Gas Standards Generators

491M Modular System

This modular system is for multipoint, multicomponent calibration of most types of gas analysers such as GC's, GC-MS, FTIR & Ion Mobility Spectrometers. The 491M has a concentration range of sub-ppb to 50%, depending on the compound and modules selected. This broad concentration range, plus the pressurised sample delivery system, humidification module, secondary dilution module, analyser interface module and extra permeation tube oven modules allow the user to custom configure the instrument to the application. This instrument uses all types of permeation tubes. The humidification module humidifies the standard up to 80% relative humidity.

Span Pac I

This generator is used for multipoint, multicomponent calibration of process gas analysers and continuous emissions monitors. The Span Pac I uses Trace Source™ Permeation Tubes to provide ppb to 1,000 ppm standards, depending on the compound. It is specifically designed for field mounting and can be operated from a remote station. Multiple permeation tube ovens can be housed in a single NEMA 4 cabinet. Also available with Z purge.

Span Lab Autoblend

This is a modular design with the basic system includes seven flow modules, and one electronics module.The Span Lab™ Complex Mixtures Generator is a group of up to 30 individually controlled permeation tube ovens. Each oven is self-regulating at a preset, fixed temperature. The carrier flow through each oven is individually controlled.

Permeation tubes in these ovens emit a small, precisely known flow of each component compound into a small carrier gas flow through each oven.

The output from each oven is selectively added to a controlled flow of dilution gas. The output from any combination of permeation ovens can be added.The composition of the calibration can be changed to meet varying demands.

The dilution flow is measured by an electronic mass flowmeter and digitally displayed. The indicated total dilution flow includes flow from the selected ovens. The standard total dilution flow is 0.25 to 5
l/min., with optional ranges to 50 l/min