US 12,282,007 B2
Alpha radiation detector having an optical sensor for measuring the radon concentration in the ambient air
Rudolf Waltl, Wittislingen (DE)
Assigned to LIVAIR GMBH, Munich (DE)
Appl. No. 17/778,680
Filed by RadonTec GmbH, Wittislingen (DE)
PCT Filed Nov. 20, 2020, PCT No. PCT/EP2020/082984
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2021/099619, PCT Pub. Date May 27, 2021.
Claims priority of application No. 19210601 (EP), filed on Nov. 21, 2019.
Prior Publication US 2022/0412934 A1, Dec. 29, 2022
Int. Cl. G01N 33/00 (2006.01)
CPC G01N 33/0055 (2013.01) 15 Claims
OG exemplary drawing
 
1. An alpha radiation detector for measuring radon concentration in ambient air, the alpha radiation detector comprising:
a housing having a base on which there is arranged a hood having a chamber which is located therein, the housing being configured in such a way that ambient air can penetrate into the chamber from outside, and
an optical sensor;
the hood having a first portion having an inner wall, which is provided with a scintillation material which generates light pulses upon impingement of alpha particles, which light pulses are sensed by the optical sensor, wherein the hood has a second portion formed as a ring which is made of a material that is impermeable to light but permeable to gas, so that radon gas can penetrate into the chamber from outside through a wall of the ring in a direction that is transverse to a circumferential direction of the ring, wherein the first portion and the second portion are arranged on top of each other.