NOxCAN

The units photographed for this listing are ECM (Engine Control and Monitoring) NOxCANt modules. The label reads 'NOxCANt CANopen NOx / O2 Module, use with P/N 06-05 NOx sensor'. The NOxCANt is the control module of ECM's NOxCANt kit, which measures NOx, O2 and (with the optional pressure sensor) exhaust pressure, and puts the values on a CAN bus. ECM aims it at combustion development and aftertreatment work on engines.

The module drives a ceramic NOx sensor (ECM P/N 06-05, an NTK Type 2 / 'Type T' sensor, 18 mm x 1.5 mm thread). It reports NOx in ppm and O2 in %, and derives lambda, air-fuel ratio, fuel-air ratio and phi from the oxygen signal, with programmable fuel H:C, O:C and N:C ratios and a hydrogen mode. The sensor's factory calibration and any user zero or span are kept in a memory chip in the sensor connector, so a sensor reads the same on any module.

Power and CAN share one 5-pin Eurofast 12 mm connector (11-28 VDC, CAN_H, CAN_L, shield). Out of the box the module broadcasts CANopen messages at 500 kbit/s from a user-set node ID, so several modules can share one bus. Setup, monitoring and logging use ECM's free Configuration Tool on a PC with a CAN adapter such as ECM's 13-02 (Kvaser Leaf Light). It also works with ECM's dashCAN display heads. ECM still sells the NOxCANt kit (MPN NCAN-TXX).