|
| MODEL |
SENSOR OPTIONS / RANGE |
# OF SENSORS |
|
MEETS EPA PROTOCOL? |
| CN |
O2, CO, NO (Nox) |
|
Boilers |
NO |
| CL |
O2, CO, NO |
|
Boilers |
NO |
| EN2 |
O2, CO, NO, NO2 & Nox |
|
Boilers |
YES* |
| J2KN |
O2, CO, Nox, SO2, HC |
|
Boilers, Engines |
YES |
| J2KN-IND |
O2, CO, Nox, SO2, HC |
|
Boilers, Engines |
YES |
| SEEA |
O2, CO, Nox, SO2, HC |
|
Stationary/Lab, Boilers & Engines |
YES |
| VETS |
O2, CO, Nox, SO2, HC, OPACITY |
|
Buses, Trucks (Diesel Engines) |
YES |
Sensor configurations available in ECOM analyzers can be optimized for specific combustion applications.
Reciprocating Engines
Many natural gas engines, commonly referred to as “rich burn” are designed to operate at stoichiometric combustion, meaning all Oxygen is consumed in the combustion process. This has the potential to generate CO concentrations in the 4000 + ppm range, and is sometimes fitted with catalytic converters designed to reduce the emitted CO levels to less than 500 ppm. In this instance, 2 separate CO sensors can be installed in the analyzer; a CO sensor capable of reading levels up to 60,000 ppm upstream of the catalyst primarily for engine diagnostics and to check the efficiency of the catalytic converter, and another sensor for post-catalyst testing, designed to provide highly accurate measurements at the lower end of the scale.
The typical NOx value found in the exhaust of this engine type is within the measuring range of the Standard NO & NO2 sensors in our analyzers.
Newer natural gas engines...
turbines, as well as diesel engines are designed to operate on a lean air-fuel ratio, meaning not all oxygen is consumed in the combustion process, leaving significant levels of oxygen in the exhaust stream. These types of engines are referred to as “lean burn.” Typically, the CO levels in theses types of engines is relatively low. In this case, only the low range CO sensor is recommended, which measures 0-4000 ppm. NOX levels can very, depending on the technology. Most customers choose the standard NOx sensors, which measure 0-4500 ppm. For those designated as LOW NOx applications, we offer NO and NO2 sensors capable of measuring in the single digit range with a 0.1 ppm resolution. The nominal range of the Low NOx sensors is 0.1 – 350.0 ppm.
Boilers and other “non-engine” combustion systems
The most common sensor configuration for boiler applications where combustion efficiency is the only objective, a model with the O2 and CO sensor is all that is required. Where NOx measurement is required, there are several options. For basic combustion tuning and set-up, only an NO sensor may be needed. Where true NOx , meaning NO and NO2 must be measured, both the standard NOx and LOW NOx sensors are available, depending on the range of NOx to be measured.
Stationary Monitoring
The ECOM SEEA is designed for stationary combustion systems that requires frequent, but unattended monitoring. The heart of the SEEA is the model A-PLUS, therefore, many sensor configurations are possible, making it suitable for engine, turbine, or boiler monitoring.
Heavy Duty Diesel Fleet
The VETS product is designed to simplify emission testing and record keeping for medium to large diesel fleets. The analyzer is fitted with standard O2, CO, and NOx sensors suitable for diesel engine testing, with Opacity and HFID Hydrocarbon analyzers available as an option.
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