
128199P1S Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $35.99 | Condition is New, Emerson / Liebert 128199P1S 2 Port Differential Air Switch - NIB, FREE SHIPPING | 100.0% |
![]() | $28.00 | Condition is New, New Emerson Liebert 128199P1S Differential Air Pressure Switch 2 Ports A1, shipping cost = $11.00 | 96.3% |
![]() | $35.00 | Condition is New, New Emerson Liebert 128199P1S Differential Air Pressure Switch 2 Ports A1, shipping cost = $14.50 | 99.6% |
![]() | $50.00 | Condition is New, Liebert/emerson 128199P1S SW AIR DIFF 2PORTS, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $199.00 | Condition is New – Open box, Emerson / Liebert 128199P1S SW Air Diffential 2 Ports., FREE SHIPPING | 100.0% |
![]() | $260.00 | Top Pick! Condition is New – Open box, EMERSON 128199P1S / 128199P1S (NEW IN BOX), shipping cost = $12.90 | 99.7% |

The Emerson 128199P1S Liebert/Emerson SW Air 2-Port Switching Unit is a versatile and efficient solution for managing power distribution in data centers and other critical applications. This compact and lightweight unit is designed for use with Emerson's SW series power distribution units (PDUs), providing an additional 2 ports for power outlets.
The SW Air 2-Port Switching Unit is built with high-quality components, ensuring reliable performance and long-lasting durability. It features two independently controlled, mechanically interlocked, and individually fused 600VAC, 20A, 3-phase, 4-wire power outlets. These outlets are designed to accommodate a wide range of equipment, including servers, storage systems, and network devices.
One of the standout features of this switching unit is its air-isolated design, which provides superior electrical isolation and protection against electrical interference. This feature is especially important in data centers, where sensitive electronic equipment can be susceptible to electromagnetic interference (EMI) and radio frequency interference (RFI).
Another notable feature is the unit's ease of installation and integration with existing PDUs. It can be installed in just a few simple steps, with no need for additional wiring or mounting hardware. The unit also comes with a clear and intuitive front panel display, which provides real-time status information on the power outlets and helps to simplify maintenance and troubleshooting.
The SW Air 2-Port Switching Unit also offers several security features to help protect against unauthorized access and power theft. It includes a secure locking mechanism and a tamper-evident seal, which can help to deter potential intruders and ensure that the power distribution remains secure.
Overall, the Emerson 128199P1S Liebert/Emerson SW Air 2-Port Switching Unit is an excellent choice for data centers and other critical applications where reliable and efficient power management is essential. With its air-isolated design, easy installation, and robust security features, this switching unit is sure to meet the demands of even the most demanding environments.
The Emerson 128199P1S Liebert/Emerson SW Air 2 Ports is a compact, efficient, and reliable backup power solution designed for various applications, particularly server rooms and data centers. Like any other product, it has its advantages and disadvantages.
Advantages:1. High Efficiency: The SW Air 2 Ports boasts an efficiency of up to 93%, which means less energy waste and lower operating costs.
2. Compact Design: The unit's compact design makes it ideal for small spaces, saving floor space and installation costs.
3. Parallel Redundancy: The 2-port design allows parallel connections, ensuring redundancy and uninterrupted power supply.
4. Easy Installation: The unit is designed for easy installation, reducing installation time and labor costs.
5. User-friendly: The SW Air 2 Ports comes with an intuitive LCD display and easy-to-use interface, making it simple for users to monitor and manage their power backup system.
Disadvantages:1. Limited Capacity: Depending on the specific application and power requirements, the SW Air 2 Ports may not offer enough capacity for larger systems.
2. Limited Input Voltage: The unit can only handle a limited input voltage range, which may not be suitable for all power environments.
3. Expensive: Compared to other backup power solutions, the SW Air 2 Ports may be more expensive, which could be a limiting factor for some buyers.
Conclusion:The Emerson 128199P1S Liebert/Emerson SW Air 2 Ports is an excellent backup power solution for small to mid-sized applications that require high efficiency, compact design, ease of installation, and redundancy. However, it may not be the most cost-effective option for larger systems or applications with more demanding power requirements.
Recommendation:If your power backup needs are within the capacity of the SW Air 2 Ports and the advantages outlined above align with your requirements, then this unit is an excellent choice for your application. However, if your power requirements are more significant, you may want to consider alternative backup power solutions with higher capacity and more extensive input voltage ranges.
Details:
Brand new in box.
specifications maxohvac:
- brand: Emerson
- mpn: 128199p1s
- part type: Air
seller maxohvac:
- city: franklin, tennessee
- rating: 100.0%
- # reviews: 1118
returns maxohvac:
- policy: no returns
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
offer maxohvac:
- in stock #: 5
- availability: in stock
- best offers: true
- prices: $28.00–$260.00
- item condition:
- New
- New – Open box
- started: april 18, 2026
- sold #: 9
- options: ship-to-home
payments maxohvac:
- other
- credit card: visa
- wallet: apple-pay
shipping maxohvac:
- transit: 4-9 days
- service: usps ground advantage
- class: standard
- carrier: usps
- type: calculated
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