Fowler 54-440-740-1 Digital Protractor 360 Degree Magnetic Base

Product Description

The FOWLER 54-440-740-1 is a digital protractor designed for precise angle measurement across a full 360-degree range. Built with a magnetic base for secure positioning on ferrous surfaces, it delivers a resolution of 0.05 degrees and an accuracy of 0.20 degrees, making it suitable for layout work, fabrication inspection, and equipment alignment tasks. The 4-inch blade provides a stable reference surface for consistent readings. Powered by a single 3V CR2032 lithium battery, the unit features On/Off, Zero, Hold, and Reverse functions for flexible field use. Licensed tradespeople in HVAC, plumbing, pipefitting, and millwright trades rely on this type of instrument for verifying angles during installation and service.

This digital protractor is suited for both shop and field applications where repeatable angle measurement is required. Typical uses include checking duct transitions, verifying pipe pitch, confirming equipment levelness, and inspecting fabricated components. The magnetic base allows hands-free positioning against steel surfaces, freeing the technician to record readings or mark layout lines without repositioning the tool. It is equally useful in light manufacturing, sheet metal shops, and mechanical service environments.

Key Features

• Full 360-degree measuring range covers all common angle orientations in a single tool
• 0.05-degree resolution supports precise layout and inspection work
• 0.20-degree accuracy suitable for trade-level fabrication and installation tasks
• Magnetic base secures the protractor to ferrous surfaces without clamping
• 4-inch blade provides a stable edge reference for consistent measurements
• On/Off, Zero, Hold, and Reverse functions allow flexible measurement approaches

Compatibility

Designed as a general-purpose digital angle measurement tool compatible with standard trade and fabrication workflows requiring a magnetic-base digital protractor with a 4-inch blade.

Installation Notes

No permanent installation is required for this handheld instrument. Before use, ensure the reference surface is clean and free of debris that could affect the magnetic base seating or blade contact. The CR2032 battery is not included and must be installed prior to first use - follow standard battery handling precautions. Calibrate to a known reference surface using the Zero function before beginning a measurement sequence.