G-Cal Permeation Devices from VICI Metronics

permeation tubes
  • Excellent for use in the field
  • Can be operated at room temperature
  • Can handle arsine and phosphine
  • Longer life than Dynacal® devices

This is just a sample of what we offer. If you need something not on this list, contact Metronics.

Chemical name CAS
Acetaldehyde 75-07-0
Ammonia 7664-41-7
Ammonium Carbamate 1111-78-0
Arsine 7784-42-1
Benzene 71-43-2
Carbonyl Sulfide 463-58-1
Dimethyl Ether 115-10-6
Ethyl Mercaptan 75-08-1
Hydrogen Sulfide 7783-06-4
Methanol 67-56-1
Methyl Mercaptan 74-93-1
Phosphine 7803-51-2
Sulfur Dioxide 7446-09-5
Toluene 108-88-3
Water 7732-18-5

Hide list

G-Cal permeation tubes offer a proven and repeatable means of generating a desired gas or vapor concentrations. The permeant gas escapes through the proprietary membrane system and mixes with a carrier gas (nitrogen is the most common) at a controlled flow rate to obtain a known mixture in ppm or ppb. Applications include calibration of gas monitoring systems and chromatographs, accuracy check of gas detectors, and generation of known test atmospheres for a specific application.

G-Cal devices exhibit the lowest temperature sensitivity among available similar products. The permeation rate of the polymer used in G-Cal devices changes only 1-3% per degree C, eliminating the need for a temperature-controlled chamber. Most G-Cal devices are guaranteed for 12 months operating life.

Over 100 different substances are available, including arsine, phosphine, and gas phase devices such as CO, NO, and methane. Available permeation rates range from less than 200 ng/min to 30,000 ng/min and over. Each G-Cal device is individually calibrated and vertified to generate a given output (ng/min) vs. temperature. A graph which shows permeation rate vs. temperature from 0 to 50°C is included with each device.



Contact us for more information about any of these products.

Tees must be ordered separately.

  • Stainless steel
      P/N GC5025
  • PTFE
      P/N GC5020