Gastec P-181-H Permeation Tube Dimethylamine

Description

The P-181-H contains liquefied Dimethylamine under its own vapor pressure. When placed in a temperature-controlled environment, the gas permeates through the tube’s wall at a fixed, repeatable rate. By passing a controlled flow of diluent gas (such as dry nitrogen) over the tube, you can create accurate calibration mixtures in the ppm (parts per million) range.

The “H” designation indicates this is a High-rate tube, providing a greater mass of gas per unit of time compared to standard “L” (Low) or mid-range tubes.

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.

Specifications

Feature	Specification
Chemical Name	Dimethylamine ( $(CH_3)_2NH$ )
Gastec Model	P-181-H
Concentration Series	High (H)
Primary Compatibility	Gastec PD-2, PD-1B, or PD-1C
Typical Temperature	35°C to 50°C
Storage Requirement	Refrigeration (typically $0-5^circ C$ ) is recommended to preserve life.

Features

Consistent Mass Flow: Provides a constant output that is far more reliable than gas cylinders for this specific chemical.
Traceable Accuracy: Each tube is individually calibrated by weight loss, allowing for NIST-traceable gas standards when used with calibrated flow controllers.
Temperature Sensitivity: The permeation rate is highly predictable based on temperature; precisely controlling the oven temperature allows for fine-tuning of the final concentration.
Safe Storage: Contains only a small volume of the chemical, significantly reducing the hazard profile compared to large gas cylinders.
Long-Term Stability: When stored correctly, these tubes maintain their permeation rate for several months of active use.

Applications

The Gastec P-181-H Permeation Tube Dimethylamine is indispensable for industries requiring strict monitoring of amines:

Chemical Processing: Ensuring sensors accurately detect Dimethylamine leaks in production and synthesis areas.
Wastewater Treatment: Calibrating equipment used to monitor byproduct gases and odor control systems.
Laboratories & Research: Serving as a stable gas source for analytical instrument development and toxicological studies.
Occupational Health: Regular validation of safety sensors to ensure compliance with permissible exposure limits (PEL).