PermeaterPD-1C

Even calibration gas of very low concentrations can be continuously generated.

The Permeater is a gas generator for calibration purposes that utilises permeation and diffusion tubes to generate the calibration gas.

Gas for calibration can be generated continuously for longer periods of time
Calibration gas can be easily generated in a wide range of concentrations
Highly reliable as concentration is determined by measuring basic physical quantities such as weight loss and dilution gas quantity
Many types of low concentration calibration gases can be generated
Automatic calculation of the dilution gas flow rate when the desired gas concentration to be generated is entered on the touch screen
Mass flow controller (gas flow controller) controls flow changes

Specifications

Generating calibration gas with a permeation tube

A permeation tube is a fluororesin tube that contains high-grade liquefied gas. When the tube is exposed to a certain temperature, liquefied gas penetrates the tube wall by osmosis in time-increments enabling a specific quantity of gas to be retained in the tube. Consequently, a carrier gas flowing at a constant speed (for calibration purposes) can be continuously generated by keeping the tube at a fixed temperature and infusing a constant quantity of dilution gas. This method is highly reliable because the concentration of the calibration gas is determined by calculating the decrease in weight of the permeation tube and the quantity of dilution gas. This dynamic method also enables highly reactive gases such as hydrogen sulphide or ammonia to be generated. As shown in the table below, there are many different kinds of Permeation tubes and they are widely used because they can provide a stable supply of calibration gas.

Permeation tubes
Calibration gas name	Catalogue No.	Concentration range (ppm)
Ammonia	P-3	0.2-17.9
Ammonia	P-3-M	0.3-40.8
Bromine	P-10-H	0.016-2.52
Chlorine	P-8-5	0.15-16.4
Chlorine	P-8-M	0.5-53.1
Dimethyl disulphide	P-73-H	0.003-0.45
Dimethyl sulphide	P-74-H	0.04-6.3
Ethyl mercaptan	P-72-H	0.04-1.87
Formaldehyde	P-91-H-5	0.0049-0.24
Hydrogen sulphide	P-4	0.1-13.6
Methyl chloride	P-132-H	1.6-77
Methyl mercaptan	P-71-5	0.007-1.52
Methyl mercaptan	P-71-H	0.16-11.4
Methylamine	P-182-H	0.5-25.6
Methylene chloride	P-138-H	0.3-15.8
Propane	P-100	0.03-1.9
Propylene oxide	P-164-H	0.3-15
Styrene	P-124-H	0.0045-0.22
Sulphur dioxide	P-5-5	0.04-3.6
	P-5	0.1-7.2
	P-5-H	1.1-76.4
Trimethylamine	P-180-H	0.06-3.1
Vinyl chloride	P-131	0.05-3.7
Vinyl chloride	P-131-H	0.8-58
Vinylidene chloride	P-130-H	0.16-8.2

Generating calibration gas with a diffusion tube

The diffusion tube method is used for the preparation of substances that are generally liquid*1 at room temperature, such as organic solvents. A diffusion tube with a certain inner diameter is filled with a liquid preparation gas using a syringe, which is maintained at a constant temperature so that the evaporation and diffusion of the liquid in the tube is constant and a constant flow of dilution gas can be fed into it to continuously generate desired low concentration of the calibration gas.
The diffusion tube is a glass container consisting of a diffusion tube with a fixed inner diameter and a liquid reservoir. The diffusion rate is proportional to the cross-sectional area of the diffusion tube and inversely proportional to its length.

*1 Although not a common application, gases of substances that are solid at normal temperatures can be generated using gas diffusion tubes. Please contact your GASTEC representative for information regarding specific substances.
*2 This method cannot be applied to substances with extremely high or low vapour pressure or substances with decomposability, corrosiveness, hygroscopicity or polymerizability due to their diffusion rate not being constant.

How to use the Permeater

Operating procedures

Setup procedure (touch screen operation)

Specifications

Name of Gases to be generated	●Permeation Tube Method Stable, high-purity substances with boiling points in the range -60 to +30 ℃ as gas properties. ●Diffusion Tube Method Stable, high purity substances with vapour pressures in the range 5-400 mmHg at temperatures between 30 and 50 ℃ as liquid properties.
Dilution gas	Nitrogen or Air
Dilution gas pressure	0.15 - 0.6MPa
Flow rate setting range	0.2 - 10L/min
Flow rate setting accuracy	0.2 - 0.4L/min：±13.2% s.p. 0.4 - 1L/min：±7.0% s.p. 1 - 10L/min：±3.7% s.p.
Operation temp. range	(Room temperature +5℃)–50℃ *1
Temperature setting accuracy	±0.15℃
Tube Holder Capacity	Permeation tube　Standard size : 10pcs. 　　　　　　　　　　 H size *2 : 5pcs. Diffusion Tube for D-10, D-20, D-30: 1pcs. For Multi-type Diffusion Tubes: 4pcs.
Power supply, Max power consumption	100-240V AC 50-60Hz 160W
Dimensions	250(W)×340(H)×315(D)mm
Weight	Approx. 14kg (without water)
Standard accessories	Tube for calibration gas(FEP Tube O.D. φ6 x I.D. φ4mm 2m) × 2, Tube for dilution gas (with dust filter) (O.D. φ6 x I.D. φ4mm 2m）× 1, Power Cord × 1 3, Conversion adapter × 1 3, Rubber Stopper × 1, Tube hoding cage × 1, Funnel × 1, Spanner × 1
Standards	Low Voltage Directive EN61010-1 EMC EN61326-1 (For use in industrial locations) RoHS EN IEC63000
*	1 Room temperature 15-30 ℃ 2 Permeation tubes with H in Cat. No. *3 The item(s) may vary by country or region.