Applications

• Control of combustion processes
• Process optimization
• Plant and operator safety
• Process measurements in all types of power and combustion plants
• Process control
• Explosion protection
• Measurements in corrosive and toxic gases
• Quality control

Sectors

• Chemical and petrochemical plants
• Power plants
• Waste incinerators
• Iron and steel industry

The following table lists the measuring conditions for standard applications. The listed values for the measuring range and detection limit are only approximate values. The exact values at the respective measuring point depend on the totality of all influencing variables and can be determined by Siemens for the specific case. Please note that the values for the detection limit and the maximum measuring range refer to an optical path of 1 m. Longer path lengths will improve the detection limit, but not linearly. due to limiting effects such as dust load. The maximum applicable measuring ranges can only be used if permitted by the process conditions such as dust load.

Standard application Effective optical path length: 0.3 … 8 m Dust load2): < 50 g/Nm3			Process gas temperature Tmin … Tmax	Process gas pressure pmin …pmax	Min. measuring range (with 1 m eff. opt. path length)	Max. measuring range (also dependent on eff. opt. path length: see following column)	Max. measuring range x path length	DL x path length (under standard conditions1) without cross-interference of other gases)	Repeatability3)	Purging gas medium
Sample gas component	Gas code	Appl. code
O2	A	B	0 … 600 °C	900 … 1 100 hPa	0 … 1 vol%	0 … 100 vol%	75 vol%*m	200 ppmv*m	2 %	N2
O2	A	C	0 … 200 °C	700 … 5 000 hPa	0 … 1 vol%	0 … 100 vol%	75 vol%*m	200 ppmv*m	2 %	N2
CO	J	C	-20 … 700 °C	700  ... 2 000 hPa, max. 300 °C 800 ... 1 200 hPa, above 300 °C	0 … 100 ppmv	0 … 6 000 ppmv	2 000 ppmv*m	0.6 ppmv*m	2 %	Air, N2

Reference table: Standard applications. The specified pressures are absolute.

DL = detection limit

¹⁾ At 20 °C, 1 013 hPa, without dust

²⁾ With 0.3 m effective optical path length

Average diameter of the dust particles: 15 µm

Specific weight of the dust particles: 650 kg/m³

The influence of dust load is extremely complex, and depends on the path length and particle size. The optical damping increases exponentially at longer path lengths. Smaller particles also have a very large influence on the optical damping. With high dust load, long path length and small particle size, the technical support at Siemens should be consulted.

³⁾ Referred to measuring range.

With stable or externally measured and software-compensated process gas temperature and pressure conditions.

Special applications

In addition to the standard applications, special applications are available upon request.

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