• Infrared and PID Sensors Ensure Workplace Safety


Infrared and PID Sensors Ensure Workplace Safety

Aug 05 2009

The Microtector II G460 from GfG (Germany) measures up to 7 gases simultaneously in ambient air for increased workplace safety. The sensor slots can be equipped individually. Different detection principles are available for optimal measuring results.

For increasing the user’s safety, the Microtector II G460 detects carbon dioxide by means of a selective infrared sensor (NDIR). This sensor provides long-term stable detection values. Unlike electrochemical sensors, IR technology is not subject to cross sensitivity from toxic hydrogen sulphide. The Microtector II G460 is the smallest detector world-wide which can be equipped with both an infrared sensor and a PID.

Photoionisation detector (
PID) equipped instruments are increasingly viewed as the best choice for measurement of VOCs at exposure limit concentrations.  Familiar substances containing VOCs include the vapours associated with fuels such as gasoline, diesel, heating oil, kerosene and jet fuel. The category also includes many specific toxic substances such as benzene, butadiene, hexane, toluene, xylene, and many others.  Most VOC vapours are flammable at surprisingly low concentrations.  For most VOCs, however, the toxic exposure limit is exceeded long before readings reach a concentration high enough to trigger a combustible range alarm. 

The loop data logger records gas concentrations and alarms over a period of up to 50 hours. This data can be transferred to a PC to be displayed and evaluated. The data logger has a storage capacity of 1800 measuring points per gas. Storing intervals and mode (average, peak, instantaneous values) are programmable individually.

Inaccessible areas, like tanks and containers, can contain lethal gas mixtures. With the G400-MP1 an attachable high-performance pump is available that can sample the gas from up to 100 metres away. The pump and tube is attached easily and has its own power supply does not affect the operational time of the instrument.

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