Filters

The products shown on these pages are representative sources used for common applications.If you cannot find the product with your specifications, please contact us using the corresponding email contact on this website.In most cases we will be able provide you with a solution meeting your requirements.You can also use our product request forms.

Simulated filtersApplications

These standards are designed for the calibration of instruments, used for the measurement of adsorbed activity in charcoal and aerosol filters.

Construction

An activated plastic layer 0.2mm thick, is located between two paper labels 0.15mm thick and heat sealed between plastic foils 0.125mm thick (drawing: VZ-1158-001). Please enquire for larger diameters.

Ordering Information¹⁾

Energyrange	Radionuclide(s)	Total activity[kBq]	Activediameter[mm]	Overalldiameter[mm]	Productcode
80-1836 keV	Mixture NG1	44	40	50	QCRB1027
80-1836 keV	Mixture NG1	44	50	60	QCRB2491
80-1836keV	Mixture NG1	44	70	80	QCRB2654

Construction

An activated plastic layer 0.3mm thick, 50mm in diameter is mounted onto a backing plate and covered with a 0.3mm thick aluminium foil. The backing plate is glued into a ring holder 60mm in diameter, 3mm thick (drawing: VZ-538-001).

Ordering Information¹⁾

Energy range	Radionuclide(s)	Total activity[kBq]	Product code
80-1836keV	Mixture NG1	44	QCRB1074
60-1836keV	Mixture NG3	40	QCRB1072

¹⁾ Simulated filter sources are also available with other active or overall dimensionsand other radionuclide mixtures.

Back to overview – geometry sources

Simulated charcoal filter cartridgesConstruction

Homogeneous activated charcoal is fixed in a plastic cartridge 60mm in diameter and 20.5mm thick sealed with 2 plastic foils which are glued on the top and bottom of the (drawing: VZ-2139-001).The foils are secured with screws.

Application

These standards are for calibrating instruments used to measure charcoal cartridges cartridge from ventilation monitoring systems.

Ordering information – homogeneous activated type

Energy range	Radionuclide(s)	Total activity[kBq]	Density[g/cm³]	Product code
80-1836 keV	Mixture NG1	44	0,5 – 0,6	QCRB5966
60-1836 keV	Mixture NG3	40	0,5 – 0,6	QCRB5967

Construction

An activated plastic layer is heat sealed between plastic foils 0.25mm thick and mounted onto the top of the source. The empty volume of the cartridge is filled with inactive charcoal (drawing: VZ-1311-001).

Ordering information – face loaded type

Energy range	Radionuclide(s)	Total activity[kBq]	Density[g/cm³]	Product code
80-1836 keV	Mixture NG1	44	0,5 – 0,6	QCRB5968
60-1836 keV	Mixture NG3	40	0,5 – 0,6	QCRB1127

Back to overview – Geometry Sources

Simulated Charcoal or Zeolite Gamma Cartridge Standards—EG-CH:

The activity is uniformly distributed between two polyimide films and placed under the screen of a 1” x 2.25” (25.4 mm x 57.2 mm) separable plastic charcoal cartridge (surface loaded). This configuration simulates a face loaded charcoal cartridge.

Face Loaded: The activity is uniformly distributed between two polyimide films and placed under the screen of a 1” x 2.25” (25.4 mm x 57.2 mm) plastic charcoal cartridge (surface loaded).

Uniform Distribution: The activity is uniformly distributed within the charcoal or zeolite filling of the cartridge.

An aluminum metal cartridge is also available upon request. The standard activity for all configurations is 3.7 kBq (0.1 µCi). Sources are NIST traceable for contained activity.

csm catalogue reference and calibration sources Seite 22 Bild 0004 image