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Aftertreatment Applications

Without accurate thermal management, controlling diesel emissions is nearly impossible. Temperature measurement uncertainty leads to lower diesel particulate filter (DPF) durability, lower regeneration fuel economy, or both. A more accurate sensor allows better control of the DPF, resulting in higher reliability, more effective soot oxidation rates and better fuel economy.

At Watlow, our expertise is designing, manufacturing and delivering complete thermal solutions that precisely measure and monitor temperatures. Solutions that improve diesel aftertreatment system performance and comply with stringent on-board diagnostics (OBD) requirements. 

Watlow sensor solutions maximize diesel oxidation catalyst (DOC) performance, enable efficient and controlled DPF regeneration and provide for optimized selective catalytic reduction (SCR) system efficiency. We proudly manufacture sensors from our TS 16949, ISO 9001 and ISO 14001 sensor certified facility.

Does your application require additional heat for aftertreatment optimization or DPF regeneration? We offer a wide range of heater, temperature sensor and controller technologies that integrate with your system to facilitate an optimized aftertreatmemt system.

Watlow's application-specific heater technologies and controllers solve problems including diesel exhaust fluid (DEF) thawing and freeze prevention and urea re-crystallization at the doser and SCR inlet. 

Please contact us today to learn how Watlow can design an aftertreatment solution to meet your diesel application needs.


Diesel particulate filter (DPF) for control of particulate matter (soot) emissions

EXACTSENSE® Thermocouple
Maintains precise temperature to optimize thermal control of DPF regeneration. Improves system efficiency and prevents damage to the filter and catalyst due to overheating.

Exhaust gas pre-heating for DPF regeneration

WATROD™ Tubular Heater
Initiates the ignition of particulates captured in the DPF assembly during the regeneration stage.

Diesel oxidation catalyst (DOC) to control HC and CO emissions

EXACTSENSE® Thermocouple
Measures exhaust gas temperature to control hydrocarbon (HC) and carbon monoxide (CO) emissions.

Diesel exhaust fluid (DEF) tank and supply module heating

Silicone Rubber Heater
Provides reliable freeze protection or thawing of DEF (urea) tanks, pumps, filters and other selective catalyst reduction (SCR) system components in applications where the temperature can drop below 12°F.

Selective catalyst reduction (SCR) for control of NOx emissions

EXACTSENSE® Thermocouple
Measures exhaust gas temperature to control nitrogen oxide (NOx) emissions. Temperature sensor accuracy and speed are important for control of NOx outside of the effective catalyst conversion range.

Related Literature

Specification Sheets (1)