Partnerships

Addium

logo tdl2

Addium, (formerly Decagon Devices and Meter Group) has partnered with Southwest Sciences via a license to develop a diode laser-based instrument for measurement of moisture (water activity) in food and pharmaceuticals packaging. The particular advantage of the laser approach is that it can measure moisture content accurately, without interference, in the presence of volatiles that are found in certain products (e.g. soy sauce, tobacco products, even alcohol). 

Addium TDL series
The Addium TDL series of products measures water activity in food and other packaging with unprecedented accuracy and without interference from volatiles.

Servomex

science partners servomex logoServomex, working with Southwest Sciences, developed the Nano-Trace moisture analyzers for detecting water contamination in semiconductor process gases at levels below one part per billion. The product line now includes trace and ultra-trace moisture analyzers as well as combination instruments with oxygen sensors.

Delta F 700 analyzers
The DF 700 analyzers measure moisture to below 1 part per billion

The DF 700 Series analyzers use Southwest Sciences’ award-winning TDLAS technology to measure moisture in gases. TDLAS is a spectroscopic technique that utilizes a diode laser as its light source. TDLAS has advantages over other techniques because the moisture sample only comes in contact with a few optical components that are made from very robust materials. It works according to the fundamental principle of Beer’s law, therefore, the reading is stable over time and does not even require calibration.

The TDLAS technology is extremely selective. The laser wavelength is chosen to probe water without interference from other gases. Accurate, reliable measurements are obtained, even in corrosive gases such as HCl or ammonia.

The trace moisture analyzer was developed by a partnership between Servomex and Southwest Sciences.

LI-COR

 
LI-COR 7700 CH4 analyzer
Featuring low electrical power and high sensitivity, the LI-COR 7700 CH4 analyzer is designed for extended deployment in remote locations

LI-COR has developed the LI-7700 open-path CH4 analyzer for measuring methane fluxes over ecosystems. The open-path approach eliminates the need for pumps and tubing, simplifying both deployment of the instrument and interpretation of the results.

The measurement approach is based on Southwest Sciences’ award-winning wavelength-modulation spectroscopy (WMS) technology. The current injected into the laser is modulated at about 1 MHz, causing the wavelength to be modulated as well. A multi-pass Herriott cell provides the optical path of about 30 m in a compact, 1/2 m long instrument. The light transmitted through the multipass cell is detected, demodulated, and digitally processed to determine the methane concentration with parts per billion sensitivity. More details are available at the LI-COR website