Continuous Emissions Monitoring System (CEMS)

Continuous emission monitoring system (CEMS) is the total equipment necessary for the determination of a gas or particulate matter concentration or emission rate using pollutant analyzer measurements and a conversion equation, graph, or computer program to produce results in units of the applicable emission  and transmit the information to the

Continuous Emission Monitoring system

System Controller

The system controller is a Siemens S7 1200 PLC with Modbus TCP. It

is used to control the day to day operation of the CEMS. It controls

the daily automatic validation sequence and probe blow back

sequence, and monitors the overall status of the system. The system

controller is the primary interface for the system user.

Probe and filter assembly

The standard probe is 3’ long 316 SS suitable for up to 1000° C

maximum. The filter assembly is a 270S heated filter assembly

(general purpose), 4” 150# RF flange 316SS NEMA 4X fiberglass

enclosure.

Data Acquisition System (DAS)Optional

The DAS is suitable for 40 CFR 60 and includes: 1 PC, local rack

mount, industrial type, EMC station manager software for

communications with a Siemens S7 1200 PLC.

CEM System Main Parts
The standard  of a sample probe, filter, sample line (umbilical), gas conditioning system, calibration gas system, and a series of gas analyzers which reflect the parameters being monitored.

Typical monitored emissions include: SO2/NOX/CO/CO2/HCL/HF/ dust/flue gas flow rate/pressure/temperature.