Dewhurst Fixtures
Dupar Controls is the Canadian divison of Dewhurst.
Dewhurst also owns an American manufacturer, ERM.
US85
US85 is a large button, most commonly used in transit stations and airports. It comes in either black or silver.
US89
US89 is a metal button, with a rounded square shape.
US90
US90 is a square metal button, introduced in the 1980s.
US90-15 (braille on button)
US90-EN (black)
US91
US91 is a round metal button. It usually has either the number or a small circle in the center that lights up, alongside the halo.
US91-BB
This is a variant of US91 with a concave pit in the center, this concave part has a brass finish.
US90/US91 Jumbo
This is a larger variant of US90 or US91 respectively. US90 Jumbo can be told apart from US85 because US90 Jumbo has a narrower halo.
US92/US94
US92 is a round plastic button. US94 is the square variant.
US97
US97 is a black rubber button with an illuminating halo.
US100
US100 is a vandal resistant button, which resembles Dover/ThyssenKrupp Older Vandal Resistant.
M20
The M20 series of round buttons comes in black, brass, and chrome.
Documents
2019-Dewhurst-Brochure.pdfDewhurst catalog (2019)