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Sitrans SL diode laser gas analyser from Siemens

SITRANS SL diode laser gas analyser

Siemens  have further developed their TDL technology with the Sitrans SL diode laser gas analyser featuring an in-line reference cell filled with a non-interfering reference gas allowing for a fast and non-contact measurement of gas concentrations in process or flue gases.

The Sitrans SL diode laser gas analyser can be used in various industry and applications such as process control in the chemical industry, process optimisation within the steel industry and as combustion control for boilers and municipal waste incinerators.

The Sitrans SL diode laser gas analyser is also an effective device for measuring minimum or maximum concentrations limits for oxygen in explosive proof environments.

The measuring principle of the Sitrans SL diode laser gas analyser is based on the specific light absorption of different gas components using light from a laser diode that is sent from the transmitter through the process gas to the detector on the receiver side.

As the band width of the laser light is narrow, only the gas component of interest will interact with it. Other process influences, such as dust and temperature, are easily eliminated due to the strong compensation capabilities of this technique. The characteristics of the laser allow single-line spectroscopy free of interferences.

This new technology carries out all the measurements on-line with a short response time permitting fast and effective monitoring of critical processes.

The transmitter and receiver sensors are mounted directly on the process with no need for sampling systems and are designed for operations in harsh environmental conditions.

There are no calibration gases required which is a cost saving both in expensive gas bottles and time offline for recalibration.

The Sitrans SL diode laser gas analyser consists of a cross-duct sensor pair – transmitter and receiver. The entire analytical instrument is fitted into these two enclosures, which are interconnected with one cable.

Another cable is connected from the receiver providing the power and the customer interface. The receiver hosts a Local User Interface (LUI) which is operated with an IR remote control.

Due to this modular design, the Sitrans SL diode laser gas analyser can be maintained quickly and easily reducing overall maintenance and recalibration costs.

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All-inclusive kit for checking energy meters in heating, ventilation and air conditioning applications available from Siemens (12-Nov-2008)
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