Ecotech Serinus 40 - 1. Introduction; 1.1 Description; 1.2 Specifications

Introduction
Page 19
1. Introduction
1.1 Description
The Serinus 40 Oxides of Nitrogen Analyser uses gas phase chemiluminescence detection to perform
continuous analysis of nitric oxide (NO), total oxides of nitrogen (NOx) and nitrogen dioxide (NO
2
).
The Serinus 40 analyser measures to a sensitivity of 0.4 ppb with a range of 0-20 ppm. The
measurement of these three gases is performed with the following main sub-components:
 NO
2
to NO converter
 Delay coil (NO
X
channel)
 Ozone generator
 Reaction cell
 Photomultiplier tube (PMT)
A microprocessor programmed with Serinus firmware monitors the detector response and many
other parameters. The concentrations are automatically corrected for gas temperature and pressure
changes and when using gravimetric units (e.g. µg/m³) is referenced to 0°C, 20°C or 25°C at 1
atmosphere. This allows the Serinus 40 to provide readings in the relevant units for your
requirements.
The U.S. EPA has designated the Serinus 40 Oxides of Nitrogen Analyser as a reference method and
SIRA has designated it as an EN approved instrument.
1.2 Specifications
1.2.1 Measurement
Range
0-20 ppm auto ranging.
USEPA designated range: 0-0.5 ppm.
MCERTS EN certification ranges: NO (0 to 1,000 ppb) NO
2
(0 to 260 ppb).
Lower detectable limit: 0.4 ppb, with Kalman filter active.
1.2.2 Precision/Accuracy
Precision
0.4 ppb otherwise 0.5% of reading, whichever is greater.
Linearity
±1% of full scale.