LaserGas^TM II Monitors

LaserGas II monitors, using tuneable diode laser (TDLAS) technology, are the gas analysers of choice where in-situ gas analysis, high sensitivity, freedom from interference and fast response time is required. They can measure a range of important emission and process gases at low ppm or ppb concentrations.

Unlike conventional UV or IR spectrographic instruments, LaserGas instruments employ the measurement principle known as nullsingle line spectroscopynull, which eliminates cross interference from other gases and enables very low concentrations of gas to be detected (see Technology for more information). The LaserGas technology was introduced to the market in 1995 and since employed in more than 1000 LaserGas monitors worldwide, underlining that TDLAS is a well-proven and reliable technology for demanding industrial applications. LaserGas I, the predecessor of the present generation is still available and is TV approved for HCl measurement. Press here for more information on LaserGas I.

A range of dust monitors is also available, LaserDust for stacks and the DM4 for open path dust monitoring.

Features

Designed for continuous monitoring, LaserGas II models offer high sensitivity with detection limits in the ppb and low ppm ranges. Fast response times of down to one second are possible depending on the specific application. The range includes models for measuring O2, HCl, HF, NH3, CO, H2S, CH4 as well as for measuring two different gases simultaneously with a single laser (see Table of Gases below). Gas detection is unaffected by dust and smoke or fog and rain and measurements down to 1% transmission are possible. No compensation is required for the presence of other gases. Automatic correction for temperature and pressure variations is included.

LaserGas II monitors are very compact and robust instruments suitable for outdoor use. The transmitter and receiver units include all necessary electronics and are protection classified to IP66.

As an important new feature LaserGas II includes an Ethernet connector to enable communication via the Internet.

Laser Gas II monitors are fully configured to customers needs and tuned to the specific process, to ensure optimum performance and zero cross interference from other gases.

Maintenance and calibration

The easy installation and operation together with a minimum of routine maintenance contribute to the instruments low cost of ownership. Moreover, LaserGas II monitors incorporate fault diagnostics providing warning messages if maintenance should be required. Due to the modular hardware design most maintenance can be done on site by replacement of modules, thereby increasing the availability of the instrument.

There are no moving parts and no consumables are required. Calibration intervals are typically 6-12 months and zero drift is negligible.

Configurations

The following instrument configurations are available in the LaserGas II product line:

• Single Path monitor (stack measurements)
• Dual Path monitor (stack measurements)
• Open Path monitor (long distance monitoring)
• Multipass monitor (extractive trace measurements)

Table of Gases

* other gases available on request
** refer to instrument configuration sections for detection limits