Ludlum Model AT-138

   Pencil Radiation Dosimeter

●  Pocket-Sized Direct Reading Pencil Radiation Dosimeter

●  Sensitive to Gamma and X-ray Radiation

●  Used for Personnel and Environmental Monitoring

●  Meets ANSI N13.5 and N322

●  Lightweight, Hermetically Sealed

●  Sturdy Pocket Clip

●  Responds Well to Fast Pulse X-rays

●  Low Leakage, Measures Background

●  0 to 200 mR Dose Range

The Model AT-138 direct reading pencil radiation dosimeter is a rugged instrument which measures accumulated quantities of gamma and x-ray radiation up to 200 mR. Applications include personal and environmental monitoring. The low energy feature has hospital applications including fluoroscopy, portable radiography, and angiography. This pocket size instrument is light weight, and has a sturdy clip to attach to an individual's pocket.

PART NUMBER: 51-2936

APPLICATION: personal and environmental radiation monitoring

DETECTION RANGE: 0-200 mR

ENERGY RESPONSE: 16 keV to 2 MeV
RADIATION DETECTED: gamma and x-ray from 16 keV to 2 MeV
ENERGY RESPONSE: see response curve below
RADIATION DETECTOR: fiber electrometer mounted in an electrically conducting plastic ion chamber
DETECTOR HOUSING: very low permeability plastics, hermetically sealed
ACCURACY: within 10% of true exposure
RATE RESPONSE: dose rate independent for gamma and x-ray radiation
ELECTRICAL LEAKAGE: less than 1.0% of full scale for 24 hours at 122°F (50°C)
TEMPERATURE RANGE: -4 to 122°F (-20°C to 50°C)
RELATIVE HUMIDITY: up to 90%
DIMENSIONS: 0.6 x 4.5 in. (1.5 x 12.4 cm) (Dia x L)
WEIGHT: 1.0 oz (25 g)
FINISH: barrel and end caps: natural matte black; Clips: color coded plastic or metal clips