List of people with the given name Valerie. 1  Valerie Bertinelli, American actress. 2  Valerie Jarrett, American businesswoman and lawyer. 3  Valerie Leon, British actress. 4  Valerie Lilley, Northern Irish actress. 5  Valerie Morales, Puerto Rican singer-songwriter. 6  Valerie Plame, former CIA officer. 7  Valerie Sayers, American author.
Hardware costs and manpower costs. Portal metal detectors vary widely in price. Portals on the market range from as little as $1,000 up to as much as $30,000. The moderately-priced models around $4,000 to $5,000 probably offer the features and reliabilities required for a school metal detection program. Models closer to $1,000 are not recommended due to lack of sensitivity of these devices.
You can get a smoke detector for as little as $7. And while they cost very little, smoke dÂ­etectors save thousands of lives each year. In fact,it is recommended that every home have one smoke detector per floor.All smoke detectors consist of two basic parts: a sensor to sense the smoke and a very loud electronic horn to wake people up. Smoke detectors can run off of a 9-volt battery or 120-volt house current.In this article, we will examine the two most common types of smoke detectors used today: photoelectric detectors and ionization detectors. And, we'll also take a look inside an ionization detector. Let's start with photoelectric detectors.moke detectors can run off of a 9-volt battery or 120-volt house current. In this article, we will examine the two most common types of smoke detectors used today: photoelectric detectors and ionization detectors. And, we'll also take a look inside an ionization detector.