Belar Electronics Laboratory, Inc. is the world’s leading manufacturer of modulation monitors, which are used by radio and television stations to monitor important technical aspects of their broadcast signal. Belar also makes frequency monitors, specialized AM receiving antennas, and other related equipment for the broadcast industry. 
Belar was founded in 1964 by the late Isobel (“BEL”) and Arno (“AR”) Meyer.  Arno Meyer is still the President and owner.  They started Belar in the basement of their house in Drexel Hill, PA, doing consulting and product design.  The company moved to larger facilities in Upper Darby, PA in the late 60's, and then to its current location in Devon, PA in 1972.  
Belar products are also known for their durability—the vast majority are still in use today.   Belar shipped its first model FMM-1 FM Monitor in 1966 to what is now WBEB 101.1, Philadelphia, where it is still in use as a back-up monitor.

All the broadcaster who care for their performance using belar modulation monitor.