EM27是开放光路遥测遥感红外检测系统、用于远处危险气体的定性定量分析。它的核心采用布鲁克公司专利的 RockSolid™干涉仪，具有极好的稳定性。内部校准的光源可以自行检测、校准辐射强度。测试时间快（少于1秒），

EM27开放光路红外光谱仪

可以进行实时场扫描。整个仪器坚固、轻便，抗震能力强，温度适应范围宽，能用于野外恶劣环境。

布鲁克 EM27 特点:

操作容易
坚固、一体设计
轻便
耗电量低
测量与分析速度快

EM27系统可配置两种不同模式：主动模式，测量气体或气溶胶对红外光源的吸收光谱；被动模式，即测量物质的自然红外辐射谱。

Open Path FT-IR for Volcanic Gas Analysis

A Bruker OPAG-22 spectrometer (forerunner of EM27) used at Etna mountain since March 2000 by Sistema Poseidon Geochemistry Group, in the first long-term study of variations in volcanic gases using a portable FT-IR.

Volcanic gases have significant effects on the atmosphere and climate and are important indicators of sub-surface magmatic processes. They are, however, difficult to collect and analyze. In-situ sampling can provide detailed information on trace constituents but is often impractical or hazardous. More recently, experiments with rugged FT-IR spectrometers have shown to be extremely well-suited to volcano monitoring, the main advantage being that the FT-IR records all wavelengths simultaneously, and thus allows quantitative determination of the instantaneous composition of volcanic gases.

Experiments were also been carried out using the spectrometer from a helicopter, pointing into the summit craters of Etna, and back on the ground to measure fumaroles on the summit of Vulcano. The high sensitivity and robustness of the Bruker OPAG-22 spectrometer are ideal for working in this difficult environment, and allow high quality measurements to be collected using a variety of measurement strategies on Etna, Vulcano and Stromboli volcanoes.

Etna is the first volcano in the world to be routinely monitored using FT-IR. The Bruker OPAG-22 instrument has been demonstrated as a robust, reliable and efficient tool for a variety of remote sensing applications on Italian volcanoes, including measurements of lava fountain gas composition and helicopter-borne measurements of the summit craters of Etna.

Content taken from Dr. Michael Burton's abstract, "Remote sensing of volcanic gases with the Bruker OPAG-22" and special thanks to the Sistema Poseidon Geochemistry Group. For more information and the complete abstract, please visit