Commercial Garage Door Opener Normally Open Air Switch

Commercial Garage Door Opener Normally Open Air Switch



Item# AS-3
$28.00
Availability: Usually ships the next business day
Quantity:

Product Description

Commercial Garage Door Opener Normally Open Air Switch

Exterior 2 wire switch in metal box

Recommended for use with Driveway treadle hose

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Comments / Questions

COMMENT: I needed it by Ariel e 1/24/2014
COMMENT: price by MARC H 4/10/2013
QUESTION: what is the differeance between open air switch and closed air switch? by mark s 11/6/2012
ANSWER: A normal open switch dosent allow a signal to pass until the switch closes.<br /><br />A normal closed switch is allowing the signal to pass until the the switch opens. <br /><br />If you are trying to send a signal continuous you want an closed switch.<br /><br />If you only want to send a signal when someone activates the switch, then you are looking for a normaly open switch. by A D a