something which adheres to and crawls upon vertical surfaces
The wall crawler will also take ultrasound readings to reveal pits and cracks beneath the surface of the steel walls.1995 September 23, Vincent Kiernan, “Send in the robots”, in New Scientist, volume 147, →ISSN, page 36:
The wall crawler... is a commercially available crawler, which attaches to the steel tank wall through strong, permanent magnetic wheels.2004, “Remote Testing of Underground High Level Radioactive Waste Storage Tanks”, in Materials Evaluation, volume 62, American Society for Nondestructive Testing, →ISSN, page 917:
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This weaponized wall crawler, assumedly capable of creeping into some 2025 apartment window in Baghdad, Beruit, or Kerachi "carrying a combat load," definitely is not meant to be your friendly neighborhood Spiderman.2009 March 3, Nick Turse, The Complex: How the Military Invades Our Everyday Lives, New York: Metropolitan Books, →ISBN, page 243:
wall-crawler
noun
Etymology From wall + crawler.
1
something which adheres to and crawls upon vertical surfaces
As Mother Jones goes to press, the masked, web-slinging wall-crawler is busy foiling a computer technician's evil designs to brainwash people through subliminal advertising in video games.1983 September-October, Bob Sanders, “Our Kind Of Superhero”, in Mother Jones, volume 8, number 8, page 9:
You're not just buying and selling with a wizard and a scholar in tow. What's so important that you have to hire a wall-crawler?1999 January 7, Juliet E. McKenna, The Thief's Gamble (Tales of Einarinn), Orbit, →ISBN, →OL:
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Her fingers slipped, and she felt herself starting to fall. At that same moment the wall-crawler sprang down at her, gripping the carved inscriptions in the black glossy surface with its left hand while its right swung down to clamp around her throat.2010 December 28, Joe Schreiber, Red Harvest (Star Wars), New York: LucasBooks, →ISBN, chapter 42: