3500-3550 Series
14" Horizontal Beam Optical Comparator

The 3500-3550 Series 14" Comparator feature a more rigid stage with greater measuring range and accuracy. Over 60 years of experience manufacturing in the U.S., combined with its nation wide factory service organization makes S-T Optical Comparators your best buy in the industry.

	Quadra-Chek 121 The Standard digital readout features absolute/incremental, IN/MM conversion, random zeroing, RS232C output, linear error compensation and Q axis for digital screen protractor.
	Quadra-Chek 221 and 221E These powerful digital readouts provide fast geometric computations in a simple, easy to use format. Functions include point, line, circle, distance, angle, skew alignment and Measure Magic. Other features include Inch/MM, Cartesian/Polar, nearest/farthest distance, complimentary angles, serial and parallel ports and 200-feature memory. Large, high contrast LCD screen graphically displays measurement features and construction. Housing tilts backward or forward for best angle of operation. Model 221E includes fiber optic edge sensor.
	Quadra-Chek 5215 PC computer based geometric readout system, mouse driven, with on screen graphic representation of part or part segment as it is measured. Simple CAD interface simplifies constructions and part programming. Unlimited part and feature memory. Includes computer with Microsoft® Windows®, fiber optic edge sensor and all functions found in the Quadra-Chek 200.

Heavy Duty Dust Cover