In Partnership with 
Mainstream Engineering’s Sentinel A4 Heat Exchanger (HEX) supports Lockheed Martin in meeting the stringent U.S. Army requirements for operation of this next-generation radar in extremely harsh environmental conditions. The HEX assembly was designed and developed, and is currently manufactured by our company. This thermal management system (TMS) provides cooling to the radar array and is currently the only active TMS on a rotating radar platform in the world. Features of Mainstream’s Sentinel A4 HEX include:
Mainstream’s OPTI Variable-Speed Pump
Mainstream’s OPTI Variable-Frequency Drive
Mainstream’s OPTI Microchannel Radiator
Mainstream’s OPTI Active Accumulator
User Benefits
Fully Operational on rotating platform (30 rpm)
Designed for base and growth modes
Operates in ambient temperatures between -40°C and +48°C
Operates in all military conditions – designed IAW MIL-STD-810 environmental requirements
Designed to the electromagnetic interference requirements of MIL-STD-461, including: CS101, CE102, CS114, CS115, CS116, CS118, RE102, and RS103