Model 914 Continuous Emission Monitoring System

The  Model 914 is a built-to-order Continuous Emission Monitor (CEM) that includes all the components needed for a compliance monitoring and reporting project.


The  Model 914 is a built-to-order Continuous Emission Monitor (CEM) that includes all the components needed for a compliance monitoring and reporting project. The system uses dry extractive sampling techniques designed to meet government regulations for all types of compliance monitoring.

The sample extraction system of the 914 combines a temperature controlled sample conditioning unit and a heated sampling line to ensure the integrity of the sample gas is reliably maintained. The sample gas is then dried (moisture removed) as required and introduced into the instruments for analysis.

AMETEK uses only instruments that have proven reliable over many years of use in its 914 systems. All of the CEM instruments are EPA certifiable. A recommended analyzer is the AMETEK Western Research Model 9000RM.

The instrument is mounted in a free-standing standard 19-inch open rack. Optional considerations are: an enclosed rack, a free-standing enclosure or a walk-in shelter for environmental reasons. A computer data acquisition system or programmable logic controller providing data collection and control functions for customer specific reporting and auto calibration is optional.

Methodology Standard – NDUV, NDIR, Zirconium Oxide, Paramagnetic O2
Calibration DAS/DCS/PLC or selected analyzer, initiated automatically using instrument air and calibration gas standards
Sensitivity Instrument dependent
Outputs Designed to meet customer specifications (standard voltage, current or serial)
Range Designed to meet customer specifications
Reporting Customer-defined format for reporting or regulatory agencies. EPA Part 60 and Part 75.
Alarms/Calculations Designed to meet customer specifications
Electrical Requirements 120/208 VAC or 110/220/240 VAC 50-60 Hz
Typical Flow 2 to 10 SCFH
Ambient Temperature 7 to 49 °C (45 to 120 °F), 5 to 95% relative humidity, non-condensing
Physical Dimensions Application dependent
Sample dryers – thermoelectric (Baldwin Environmental, Inc. and others)
Current Configurations
Analyzers Available
  Single species NDUV + paramagnetic oxygen Model 9900 SO2, H2S, NO, NO2, O2, NH3, Cl
  Multi species NDUV + paramagnetic oxygen Model 9900 for SO2, H2S, NO, NO2, NOx, O2, NH3, Cl
  Mass flow S-type pitot tube, optical, etc.
  Single species NDIR Various analyzer models available (Siemens, California Analytical, Servomex)
  Zirconium oxide Thermox O2 analyzers
Probes Available AWR emission probe
AWR mass emission probe
M&C probe, c/w calibration port,
(optional, blow back, and sample isolation valving)
AWR velocity probe (used separate with M&C for mass)
Universal probe for Division II applications
Sample System Sample lines – temperature controlled, self-limiting electrical (O’Brien, Technical Heaters)
Rack Components Basic 19” x 24” rack (no panels)
Pressure control panel
Temperature control panel
Customer termination and system alarm panel
Flow distribution panel(s)
Rack fans (optional)
Data Acquisition and Control System Allan Bradley PLC
WTC and VIVICOM DAS (others available upon request)
Shelter/Enclosure Open 19” x 24” rack
Enclosed 19” x 24” rack
Fiberglass or metal free-standing enclosure
AMETEK’s standard walk-in shelters (optional desk/workbench)
Area Classifications Model 914 CEM rack system in General Purpose and Division II (purged)
Wetted Components 316 SS tubing, fittings (Swagelok only) and cell construction
Teflon tubing
Quartz glass (cell windows)


Model 914 Continuous Emission Monitor (CEM)