Marsh Bellofram Instrumentation headquartered in Newell, West Virginia, USA, is an AS9100D and ISO9001:2015 certified, leading global manufacturer of high-performance OEM, industrial and process control instrumentation, including timers and counters, digital controllers and panel meters, RTDs and thermocouples, FRLs, cylinders, natural gas and propane pressure regulators, air pressure regulators and transducers, tank and liquid level measurement systems, pump and motor protection switches and alternating relays, as well as sensors, industrial diaphragms, and specialty silicones.