Ecotech Serinus 44 - 1. Introduction to Serinus 44 Analyser; 1.1 Description and Specifications

Introduction
Page 17
1. Introduction
1.1 Description
The Ecotech Serinus 44 NO/NO
2
/NO
X
/NH
3
/N
X
uses Gas Phase Chemiluminescence Detection to
perform continuous analysis of nitric oxide (NO), total oxides of nitrogen (NO
X
), nitrogen dioxide
(NO
2
) ammonia (NH
3
) and total oxides of nitrogen + ammonia (N
X
).
This section will describe the specifications of the instrument as well as the main components and
techniques used to obtain stable gas concentration readings.
1.2 Specifications
1.2.1 Measurement
Range
0-20 ppm autoranging
Lower detectable limit: 0.4 ppb, with Kalman filter active
Precision
0.4 ppb otherwise 0.5% of reading, whichever is greater
Linearity
±1% of full scale
Response Time
25 seconds to 90%
Sample Flow Rate
~0.3 slpm per channel (~0.9 slpm total flow for all channels)
1.2.2 Calibration
NO Zero Drift
Temperature dependant: 0.1 ppb per °C
24 hours: < 0.4 ppb
7 days: < 1.0 ppb
NO Span Drift
Temperature dependant: 0.1% per °C