Check Sources

Ludlum offers a variety of check sources for use in verifying the operability of its instruments and detector systems.  If you don't see what is needed here, please contact Ludlum.

PLASTIC DISK CHECK SOURCES

Cs-137source

These are general purpose check sources that can be used freely to check responses from multiple instruments or be contained inside of Ludlum's mechanical check source holder (see below) that is directly attached to an instrument for convenience.  The sources are sealed within a plastic disk. 

 

 

 

 

 

 

 

 

 

 

Source

Size (diameter x thickness)

Part Number

0.25 µCi 137Cs 2.5 cm x 4.8 mm (1.0 x 0.19 in.) 01-5723
1.0 µCi 137Cs 2.5 cm x 4.8 mm (1.0 x 0.19 in.) 01-5196
5.0 µCi 137Cs 2.5 cm x 4.8 mm (1.0 x 0.19 in.) 01-5186
10 µCi 137Cs 2.5 cm x 4.8 mm (1.0 x 0.19 in.) 01-5231
1.0 µCi 133Ba 2.5 cm x 4.8 mm (1.0 x 0.19 in.) 01-5818














PLASTIC LAMINATE CHECK SOURCES with STICK-ON HOLDER

CheckSourceLabelCatPic

These sources are purposely designed to be attached to instruments.  They include a new very thin type plastic laminate source and an industrial strength adhesive holder for attaching directly to the instrument of choice.  The table below presents two of the more common sources. Other source activities and isotopes are available upon request.

 

 

 

 

 

 

 

 

Source

Size (diameter x thickness)

Part Number

0.25 µCi 137Cs 2.5 cm x 0.25 mm (1.0 x 0.010 in.) 4464-473-02
1.0 µCi 137Cs 2.5 cm x 0.25 mm (1.0 x 0.010 in.) 4464-473-01








MECHANICAL CHECK SOURCE HOLDER

Check Source Holder

Ludlum's traditional mechanical type check source holder is attached to the instrument housing with four screws. A nice swing-away door exposes the source whenever needed to verify detector accuracy.  This type holder is typically used with the Plastic Disk type check sources measuring 2.5 cm diamter x 0.32 mm thick (1.0 x 0.125 in.).  The part number is 4062-166.