PRO 360 Digital Protractor - Kell-Strom KS5549

Kell-Strom KS5549
Manufacturer: Kell-Strom
Part Number: KS5549
NSN: 4920-01-420-6291
Condition: New
Lead Time: On-Order
Stock: 0 available now, 2 on the way to us
✓ Worldwide shipping options available
✓ Manufacturer CofC always available at no cost after shipping
✓ Operating manuals available online for purchased equipment
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The Kell-Strom KS5549 Pro 360 Digital Protractor is a revolutionary measuring tool that provides an immediate, digital reading of all angles in a 360° circle. The machined aluminum frame is a rigid, lightweight, ultra-precise platform that allows the state-of-the-art sensor and its microprocessor circuit to provide unsurpassed accuracy throughout the Protractor's 360° range.

The Pro 360 uses an innovative liquid filled angle sensor. As the protractor is moved, the liquid seeks a new position, resulting in changes in the electrical properties of the sensor. A microprocessor analyzes the changes and calculates the numbers seen on the display.

The Pro 360 operates normally in a standard reference mode where level is displayed as 0.0°. However, a new reference point for 0.0° can easily be established by pushing the ALT ZERO button. You can also "freeze" any displayed angle on the LCD by pushing the HOLD button.

The 360° range of the unit is organized into four 90° quadrants for display purposes. In each, the Pro 360 achieves an accuracy of + 0.1° at level and plumb with a maximum error of + 0.2° in between.

And the Pro 360 does not need to be returned to the manufacturer or dealer for recalibration. By following the Superset instructions in this booklet, you can test and recalibrate the Pro 360 in just a couple of minutes on-site and without any special fixtures.


  • Full 360-degree range (90° x 4)
  • Easy to read LCD display which intelligently flips over when the unit is upside down
  • Maximum accuracy of +/- 0.1° and a maximum resolution of 0. 1°
  • Precision, machined aluminum frame
  • The unit can be recalibrated to factory accuracy in the field without special tools or fixtures
Alternate Models
09429606Alternative Part Number
PRO 360Alternative Model Number for PRO-360 Digital Protractor