© Siemens AG 2010 High-precision in-situ Gas Analyzer SITRANS SL Remote sensing of gas concentrations directly in the process SITRANS SL is the new in-situ technology pace maker for process control, even in a harsh environment. The gas analyzer combines proven-in-use technology with a compact and robust in-situ design. Powerful features of SITRANS SL are the integrated laser diode and the reference gas cell. This technology allows laser locking completely independent of process gas concentrations. This leads to extremely stable operation, negligible drift values and extended maintenance intervals. Allied to state-of-the-art communication capabilities, these features make SITRANS SL the best performing in-situ laser gas analyzer available today. SITRANS SL is the perfect solution for single-point measurement applications in rough or hazardous environments. SITRANS SL Answers for industry. s © Siemens AG 2010 Mode of Operation Benefits Incorporating tunable diode laser-based technology, this in-situ device enables high-performance measurements. The sensors (transmitter and receiver) are mounted directly on the process, with no need of sampling systems. Laser light is sent from the transmitter, passing through the process gas, arriving at the detector on the receiver side. The measurements are carried out on-line with a very short response time, permitting fast and effective process control. The operating principle allows measurements to be almost independent of interference from other gases, dust or aerosols. Other process influences, such as pressure and temperature, are easily eliminated due to the excellent inherent compensation capabilities of this technique. An in-line reference cell filled with a non-interfering reference gas provides unique user benefit in terms of long term stability with minimum need for maintenance and recalibration. This allows higher availability and lower maintenance cost. • In-situ measurements – no gas sampling required • In-line reference cell – stable instrument operation with outstanding performance • Dynamic dust load compensation • Fast response time • Almost no cross interference • ATEX version for Ex zones I and II (ATEX II 2 G Ex de IIC T6 / II 2 D Ex tD A21 IP65 T85°C) • FM version for Ex zones Div. 1 (FM XP/Class I/Div. 1/ABCD/T6 Ta=55°C; FM Cl. I/Zone 1/AEx d IIC T6 Ta=55°C; FM DIP/Cl. II, III/Div. 1/EFG/T6 Ta=55°C; FM Cl. II/Zone 21/AEx tD 21 T85°C/ Type 4X/IP65) • Enhanced communication integrated in the "Totally Integrated Automation" (TIA) platform concept • Unparalleled cost / performance ratio for single-point measurements • Low maintenance, easy to align and service Technical Specifications Gases O2, CO1) Measuring range O2: 0 … 1 Vol% up to 0 … 100 Vol%2) CO: 0 … 100 ppmv up to 0 …1 000 ppmv2) Detection limit4) O2: 200 ppmv CO: 0.6 ppmv Repeatability4) < 2 % of measuring range Effective optical path length 0.3 ... 8 m Process gas pressure/temperature O2 version (B): 900 … 1 100 hPa/0 … 600 °C Applications O2 version (C): 700 … 5 000 hPa/0 … 200 °C CO: 900 ... 1 100 hPa/0 … 700 °C or 900 … 2 000 hPa/max. 200 °C with same version Depending on the actual plant situation and in accordance with local regulations, typical applications for SITRANS SL are: Response time (min. T90) 1 ... 3 s, application dependent Power supply 24 V DC Electrical connections • Process monitoring and control (chemical industry) • Process optimization (steel industry) • Off-limit monitoring, i.e. minimum or maximum concentration for explosion protection • Combustion control (boilers, waste to energy plants) 2 analog inputs/outputs3) 1 digital input 2 digital outputs PROFIBUS DP V0 (optional) Modbus (optional) Protection IP65 Flange type Alternatively: DN50/PN25 or ANSI 4'' Class 150 Siemens AG Industry Sector Sensors and Communication Process Analytics 76181 KARLSRUHE GERMANY www.siemens.com/processanalytics 1) For information about additional gases please contact your nearest Siemens representative 2) Dependent on process conditions and effective optical path length 3) 4…20 mA, isolated, specified for external temperature / pressure sensors (optional use) Subject to change without prior notice © Siemens AG 2010 4) Value at standard conditions: - process gas temperature 20 °C (68 °F) - process gas pressure 1013 hPa - effective optical path length 1 m (39’’) - without influence of other process gases - no influence by dust For application-specific data please contact your nearest Siemens representative The information provided in this brochure contains descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Availability and technical specifications are subject to change without notice. All product designations may be trademarks or product names of Siemens AG or supplier companies whose use by third parties for their own purposes could violate the rights of the owners.