JUNIOR II
Mobile 100 l/min unit for breathing air applications up to 330 bar
- 100 l/min
- 90 – 330 bar
- Available with three-phase, single-phase, or gasoline engine
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- JUNIORII
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Quality & Innovation
Certified Breathing Air Quality
The BAUER JUNIOR II delivers independently tested and accredited breathing air quality that not only meets but exceeds international standards such as EN 12021:2014, CGA/ANSI Grade E, and other relevant norms – ensuring maximum safety for every application.
Intelligent Maintenance Monitoring
The B-TIMER records operating hours and maintenance intervals, monitors filter cartridge saturation and precisely calculates the optimal replacement time. For maximum safety, outstanding cost efficiency and consistently superior breathing air quality.
Long Service Intervals
Thanks to durable components tested to BAUER’s extreme safety standards and a well-engineered design, the BAUER JUNIOR II offers long service intervals that reduce maintenance effort, minimize downtime, and sustainably lower operating costs.
Proven Worldwide
With more than 100,000 installed systems and decades of operation in over 100 countries, the BAUER JUNIOR II represents reliability, quality, and trust worldwide and is valued by professional users in demanding applications.
Multi-Level Safety Concept
Standard safety valves at every compression stage reliably protect both system and operator. This multi-level safety concept ensures permanently safe, controlled, and standards-compliant operation.
Technical Data
JUNIOR II compressor, 90 – 330 bar, 100 l/min, high-pressure compressor for compressing air and breathing air
| Model | Charging rate ¹ | Maximum operating pressure | Drive | Filter system | Net weight | Dimensions (L x W x H) | |
|---|---|---|---|---|---|---|---|
| l/min | bar | Motor | kW | approx. kg | cm | ||
| JUNIOR II-B | 100 | 330 | Petrol engine | 4.2 | P21 | 45 | 79 × 37 × 44 |
| JUNIOR II-E | 100 | 330 | Three-phase motor 400 V, 50 Hz ² | 2.2 | P21 | 49 | 69 × 39 × 44 |
| JUNIOR II-W | 100 | 330 | Single-phase motor 230 V, 50 Hz ² | 2.2 | P21 | 52 | 69 × 40 × 44 |
¹ Measured with cylinder filling from 0 to 200 bar, ±5%
² Option of different voltage/frequency available
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Details & Features
Reliability that sets global standards: with more than 100,000 units sold, the JUNIOR II is a true classic. Optimized cooling and improved belt protection significantly extend the filter service life. Its modern design, lightweight construction, and ease of operation make it the ideal companion for mobile applications such as diving, breathing protection, paintball, or shooting sports.
Compressor block
Our compressor blocks are based on decades of experience and development. An efficient air cooling system with large coolers and finned cylinders ensures optimal cooling. Robust industrial roller bearings, pressure lubrication, and fine oil filters minimize wear. Dynamically balanced drive units ensure smooth operation and long maintenance intervals.
P 21 filter system
The integrated P 21 filter system with oil and water separator as well as pressure-retaining non-return valve ensures reliable breathing air in accordance with DIN EN 12021¹ when using original BAUER filter cartridges. A type-tested, sealed final pressure safety valve ensures maximum operational safety. The processable air volume is 140 m³.¹ Applies when properly maintained and installed, and if CO₂ limits in accordance with the standard are not exceeded.
B-TIMER filter cartridge monitoring
The unique B-TIMER minicomputer displays the operating hours and the current filter cartridge saturation in real time. A prominent blinking signal indicates when a cartridge change is due – including the corresponding order number. This ensures the filter capacity can always be used optimally.
Filling device
The filling device consists of a flexible "UNIMAM" high-pressure filling hose and a filling valve with a final pressure gauge. The gauge allows easy reading of the filling pressure and is reliably protected against damage by a robust rubber coating.
Filling hose
The high-quality UNIMAM high-pressure filling hoses are made of food-grade, durable material and provide maximum flexibility during handling. Swiveling hose connections allow for quick, easy, and safe connection of the filling valve to the breathing air cylinder.
Optionen
Changeover device PN 300/200 bar
The PN 300/200 bar changeover device allows filling of cylinders with different operating pressures.
Automatic condensate drain with auto shut-off at final pressure
The automatic condensate drain empties the intermediate and final separators automatically during operation and shutdown – for greater convenience and less effort. In addition, the compressor shuts down automatically at final pressure. For maximum safety, all electrically driven models are built according to DIN EN 60204 and feature a compact control system with control transformer – CE-compliant and operationally safe.
Stainless steel base frame and carrying handle
The stainless steel design provides optimal protection against corrosion and is ideal for use in tropical climates as well as on ships.
Additional filling device PN 200 or PN 300 bar
An existing filling connection can optionally be expanded by one or more additional connections with filling hoses of variable length.
Trolley set
The trolley set enables safe transport of the compressor over various terrains. Large pneumatic wheels and a stable mount ensure secure positioning. The compressor can be operated directly on the trolley or removed as needed – locked or released easily by turning the handle. The drawbar is length-adjustable for ergonomic handling and can be detached for space-saving transport in a car.
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Downloads
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Product Video
BAUER JUNIOR II & OCEANUS – mobile performance
Frequently Asked Questions
Why is BAUER the right partner for industrial compressor solutions?
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End-to-end system expertise from a single source: BAUER covers the entire process chain, including compression, air and gas treatment, quality monitoring, and audit proof documentation from a single source.
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Most comprehensive options and accessories portfolio: BAUER offers the broadest range of options and accessories in the industry, precisely tailored to each application without the need for custom engineered solutions.
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Most extensive breathing air treatment portfolio: From separators, purification systems and regeneration dryers to refrigeration dryers, BAUER covers all purity requirements for breathing air applications.
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Global market leadership and service expertise: In the high pressure segment, BAUER is the worldwide market standard across nearly all industries, with a 70 percent market share in breathing air supply, supported by a global service network.
What is the JUNIOR II used for?
The JUNIOR II is a mobile high-pressure breathing air compressor that delivers reliable breathing air supply for flexible use at different locations. It is built for demanding conditions where mobility and operational safety are essential.
What performance ranges does the JUNIOR II cover?
The JUNIOR II is designed for final pressures of up to 330 bar and can deliver up to 100 liters per minute. This makes it ideal for filling breathing air cylinders in mobile applications.
How is the JUNIOR II powered?
The JUNIOR II is available with a single-phase motor, three-phase motor, or petrol engine, and is built for reliable operation in each configuration.
How portable is the JUNIOR II?
Thanks to its compact design and mobility, the JUNIOR II is especially suited for use at multiple locations.
How maintenance-friendly is the JUNIOR II?
The JUNIOR II is engineered for low-maintenance operation. Its sturdy build and easily accessible components make maintenance quick and easy.
On Expedition with JUNIOR II in Norway
The JUNIOR then went on tour to Norway: A long planned, six-person diving team expedition from the tech magazine “Wetnotes.”
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BAUER supplies breathing air for a research diving expedition in the South Seas
In November 2021 a team of research divers from SUBMARIS, a company based in Kiel, North Germany, set out on a journey that would take them halfway around the world.
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With JUNIOR II on big tour
Marianne and Rudolf Seifert live a special life: freedom, adventure, and traveling to distant countries has been their everyday lives for decades.
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DIVING – A SCHOOL FOR LIFE
In January 2013 Viola and Joachim Sperling took the stage to claim the “TAUCHEN Award” for the exceptional dedication they showed in the “Tauchen im Schulsportunterricht” (School Sports Scuba Diving) project.
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