MDi Controls provides
products and engineering services to the Compressed
Natural Gas (CNG) vehicle fuel industry.
MDi Controls manufactures state-of-the-art,
stand alone controllers that are capable of
controlling compressors, motor or engine drives,
priority/sequential valve panels, and CNG dispensers.
MDi controllers are designed to function as
stand-alone controllers for a particular piece
of equipment, or as controllers for an entire
CNG compressor/dispenser system. Priority/sequential
controllers utilize a mass-based algorithm that
uses ambient temperature, vehicle mass capacity
and heat of compression to achieve the quickest,
most efficient CNG vehicle fill. The MDi SCADA
system links controllers via MODBUS RTU protocol
to a PC based master controller. All controller
parameters can be monitored on the PC using
color graphic screens. Real time data and historical
trending are available for planned maintenance
and supervisory control.
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CNG 
