlets (36728-01 and 802959-01), EROS DPB Series outlets, and select B/E Aerospace ports. Other variants in the 4110-725 series are available with PB1 and Scott connections for broader compatibility.
Aerox recommends overhauling the quick-donning diluter demand mask every three years to maintain performance and safety certification. Regular inspections should include checking the harness inflation, microphone operation, and regulator response. Proper maintenance ensures the mask remains compliant with FAA TSO-C78a and TSO-C89a standards.
Yes. The Aerox 4110-725-002-02-1 operates effectively within a temperature range of 20°F to 120°F (-29°C to 49°C) and in relative humidity levels ranging from 5% to 95%. However, if the aircraft is exposed to prolonged cold conditions, Aerox advises storing the mask in a warm, dry location to preserve the harness and regulator components.
The Aerox 4110-725-002-02-1 requires aviation-grade oxygen (MIL-O-27210) supplied at 55 to 70 PSI (0.37 to 0.48 MPa) and a minimum flow of 100 liters per minute (NTPD). Maintaining this pressure and flow ensures consistent regulator performance and safe oxygen delivery during all phases of flight.
The 4110-725-002-02-1 is the medium-size mask, fitted with a 48” inlet hose for flexible crew mobility in cockpit environments. The medium size is Aerox’s most commonly stocked option, providing a secure, comfortable fit for most adult users.
Yes. Each Aerox 4110-725 series mask features a built-in electret microphone with a PJ068 plug, allowing seamless integration with most aircraft intercom systems. This ensures clear voice communication even while the mask is fully sealed and operational at altitude.
The mask’s combination of rapid deployment, lightweight carbon-fiber construction, and compatibility with multiple oxygen systems makes it a go-to choice for general, corporate, and military aviation applications. Its FAA-approved design ensures compliance, while the integrated diluter-demand regulator conserves oxygen and maintains crew safety in pressurized flight. Aerox’s three-decade heritage in aviation oxygen systems reinforces its reliability across diverse fleets.
