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Mechanical Boom Angle Indicator:  490L

  • Compact version of 4120 Boom Angle Indicator

  • Engraved then backfilled white markings - for long-lasting durability and high visibility

Model 490L Specifications (left-hand pictured)


6"w X 2 11/16"h X 3/8""d

Degree Range

-10 through +80

Degree Markings


Case Materials

Black Acrylic, engraved backfilled white markings

Tube Construction

Glass with black ball on white background


Right or Left Hand available


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Contact Information

Rieker Inc.
34 Mount Pleasant Rd
Aston, PA 19014
Ph: (610) 500-2000
Fax: (610) 500-2002
Toll Free: (800) 497-4523
Hours of Operation:
8am-5pm EST

Copyright 2018 Rieker Inc.  All Rights Reserved.  Updated 08/17/18

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