420 ILCS 44/27: Approval of radon sampling and measurement devices for radon contractors.

No person shall sell a device in this State to a radon contractor for use in licensed activities to detect the presence of radon or radon progeny in the indoor atmosphere without prior approval of the device from the Agency. All electronic radon detection devices sold to radon contractors for use in a licensed activity in this State must be calibrated to ensure the accuracy and precision of their measurements of radon and radon progeny.