GM700 | SICK 8010772/2015-10

Subject to change without notice

Flexible gas analysis over the entire line

Measuring difcult, selective gas components such as ammonia (NH

), hydrogen uoride (HF),

and hydrogen chloride (HCI) is a major challenge for process analysis and emission monitoring.

The GM700 in-situ gas analyzer opens up new options here. With unparalleled exibility – without

the need for test gases.

The GM700 gas analyzer operates reliably and efciently.

Thanks to its innovative in-situ measuring technology, the

analyzer can be mounted at the measurement location directly

in the duct through which the gas ows. The benets: time and

cost savings thanks to simple installation and commissioning,

low maintenance requirements, and very short response times.

The GM700 delivers a high-resolution measurement using

direct laser spectroscopy (see below) with a precisely adjust-

ed spectral line. The result: fast and undistorted recording of

measuring gas concentrations without time-consuming gas

extraction, conditioning, and cost-intensive transportation. Gas

components that can be measured by the GM700 include: NH

HF, and HCI.

Technology and principle of operation

Laser spectroscopy

(tunable diode laser spectroscopy, TDLS)

In laser spectroscopy, the laser beam from the sender is

sent through the gas to be measured to the reector. From

there, it is reected back to a sensitive detector (photo

diode) in the sender/receiver unit. The wavelength of the la-

ser diode is adjusted to a spectral line of the measuring gas

component. This is scanned by modulating the wavelength

and recorded by the photo diode of the detector. A signal

evaluation then provides the gas concentration based on

the wavelength-specic absorption of the measurement

signal. The TDLS principle therefore allows gas components

in a gas mixture to be measured selectively.

Dimensions in nm

400 1600

spectrum

≈1512