Home > Products > Auto Sensors > PM Sensors(Soot Sensors)
PM Sensors(Soot Sensors)

The Particulate Matter (PM) sensor /Soot Sensor is an exhaust sensor that measures cumulative particulate mass used for onboard diagnostics (OBD) and helps detect leakage in the diesel particulate filter (DPF).

The integrated heater maximizes sensor regeneration across a wide range of operating conditions.

The increased use of Particulate Matter Sensors (PMS) /Soot Sensors now utilized on increasing numbers of Diesel-powered vehicles.

Currently, for Diesel-powered vehicles to meet Emission Legislation Standards in Europe and the USA, they are generally fitted with an exhaust trap/filter for Particulate Matter. (DPF – Diesel Particulate Filter). Monitoring the levels of restriction in the DPF can be provided by evaluating the pressure difference across the filter by the “DPF – Exhaust Pressure Sensor” as required by in-use monitoring (OBD), to ensure the efficiency of a functioning DPF through a regeneration process.

pm sensors(soot sensors) 7

Particulate Matter (PM)Sensors Soot Sensors Features/Benefits:

1.Compact sensor design.
2.Fast response time.
3.Equipped RTD (Resistive Temperature Device) element.
4.Allows for closed-loop heater control for accurate sensor regeneration.
5.Plausibility diagnostics capable.
6.Compliance with current and future emissions limits and on-board diagnostics regulations.
7.Monitoring of the diesel particulate filter(DPF) function
8.Systems expertise covering diagnostics function and sensor
9.Communication with the engine control unit via CAN interface.

With the continuing tightening of emission regulations for Diesel engines, a more direct measurement of particulate matter is required that provides sufficient accuracy and sensitivity with the structure necessary for stable long-life operation, whilst dealing with exhaust gas conditions.
Life Span – 250,000km Max Exhaust Temperature 850 Deg C.

The particulate matter sensor can assist in:

The estimation of the amount (Mass) of soot accumulation in the DPF for a more accurate DPF Regeneration strategy.
DPF failure detection process which may result in excess PM emissions, to log an OBD fault signal.

pm sensors(soot sensors) 8

lParticulate Matter (PM)Sensors /Soot Sensors Parameters
Resistive soot sensor concept DE, heater and T-measurement
Excellent signal repeatability 1. Artificial soot particle test bench: ±3% (e.g. @ 10mg/m3, 800l/min)

2. Engine test bench: < ±5% (1s) (over wide range of engine map)

“Natural” hyperbolic relationship between time-to-threshold and

soot concentration

Improved discrimination at low particle concentrations
Sensor response time sufficient for DPF defect detection FTP72 driving cycle with DPF (18 mg/mi)
Stand-alone sensor (CAN interface) 1. sensor management, regeneration control, signal processing,

verification of sensor signal are controlled by SCU

2. Easy integration of the sensor into existing engine control system

pm sensors(soot sensors) 9

Particulate Matter (PM)Sensors /Soot Sensors Application and After-Sales Service:

Particulate matter sensor for onboard diagnosis (OBD) of diesel particulate filters (DPF)
Enno Baars, Henrik Schittenhelm, Andreas Genssle, Bernhard Kamp, Thorsten Ochs

pm sensors(soot sensors) 10Our factory management is in accordance with international 5S standards, strict requirements, and supervision of the various production processes.

1.ISO9001 quality system certified.
2.Good material&Advanced technology& strict quality control ensure high quality; High quality makes sure long usage life.
3.Quick delivery 3-7 days.
4.Competitive price.
5.Various types and different car models.
6.Particulate Matter (PM) Sensors (Soot Sensors) exported to European, North American, American, Korean, and Japanese.


Please Choose: