emra-product-tri-tronicsTRI-TRONICS® designs, manufactures and delivers high quality Photoelectric Sensors. TRI-TRONICS® also manufacture elevator door edge control protection, and rotary encoders.  All Tri-Tronics products are made in America. EMRA Controls is a proud reseller of TRI-TRONICS®.

Tri-Tronics Web Site: http://www.ttco.com/