MPN: NCAN-GXX Category:

The ECM NOxCAN, Type G Module (NOxCANg) is a versatile and highly integratable NOx, Lambda, and O2 measurement module for the development of diesel engines and combustion systems that can operate lean of stoichiometric, and their aftertreatment systems.  The NOxCANg uses a ceramic NOx sensor (Type G) that is mounted in the exhaust of the engine and communicates measured NOx, Lambda, O2, and all sensor parameters via its CAN port.  NOxCANg is suitable for engines and combustion systems that operator lean of stoichiometric (i.e. Lambdas greater than 1).  Most diesel engines and gas turbine engines fall into this category.  The Type G sensor has a 1:0.67 cross-sensitivity to NH3 (1 ppm NH3 looks like 0.67 ppm NOx to the sensor). This cross-sensitivity is also affected by O2 concentration.  The Type G sensor is recommended when NOx ppm is 10 ppm or less and the exhaust is lean of stoichiometric.  Although designed as a measurement tool, the NOxCANg can be easily integrated into an engine or aftertreatment control strategy.  The CAN node identification can be programmed by the user allowing multiple NOx modules on the same bus.  Fuel H:C, O:C, and N:C ratios can be programmed.  NOx 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, not included).  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 (NOx).
Less than 150 ms (λ, AFR, φ, O2)
Fuel Type Programmable H:C, O:C, and N:C ratios, and H2
Power 11 to 28 VDC, AC/DC (optional)
1.2A @ 12V (steady-state), 4A @ 12V for 30s (start-up)
Sensor Mounting NOx: 20mm x 1.5mm thread
Pressure: 1/4" NPT/ISO
Dimensions Module: 145mm x 120mm x 40mm
Sensor Cable: 0.6m (sensors), +2m (standard), +3m (optional)
Operating Temperature Electronics: -55 to +125°C, IP67
Sensor: 850°C (maximum continuous)
Ranges & Accuracies
NOx 0 to 5000 ppm (± 5 ppm from 0 to 200 ppm, ± 15 ppm from 200 to 1000 ppm, ± 1.5% elsewhere). For λ > 1 only.
λ 0.4 to 25 (± 0.8% at stoichiometric, ± 1.8% average elsewhere)
AFR 6 to 364 (± 0.8% at stoichiometric, ± 1.8% average elsewhere)
F/A 0.003 to 0.167 (± 0.8% at stoichiometric, ± 1.8% average elsewhere)
φ 0.04 to 2.5 (± 0.8% at stoichiometric, ± 1.8% average elsewhere)
O2 0 to 25% (± 0.2% absolute)
Pressure SAE: 0 to 75 psia (± 0.75 psia)
Metric: 0 to 517 kPa (± 5.2 kPa)
CAN CAN2.0A. Compliant with ISO 11898.
Configurable via CAN using ECM's Configuration Tool software.

Included Kit Components

The base kit includes the following:

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Pressure Compensation (SAE) option adds the following:

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Pressure Compensation (Metric) option adds the following:

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Calibration Tools

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NOxCAN Module Configuration Software Manual (Ver. 2023-06-10, 2 MB)
NOxCANg Manual (Ver. 2008-12-04, 662 KB)
ECM Configuration Tool (Ver. 4.48.20, 30 MB)
TechNote Engine Stoichiometry (66 KB)
Firmware Update Procedure for Modules (220 KB)
Firmware for NoxCANg Module (Ver. 6.2, 32 KB)