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Product Specifications

The heart of the Shaw System is the Multifunction Head Unit (MFHU). To simplify design, the MFHU contains integrated level and temperature, and fluid quality (concentration) sensors . By using ultrasonic sensing technology the level sensor eliminates the problems normally associated with mechanical designs. Outputs from all sensors are fully compatible with major dosing units available today in analog or CANBUS output.

Included in the MFHU is an engine coolant powered heater to thaw or prevent freezing of DEF in conditions below 12 °F (-11 °C). The heater is designed for optimal performance to meet OEM and governmental regulations. Electrical heating is also available for special applications.

In order to meet reduced Nitrogen Oxides (NOx) emission levels, many diesel engine manufacturers have turned to Selective Catalytic Reduction (SCR) as the technology of choice. Storage , monitoring, and transfer of diesel exhaust fluid (DEF) is best handled with a single source system solution.

Optional items such as remote fill adapters and vents, lockable caps, coolant control valves, electrically heated suction, return, and pressure hoses, and mounting brackets are available to complete the DEF reservoir system.
Unit of Measure



  • Multifunction Head Unit (MFHU) - Contains Integral Level, Temperature, Quality (concentration) Sensors, Coolant Heater, Serviceable Suction Filter. Available in various lengths and electrical outputs (CANBUS or Analog). Simplifies design by integrating level, temperature, and quality (concentration) sensors, serviceable DEF filter, connections for electrical, suction return and coolant lines.
  • DEF Reservoirs - Multiple standard designs (3, 5, 10, 25 gallon with landscape or portrait orientation) increases installation design flexibility. Custom designs up to 275 gallons are also available.
  • DEF Fill Cap - Easily identifiable blue, 1/4 turn cap with 19 mm ISO 22241 magnetic restrictor to prevent mis-fills.


N/A , Coolant Control Valve
, Electrically Heated DEF Line
, Brass Forged Coolant Tee
, SAE J2044 Female Quick Connector

DEF Tank

DEF Tank, 5, 10, 15 Gallon, Landscape or Portrait Designs. Custom shapes and designs available.

Electrically Heated Hoses

Electrically Heated Hoses: Return, Suction, Pressure Various lengths and fittings available.

Remote Fill/Spill Pan with Cap

Remote Fill / Spill Pan with Cap DEF compatible Remote Filler hoses available

Coolant Valve

Coolant Valve, 12 VDC or 24 VDC and Accessories