Table 6.

Sample Sensor Evaluation Toolkit (SET) analysis. IPI (Integrated Performance Index) of the MSU sensors for ambient nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), and carbon monoxide (CO). Color code: red (<0.50), magenta (0.50–0.59), yellow (0.60–0.69), light blue (0.70–0.79), dark blue (0.80–0.89), green (0.90–1.00).

MSU #	Deployment	NO	NO2	O3	CO
001	Barcelona, Spain 2–9 July 2014	0.66	0.46	0.69	0.59
002		0.41	0.46	0.67	0.57
003		0.56	0.50	0.70	0.58
004		0.67	0.50	0.68	0.57
005		0.64	0.48	0.67	0.58
221	Belgrade, Serbia	0.79	0.59	0.59	0.69
222	15 January–27 May 2014	0.79	0.55	0.54	0.69
116	Edinburgh, Scotland 25 March–7 July 2014	0.51	0.41	0.65	0.52
118		0.50	0.39	0.60	0.45
120		0.51	0.41	0.63	0.48
135	Haifa, Israel 16 December 2013–27 April 2014	0.51	0.62	0.66	0.56
136		0.51	0.64	0.70	0.55
130		0.62	n.a.	0.64	n.a.
134		0.63	n.a.	0.63	n.a.
125	Ljubljana, Slovenia 25 February–5 June 2014	n.a.	0.55	0.71	0.77
128		n.a.	0.46	0.69	0.68
131		n.a.	0.54	0.72	0.66
124	Oslo, Norway 13 February–2 June 2014; 25 June–3 September 2014; 15 September–9 December 2014	0.92	0.69	n.a.	0.71
144		0.87	0.64	n.a.	0.70
145		0.86	0.71	n.a.	0.70
146		0.90	0.70	n.a.	0.68
147		0.88	0.57	n.a.	0.59
611	Ostrava, Czech Rep. 19 December 2014–15 January 2015	n.a.	n.a.	0.74	n.a.
612		n.a.	n.a.	0.77	n.a.
143	Vienna 1 January–8 August 2014	0.39	0.35	0.40	n.a.

n.a.—Reference data were unavailable for the analysis.