Technical Associates VAP-X-Radon Monitor is a sensitive, rugged, portable instrument for detection and measurement of Radon vapor in the soil. Its subtractive balanced chamber electrometer circuit decreases background effects to negligible levels and its deionized and filtered intake reduces to negligible levels spurious effects from dust and existing ionization in soil air. It is battery or AC operated.

Inlet and outlet hoses are provided. The VAP-X-Radon will measure airborne Radon in any form: water vapor, hydrogen gas or as volatile chemicals in concentrations as low as 1 x 10-5 uCi/cc of air. (370 KBq/m3)