( ( ( ( ( ( This ( survey meter ) ) ( is ( calibrated ( only ( for ( gamma radiation ) ) ) ) ) ) , ) so ) ( you ( ( can not ) ( ( get ( ( an ( accurate reading ) ) ( of ( the ( exposure rate ) ) ) ) ) ( from ( ( ( beta particles ) , ) ( ( only ( an indication ) ) ( of ( their presence ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT This) (NN survey) (NN meter)) (VP (VBZ is) (ADJP (VBN calibrated) (PP (RB only) (IN for) (NP (NN gamma) (NN radiation)))))) (, ,) (IN so) (S (NP (PRP you)) (VP (MD can) (RB not) (VP (VB get) (NP (NP (DT an) (ADJP (JJ accurate)) (NN reading)) (PP (IN of) (NP (DT the) (NN exposure) (NN rate)))) (PP (IN from) (NP (NP (JJ beta) (NNS particles)) (, ,) (NP (NP (RB only) (DT an) (NN indication)) (PP (IN of) (NP (PRP$ their) (NN presence))))))))) (. .)))
This survey meter is calibrated only for gamma radiation, so you can not get an accurate reading of the exposure rate from beta particles, only an indication of their presence.
(ROOT (S (NP (JJ Meter) (JJ much) (NN distance)) (VP (MD can) (VP (VB beta) (NP (JJ particles) (NN travel)) (PP (IN through) (NP (NN air))))) (. .)))