Model N30013
Waterproof PTW Farmer® Ionization Chamber
The Model N30013 (formerly N30006) is an ionization chamber of the classic Farmer design, intended for absolute dosimetry, but featuring waterproof construction. Similarities to the PTW N30010 include a sensitive volume of 0.6cm3, guarding up to the measuring volume, atmospheric communication and a thimble with internal 0.09mm thick graphite layer protected by a 0.335mm acrylic exterior wall. This thimble material combination makes the N30013 essentially air-equivalent with all the ruggedness of an acrylic thimble.
As with all PTW Farmer® ionization chambers, the N30013 conforms to external physical dimensions and meets or exceeds performance standards of the original
Farmer design. It features a low-noise triaxial cable with radiation resistant insulation. Each chamber is supplied with an integral 1 meter cable, male triax BNC connector with dust cap and chain, an acrylic 60Co build-up cap, a foam-lined case and QA checkout at CNMC.