Marsh Bellofram operates a group of companies that manufacture high-performance OEM, industrial, and process control instrumentation. Its products include 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. The company serves oil and gas, protection, instruments, elastomers, and medical markets.