Specialist in Optoelectronics

Optical Cells

Our infrared LED's cover five wavelengths: 1.8, 2.8, 3.3-3.8, 4.2 and 4.8 micron. These wavelengths match the dominant absorption wavelengths for water, hydrocarbons, carbon dioxide and carbon monoxide.

Combining the technologies of high frequency pulsed infrared LED's and infrared detectors, LMS offer a family of optical cells for measuring water, hydrocarbons, carbon dioxide and carbon monoxide with a concentration range from 10ppm to 100%.

CD-5 Optical Gas Cell

LMS supplies all options:
{short description of image} Separate LED's / detectors,
{short description of image} LED's and detectors inside an optical cell or
{short description of image} Complete packages with digital outputs.

An Optical Cell Evaluation Kit (OCEK) with connection to a PC via RS 232 port is also available.
Our OCEK includes:

{short description of image} Gas cell
{short description of image} Embedded microprocessor
{short description of image} Analogue / digital circuits
{short description of image} IBM PC-compatable software

OCEK advantages:
Infrared LED's can be pulsed at high frequency for optimising signal-to-noise ratio and power consumption. Narrow bandwidth LED's eliminate the need for filters. Evaluation Kit accepts pyroelectric, photoconductive and photovoltaic detectors. Optional thermoelectric controller with PC control for easy evaluation of Peltier cooled emitters and detectors. Software includes experiment programming, graphics, customed linearisation.

Typical applications:
{short description of image} Water vapor concentration at low temperature
{short description of image} Hydrocarbon concentration from 1000ppm to 100% methane
{short description of image} Carbon dioxide from 300ppm to 25%.

Two gas monitoring:
{short description of image} Carbon dioxide and methane at landfill sites
{short description of image} Nitrous oxide/ carbon dioxide monitoring in greenhouses and horticultural uses
{short description of image} Leak detection: petroleum and natural gas facilities
{short description of image} Combustion analysis for TOC etc
{short description of image} Alarm detection where interfaces with electrchemical cells invalidate their use.

This evaluation kit will operate with visible and UV optical cells.

For applications advice, or to place your order, please contact:
Laser Monitoring Systems