Gastec P-136-H Permeation Tube Methyl Bromide

Description

The P-136-H tube contains liquefied Methyl Bromide. When maintained at a constant temperature, the gas permeates through the tube’s walls at a predictable, repeatable rate. By controlling the flow of a diluent gas (usually dry air or nitrogen) over the tube, technicians can create highly accurate calibration standards in the parts per million (ppm) or parts per billion (ppb) range.

Brand

Gastec

Although, technology is always evolving, one demand on our products never changes: the demand for customer safety. Whenever we contribute to customer safety, we are presented with an opportunity to develop further.

GASTEC holds this corporate creed of safety and development in high esteem, as it strives to grow while always putting customer safety first.

Features

Traceable Accuracy: Provides a reliable alternative to bulky and often unstable gas cylinders for low-level calibration.
Long Shelf Life: When stored correctly (typically under refrigeration), these tubes remain stable for extended periods.
Temperature Dependent: The permeation rate is highly sensitive to temperature; an increase of 1°C can result in a 10% change in the permeation rate, allowing for fine-tuned concentration adjustments.
Compact Design: Small footprint makes it ideal for portable calibration kits and tight laboratory environments.
Safety Optimized: Contains a very small total volume of the hazardous chemical, reducing the risk compared to high-pressure gas cylinders.

Specifications

Feature	Specification
Chemical Name	Methyl Bromide ( $CH_3Br$ )
Gastec Model	P-136-H
Typical Range	High Concentration (H-series)
Compatibility	Gastec PD-2, PD-1B, or similar ovens
Primary Use	Calibration of Gas Detectors / GC
Storage Requirement	Cool, dry place (Refrigeration often recommended)