KIN-TEK Laboratories, Inc.

Dopant Permeation Tubes
These dopant permeation tubes can be used to detect trace concentrations of narcotics, explosives, chemical warfare agents (CWAs), and industrial airborne molecular contaminants (AMCs). The detection systems are based on ion mobility spectroscopy (IMS) and are suitable for such applications as plant security and atmospheric monitoring of manufacturing operations. The basic dopant tube is a small plastic cylinder with the pure dopant compound sealed inside. A small stream of the dopant vapor is dispensed slowly and continuously into the detection system’s sample stream, where it reacts to enhance detection of the target compound. Several configurations and kits are available for specific applications: the narcotics detection kit contains three tubes that emit ammonia vapor, supplied as a set and shipped in a metal cylinder; the explosives detection kit contains a single tube that emits dichloromethane supplied in a plastic shipping tube. Additional common dopants include acetone and dimethyl methyl phosphonate (DMMP). Other materials are available for specialty applications.

AutoBlend gas-blending system
AutoBlend is a computer-controlled, multichannel gas-blending system that uses permeation tubes to add multiple trace components to the flowing gas stream, in concentrations from hundreds of parts per million down to a few parts per trillion. The device features six independently controlled permeation channels, each of which can contain up to eight compounds. Component concentrations can be varied independently, making the AutoBlend well-suited for conducting statistically designed test programs. Mixtures can be supplied dry or humidified and can be delivered at up to 20 psig pressure.

FlexStream modular gas-standards-generating system
The new FlexStream modular gas-standards-generating system uses proprietary Trace Source permeation tubes that add precise concentrations of sulfur compounds to nitrogen, ethylene or propylene matrices. Typical polymerization processes require monomers with concentrations less than 1 ppmw total sulfur, less than 1 ppmw H2S, and less than 50 ppbw of COS. Calibration standards at those levels are not readily available and tend to be unstable in storage. The FlexStream system is configured with two permeation ovens and a secondary dilution module, and it can produce mixtures containing H2S, COS, and a range of higher-boiling sulfur compounds (such as dimethyl sulfide and thiophene) to assure accurate desired total sulfur levels. An internal microprocessor system sets dilution flows and selects the proper operating mode to create specific concentrations.

491M-PB module
The 491M-PB module is a pressure balance accessory that enables the 491M modular gas-standards generators to maintain steady gas pressures. At trace concentrations (e.g., ppm, ppb, and ppt) of reactive gases, surface adsorption within the system can significantly alter the actual mixture concentration that is delivered. The 491M module eliminates concentration fluctuations by providing a stable reference pressure for all of the mixture flow paths. This reference pressure is balanced to the system operating pressure to ensure stable delivery concentration, even during operating mode changes in either the 491M standards generator or the analytical system that is being tested.

Span Pac H2O-R moisture-standard generators
Span Pac H2O-R moisture-standard generators create known calibration standards for trace moisture in reactive gases, including chlorine and HCl. They employ the standard additions technique, in which a small flow of dry inert gas flows over a permeation tube to create a base moisture standard. Measured amounts of the base mixture are then added to a flow of the reactive gas to create the standard. Permeation tubes cover concentrations ranging from <10 ppb to >100 ppm. Multi-point calibrations over a 400:1 range are easily achieved at any concentration level. They can be used in moisture monitor calibration, moisture probe validation, filter capacity testing, and adsorption testing.

AutoBlend Complex Mixtures Generator
The AutoBlend Complex Mixtures Generator is a multi-channel, computer-controlled blending system that uses permeation tubes to create trace concentration gas mixtures. Component concentrations can be independently varied, rendering the instrument ideal for sensor testing and methods validation. During operation, the permeation tubes that are installed in each channel emit a small, precisely known flow of each component compound. The computer system controls the proportionate combination of flow from the various channels with a precisely controlled carrier-gas dilution flow to form the mixture for each channel. Mixtures containing up to 48 compounds can be dry or humidified in nature, and delivered at pressures up to 20 psig. The concentration of each component in a mixture is traceable to NIST through physical standards.