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Reviews (2)
Jul 02, 2018
Nice tables but paper thin.
Good info on table, basic NDL times as well as Navy decompression tables (1984) for air. Problem with this product is that it's flimsy with a thickness of less than 1/32", so it's extremely bendable and prone to creasing.
May 29, 2018
great beam sensor for a use with a variety of applications
Beam sensor that has a transmitter and receiver on one end, and a reflector on the other. Excellent for use with different applications, runs off AC 120 (wall socket in USA) or a wide DC range. NOTE - THIS IS NOT A COMPLETE ALARM SYSTEM. This is stated in the description. If you are looking for a product that is ready to plug in (product doesn't come with a plug), this is not for you. If you have some experience with electronics then it will be great. Product is designed as a sensor to activate some other device of your choosing, so it's great for the DIYR. When the beam is broken, it triggers a relay that either opens or closes a circuit.
For my application, I needed a way of knowing when someone enters our shop when I'm not on the floor. I installed this product at our roll up door (28' wide) and wired the circuit as normally open N/O up to a wireless door bell remote (different product). When beam breaks, circuit closes, remote triggers, and wireless doorbell transmitters I installed around the shop chime. Just one example. You could hook this sensor up to a surveillance system to start recording when beam is broken, etc. Endless applications... point is you need to wire this up to another device to have it do something meaningful.