We use the Sun Nuclear Corp. Model 1027 Continuous Radon Monitor. EPA-approved since 1986, it is intended for applications where accurate measurements are desired. The test is run for at least 72 and up to 90 hours, under closed-house conditions. The monitor is then brought back to the office, where the results are printed out on a ticker-tape, showing hourly readings both numerically and in a bar graph.

The Sun Nuclear Professional Radon Monitor is a continuous radon monitor (CRM) that samples radon gas concentrations using a passive radon chamber design. A special filter in the chamber wall allows for the free movement of radon gas but prevents the entry of radon decay products. Based on principles of gas diffusion, the concentration of gas in the chamber is equivalent to the concentration of radon in the air.

As the radon gas decays inside the chamber, alpha radiation is released. When the alpha radiation comes in contact with a silicon chip inside the chamber, an electric pulse is generated. The concentration in picocuries per liter (pCl/l) is computed by a microprocessor, on the basis of the number of pulses that occur over time. An internal memory stores long-term data for later print-out. The Sun Nuclear Professional Radon Monitor is intended for applications where accurate measurements of a duration of 48 hours or more are desired.

Our monitors are calibrated annually to ensure the greatest possible accuracy.

We also perform radon-in-water tests using the Accustar Labs liquid scintillation test kits.

The charge for either type of test is $180 per test.