Schneider Electric (Barber Colman) AT-11-401 Thermostat Cover

The Schneider Electric AT-11-401 is a commercial-grade dual-window thermostat cover designed for Barber-Colman and Schneider Electric wall-mounted control units. Engineered for high-traffic environments, this clear plastic guard provides essential protection against mechanical damage, dust accumulation, and unauthorized setpoint adjustments without obstructing visibility. The two-window configuration allows technicians and facility managers to monitor dual-scale displays or multiple control points simultaneously while the locking mechanism ensures tamper-resistant HVAC control. This cover is commonly field-installed in schools, hospitals, and industrial facilities to maintain calibrated settings and prevent setpoint drift caused by external interference. Its robust construction resists impact and chemical exposure, ensuring long-term durability in demanding mechanical rooms. For contractors, the AT-11-401 offers a straightforward retrofitting solution for Barber-Colman thermostats, utilizing a universal mounting base that accommodates various wall-plate configurations and ensures a secure fit over existing pneumatic or electronic sensors.

Key Benefits

• Enhanced HVAC System Security: Prevents unauthorized occupants from adjusting building temperature setpoints, maintaining energy efficiency.
• Dual-Display Visibility: Features two viewing windows for clear observation of internal status lamps or dual-scale temperature readings.
• Durable Material Composition: Constructed from heavy-duty clear plastic that withstands impacts in high-traffic corridors and industrial zones.
• Universal Compatibility: Designed specifically as a Barber-Colman replacement part for a wide range of legacy and modern Schneider Electric wall sensors.
• Simplified Installation: Standard mounting pattern allows for quick field replacement or new installations over existing thermostat plate assemblies.

Common Questions

Does this cover interfere with thermostat sensor accuracy?
The AT-11-401 is engineered with sufficient venting to allow for natural convection, ensuring the internal thermostat maintains an accurate ambient temperature reading without significant heat lag.

Which specific thermostat models does the AT-11-401 fit?
This thermostat guard is compatible with the majority of Barber-Colman (now Schneider Electric) wall-mounted units, particularly those requiring visibility for two separate control indicators.

Is the mounting hardware included for masonry or drywall installations?
Standard mounting kits typically accommodate most wall surfaces; however, technicians should verify specific pneumatic or electronic sensor clearance before completing the final fastener attachment.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.