Smartscan
Smartscan provide machinery safety systems and products for machine guarding. Safety light guards and light curtains, safety relays and safety consultancy to installation and maintenance.
http://www.smartscan.com/

Banner Engineering
Produces photoelectric switches, ultrasonic sensors, and safety light curtains.
http://www.bannerengineering.com/

Scientific Technologies Inc.
Machine safeguarding solutions from Scientific Technologies, Inc.
http://www.sti.com/

Keyence Corporation
Advanced sensing & measuring solutions for factory automation. Including sensors, machine vision systems, bar code readers, measuring instruments & PLCs. Visit Keyence Corporation.
http://www.keyence.com/

Velocity of Light
Light source (macrosource) is a set of elementary sources which have different velocities in relation to inertial frame of the macrosource. Elementary light which is emitted by an elementary source has a strictly fixed speed c in relation to that elementary source in the moment of emission. Hereby follows that the macrosource is emitting lights that have different speeds in relation to its own inertial frame. Elementary light detector can only detect the light that in relation to it has speed c. Just that kind of light is detectable in the inertial frame of the elementary detector. The constancy of speed of light is only related to the detectable light and it is exclusivly the consequence of the strict detectors selectivity. Change of relative velocity between the light source and the detector can`t effect the detectors selectivity therefore the light speed that we detect in the inertial detectors frame is always the same. But every time another light is detectable depending on that relative velocity.
http://www.beotel.yu/~svetlost/

Advanced Industrial Products
Distributes plant safety devices, electrical sensors, safety mats, operator interfaces, light curtains.
http://www.aipoh.com/

HTM Electronics Industries
description of page
http://www.htm-sensors.com/

Ningbo Value FlashLight
Manufacturer and exporter of flashlight, book light, bicycle light, emergency light, head light and camping lantern.
http://www.led-flashlite.com

Lotus Light Himalaya
At Lotus Light Himalaya we look to the exotic cultures of the Himalayas for our products and we take pride in distributing the finest Tibetan Mandala incense, pashmina ring shawls in hundreds of colors and other accessories.
http://www.lotuslighthimalaya.com/

Tiffin Scenic Studios, Inc.
Rigging, drapery, fire curtains, turntables, light bridges, and scenic drops for theaters and auditoriums. Tiffin, OH.
http://www.tiffinscenic.com/