MPN: NH3CAN Category:

ECM’s NH3CAN Module is a CAN output device for the measurement of NH3 in the exhaust of diesel and other lean burn engines.  This makes the module useful for SCR system development or to compensate NOx sensors for their NH3 cross-sensitivity.  NH3CAN uses a ceramic sensor that is mounted in the exhaust of the engine and communicates NH3 via its CAN port.

Although designed as a measurement tool, the NH3CAN can be easily integrated into an engine or aftertreatment control strategy.  The CAN node identification can be programmed by the user allowing multiple NH3 modules on the same bus.  NH3 sensors used with the module have memory chips in their connector where calibration information is stored.  This allows the sensors to be recalibrated (Zero, Span) in a central location and distributed to users, ensuring consistent results throughout a large test facility.  PC software to set-up, control, calibrate, and view outputs and sensor parameters is included (requires CAN adapter, available).  Three optional displays, two with programmable analog outputs, are available.  These displays can be used with one or two modules.

Response Time Less than 1 s
Power 11 to 28 VDC, AC/DC (optional)
Sensor Mounting NH3: 18mm x 1.5mm thread
Dimensions Module: 145mm x 120mm x 40mm, Environmentally Sealed
Sensor Cable: 0.5m (sensors), +2m (standard), +3m (optional)
Operating Temperature Electronics: 55 to +125°C, IP67
Sensor: 450°C (maximum gas temperature for specified accuracy), 700°C (maximum gas temperature without possibility of sensor damage)
Ranges & Accuracies
NH3 0 to 2000 ppm (± 5 ppm from 0 to 200 ppm). For λ > 1 only.
CAN CAN2.0A. Compliant with ISO 11898.
Configurable via CAN using ECM's Configuration Tool software.

Included Kit Components

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Calibration Tools

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NH3CAN Module Configuration Software Manual (Ver. 2015-09-02, 2 MB)
NH3CAN Manual (Ver. 2015-02-05, 3 MB)
NH3 Calibration Instructions (Ver. 2022-09-15, 258 KB)
NH3CAN Brochure (Ver. 2020-04-24, 281 KB)
Firmware Update Procedure for Modules (220 KB)
ECM Configuration Tool (Ver. 4.48.20, 30 MB)