Kavlico Develops Urea-Dosing Sensor for Heavy Duty Truck Applications

October 1, 2008

MOORPARK, Calif. – Kavlico, a global business unit of Custom Sensors & Technologies (CST), is pleased to announce the development of their new sensor for urea-air dosing utilizing (AUS32) Aqueous Urea Solution 32.5% or AdBlue™ in Selective Catalytic Reduction (SCR) after-treatment systems with diesel engines. This (AUS32) solution is high purity urea in de-mineralized water that is clear, non-toxic, and safe to handle.

Kavlico’s urea-dosing sensor generates an output used to provide feedback to the SCR system to assist in optimizing the reduction of NOx emissions by monitoring the SCR system and helping to determine the appropriate amount of AdBlue reducing agent to be delivered to the catalytic converter module.

AdBlue is carried on-board SCR-equipped trucks and buses in specially designed tanks and it is dosed into the SCR system at a rate equivalent to 3–5% of diesel consumption. The low dosing rate ensures long refill periods and minimizes the tank’s impact on chassis space. Currently used throughout Europe, Japan, Australia, Hong Kong, Taiwan, Korea, New Zealand, and Singapore in on-highway SCR systems, urea dosing will become prevalent in North America due to legislative limits placed upon NOx emissions.

Kavlico’s urea-dosing pressure sensor utilizes a ceramic capacitive sense element for pressure ranges up to 25 Bar and a thin film (TiON) sense element for pressure ranges above 25 Bar. The sensor is packaged in a durable, all-stainless steel housing. Requiring a 5 Vdc power supply, the sensor provides a 0.5 to 4.5 Vdc linear amplified analog output proportional to pressure.

Other significant features of this high accuracy, rugged sensor include the ability to operate in high vibration environments, the capability to withstand high overpressures, and operate over a temperature range of -40 to +130°C.

About Kavlico

Kavlico is an operation of Custom Sensors & technologies (CST) and is a global business unit of Schneider Electric. Kavlico is a leading manufacturer of pressure, position (LVDT & RVDT), force, level, tilt, media quality, and other specialty sensors, and transducers for the transportation, industrial and aerospace & defense markets. www.kavlico.com

About Custom Sensors & Technologies

Headquartered in Moorpark, CA – Custom Sensors & Technologies (CST) is a global business unit of Schneider Electric and is comprised of industry-leading brands including Crouzet, Kavlico, Crydom, and former divisions of BEI Technologies – Newall and Systron Donner. CST provides sensors, controls, and actuation products for the Transportation, Industrial and Aerospace & Defense markets. www.cstsensors.com

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