Home Inspection Tip - Plan For Radon Testing

Because radon gas seeping from the ground into a home is a health hazard, you should have the home tested for radon levels. This is true whether you're buying, selling or building a home. Your home inspector can do the test or help you find a professional who is qualified to do it.

Radon testing is something that must be planned for. It's necessary to decide where in the home the testing should be done and how long the test will take. No reputable tester can come into a home and test in 30 seconds or even 5-10 minutes. It takes a minimum of 48 hours to test accurately for radon. Some devices require a longer period of time.

Humidity Chamber

Your home inspector or other qualified radon testing professional should know the best place to put radon test equipment. It should go into the lowest level of the home that's occupied regularly, such as any place used as a bedroom, play or exercise area, den or workshop. The EPA says testing should not be done in a closet, stairway, hallway, crawl space or in an enclosed area where there's either high humidity or breezy air circulation. Avoid places like the kitchen, laundry room,bathroom or furnace room.

How long should a radon test take? Here are some considerations. Radon levels vary from day to day and season to season. That means a short-term test is less likely than a long-term test to tell you your year-round average radon level. However, if you need results quickly, a short-term test can be used to decide whether to repair the home.

Short term testing is the fastest, but the test equipment must remain in place for two to ninety days, depending on the device used. Two groups of devices are most commonly used for short-term testing-passive or active. The passive device group includes alpha track detectors, charcoal canisters, charcoal liquid scintillation detectors, and electret ion chambers. The active device group consists of different kinds of continuous monitors.

There are a couple of considerations to keep in mind when short term testing is used. Test accuracy is improved if two tests are taken at the same time. If you have two short term tests done, one right after the other, you'll get a better idea of the seasonal average for radon level readings. Both active and passive devices may have features to help to prevent test interference.

For long-term tests, the test equipment remains in the home for more than 90 days. Alpha track, and electret ion chamber detectors are most commonly used for long term testing. The advantage of a long-term test is that it will give you a reading that is more likely to tell you your home's year-round average radon level than a short-term test. If you're able to allow for 90 days or more to test, long-term tests can be used to confirm initial short-term results. According to the EPA, when long-term test results are 4 pCi/L or higher,the appropriate steps should be taken to repair the home to reduce radon levels.

The office in your state that deals with radon issues can help you and your qualified radon tester to decide on the best testing options.

Home Inspection Tip - Plan For Radon Testing

Temperature and moisture in pharmaceutical testing

Pharmaceutical products are covered by some of the strictest regulations of any product out there. Product testing to changing environmental conditions must be recorded with two temperature sensors and humidity accurate and reliable data-logging software.

These tests control process is called the stability test, since test materials are analyzed for any significant deterioration or physical changes during the different temperature and relative humiditySettings.

Humidity Control

The stability of a pharmaceutical product is a measure of deterioration during the period in which its properties are provided and features to be able to withstand certain limits. All items for the diagnosis, mitigation, treatment, prevention of disease undergo a form of tests, often several times in product development, development of drugs for the selection of packages.

Temperature and humidity are just aPart of a test system stability. On older systems use bulky tubes large, all samples included. The disadvantages of air chambers that can be tested samples of temperature and relative humidity setting in equipment that requires a lot of space and high management costs. Table unit stability test, or "smallest unit of stability test" allow for many different sensor data at the same time be registereda relatively small amount of physical space.

Calibration for temperature and humidity sensors

In general, the temperature sensors require less calibration, because they tend to maintain a higher degree of accuracy. The humidity sensor has an accuracy of calibration can move frequently at higher temperatures. This is not a significant problem if the product should be tested for relatively low temperature ranges, but the control requiresCycling on a wide range of temperatures, then a robust temperature-humidity sensors with frequent calibrations are recommended.

When purchasing new and used units, it is also appropriate to ensure that the calibration with the purchase (do not forget to ask if the certificates are traceable to the regions and which are valid) are provided. A calibration certificate is a minimum requirement to comply with international standards.

Several international validationRequirements also govern the manner of use of electronic signatures, electronic data stored, and other requirements of the computer system is to test the stability. Not only should the sensors must be compatible, but also stores all its data. Who could be interested in further reading to do well, the FDA GMP requirements Eudralex 21 Volume 4 of reference.

Temperature and moisture in pharmaceutical testing