Perma Pure is a leading innovator in the field of gas sample conditioning. We use Nafion®, along with a broad array of technology and expertise, to help our customers analyze gas stream samples safely and accurately. We serve a variety of markets, including Medical, Scientific, Hydrogen Fuel Cell and Environmental Monitoring. Perma Pure LLC is a Halma company, and as a result has access to technology, investment, and manufacturing in support of a global business. More than half of Perma Pure’s sales are outside the United States.
Nafion was developed as an improved material for electrolysis membranes in chlor-alkali production, where salt solutions are separated for production of chlorine and sodium hydroxide. While its extreme corrosion resistance was required for this application, Nafion’s very selective permeation by water was a serendipitous development. Perma Pure was founded in 1972 to exploit these properties for gas drying and humidifying applications.
Perma Pure purchased a license from DuPont for the technology to manufacture tubing from Nafion in 1978 and remains the sole manufacturer of Nafion tubing. In 1992, the founder retired and Halma Holdings, the North American arm of London-based Halma plc, acquired Perma Pure. Under Halma’s direction, Perma Pure has expanded its operations to include a wide range of gas sample conditioning products. Today, Perma Pure dominates the worldwide market for drying breath and is rapidly expanding its share of the high-performance gas conditioning market.
Halma p.l.c., the parent company of Perma Pure, is a holding company with subsidiaries operating predominantly in the following market sectors:
environmental control
fire detection
gas detection
safety
security
Halma was founded in 1894, but its present era of expansion into these target market sectors began in 1972. Since that time Halma has won several Queen’s awards for environmental services while consistently growing for the last 25 years.
A Halma head office team sets policy guidelines and provides financial and publicity services to operating subsidiaries. Subsidiaries are based in the United States, the United Kingdom, Japan, Brazil, the Netherlands, France, Germany, Italy, Australia, Canada, India, Malaysia, China and Singapore.
Dryers Products
Perma Pure' s MD Series™ and PD Series™ dryers are the ideal choice for drying gas samples prior to analysis. Using our exclusive Nafion® technology, Perma Pure dryers can reduce the sample dew point to as low as -45°C without any measurable loss of analytes. The exceptional corrosion resistance of Nafion® allows for the conditioning of harsh samples, even those rich in acids like HF and HCl.
PD™ Dryers
ME™ – Series Moisture Exchangers
Based Sample Conditioning Systems Products
Perma Pure offers the most complete range of sample conditioning technology for CEMS and process measurements. The Baldwin™ Series line of thermoelectric coolers and probes is well known for quality, reliability and value. Some applications require removal of moisture in vapor phase to avoid unintended loss of analytes which dissolve in condensing water. Nafion® membrane drying systems by Perma Pure offer this alternative sample conditioning technology.
The Micro-GASS™ systems prepare gas samples for analysis by electro-chemical sensor (ECS) analyzers when the sample is hot and wet. These sensors are a very reliable means of detecting the presence of toxic or explosive compounds in a gas stream but in moisture-saturated samples, sensor life is greatly reduced due to condensation within the cell and subsequent leakage of electrolyte. ECS can also be used with corrosive samples like stack gases, but also suffer reliability problems when the sample humidity is too wet. The Micro-GASS system reduces sample humidity to the ideal range for ECS, typically 30 to 70% R.H., while also removing any dust or dirt particles present.
