PermeaBOX: Permeation Oven & Calibration Gas Generator

Secure Continuous Analysis with an Integrated, Safe, and Ultra-Precise Reference Gas Source.

Uncompromised detection reliability for your analytical systems.

Designed by Chemlys, the PermeaBOX is a positive-pressure permeation oven. This industrial module delivers a reliable, continuous stream of controlled gas using a certified, temperature-stabilized tube. Specifically designed to secure your ambient air monitoring systems, it ensures daily verification and precise calibration of your gas analyzers..

PermeaBOX: Ease of use and precision for your standard gas generation

The PermeaBOX is an autonomous calibration gas generator engineered to satisfy the most demanding industrial requirements.

The PermeaBOX Guaranteeing reliable standard gas generation for ultra-trace analysis, it features a premium technical design:

  • Ergonomics and safety: Horizontal tubular furnace with quick front accessfor seamless loading and unloading of permeation tubes.

  • Total chemical inertness 100% stainless-steel fluid path and oven with Sulfinert coatingto guarantee complete sample integrity.

  • High-precision regulation: Digital temperature controller coupled with a PT100 sensor, ultra-stable pressure regulator, and dual rotameter for fine-tuning carrier and dilution gas flows.

What are the benefits of PermeaBOX for the safety of your industrial site?

Implementing the PermeaBOX provides a dual strategic advantage for your plant, combining HSE safety with OPEX optimization:

  • Zero 'false negative' reliability: Thanks to the continuous generation of a reference gas, the system performs regular self-checks on the analyzer, sampling lines, and alarm relays. Any analytical failure or missed detection immediately triggers a dedicated alarm.

  • Simplified calibrations and operational cost control: The PermeaBOX eliminates the need for conventional calibration gas cylinders, which are cumbersome and costly to manage. Integrated rotameters enable operators to seamlessly adjust dilution flow rates for stable, high-precision, and state-of-the-art multi-point calibrations.

permeabox permeation oven for trace gas analyser
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To meet demanding industrial standards for durability and accuracy, the PermeaBOX is built around premium-grade components

  • Horizontal tubular oven with direct front access, made of Sulfinert-treated stainless steel
  • Built-in thermal safety fuse with automatic shut-off if maximum temperature is exceeded
  • Dual precision rotameters for carrier and dilution gas fine-tuning, coupled with an integrated pressure regulator

Operating Principle:
Permeation tube calibration is a benchmark method for generating gas mixtures at trace and ultra-trace levels with excellent stability and repeatability. It also provides a solution for calibrating compounds that are unavailable in gas cylinders or unstable in gas mixtures.

Its operating principle is based on a simple, remarkably efficient mechanism:

  • Constant thermal emission: A certified tube, installed inside the PermeaBOX furnace maintained at a strictly constant temperature, provides a continuous release of the target gas at a fixed permeation rate.

  • Dilution and concentration calculation: This gas is swept away and mixed with a dilution flow. The final concentration generated is defined in particular according to the emission rate and total gas flow.

  • Multipoint calibration: By maintaining a fixed temperature, the operator simply adjusts the dilution flow rate via the front rotameters to generate different reference concentration levels.

To define your permeation tube, you need to know the following:

  • The maximum length your oven can accept (15 cm for permeaBOX)
  • The target concentration according to the alarms configured
  • The temperature range available on your permeation oven (up to 80°C for PermeaBOX)

Non-exhaustive list. Contact us for unlisted compounds.

Target compound Target concentration (OEL-based)
Dimethyl sulfate (DMS), CAS No. 77-78-1 50 - 70 ppb
Benzene, CAS No. 71-43-2 50 - 150 ppb
Epichlorhydrin, CAS No. 106-89-8 50 - 150 ppb
BCME (Bis(chloromethyl) oxide), CAS No. 542-88-1 20 - 40 ppb
Trichloroethylene (TCE), CAS No. 79-01-6 50 - 150 ppb
Carbon tetrachloride (CCl4), CAS No. 56-23-5 50 - 150 ppb

Caution: similar to calibration cylinders, permeation tubes feature a finite shelf life. This validity duration is determined by the compound's chemical stability and concentration (hence the liquid volume within the tube), typically ranging from 3 to 12 months.

Find PermeaBOX in particular in our integrated solution control of working atmosphere.

This solution enables online monitoring with multiplexing for detecting dimethyl sulfate at ultra-low levels (< 4 ppb). It integrates an industrial GC, a smart stream selector, and a PermeaBOX

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