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A new type of P-ray survey meter has been developed which can be used for measuring absorbed dose rate from p-rays almost independently of their maximum energy. This survey meter can be also used for monitoring surface contamination. The meter's detector is a plastic scintillator.When the survey meter is used for measuring absorbed dose rate, its response is constant to within +.lo% for P-rays with maximum energy greater than 0.4MeV. The measurable ranges of absorbed dose rate are 5 x to 1 x lo3 mradlhr for skin (epidermal thickness: 7 mg/cm2) and 3 x to 1 x lo3 mradlhr for fingers (epidermal thickness: 40 mglcm').In monitoring surface contamination, the measurable range is 3 x lo-' to 1.7 x lo3 P-particles/cm' . sec [21r solid angle,' natural uranium source covered by an aluminium filter (27 mg/cm2) for shielding low-energy P-rays of 234Th and a-rays].

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