Industries » Heavy Duty and Commercial Heavy Duty and Commercial maximatecc manufactures instrument clusters, gauges, and accessories are used reliably in heavy-duty applications including: Medium to Heavy-Duty Trucks (Class 3 – 8) Tractor Trailers Passenger Coaches Refuse Trucks Diesel Generators (Gensets) A : Fluid Level Sensor B : I/O Controller C : Fuel Sender D : Gauges E : Instrument Cluster