In cases of large parties and large social gatherings that involve a security risk or otherwise require a method of performing a head count as a precaution in the event of any travesties that may occur. These travesties may involve investigations by the law enforcement agencies. The head counts can come in handy in such cases. Most stores have such a device to cross check with the bills and to help in prevention of shoplifting. Some devices operated by NBN battery cost counter involve their use to continue even in the event of a blackout. These counters can later be hooked up to a computer using an USB cable and checked for the number of people at a specific time.
An accurate people counter device are a great help to all law enforcement agencies and most of them, if not all and how to replace a battery, have such devices installed in their headquarters to effectively monitor the number of people in the building. Offices and similar places have such devices as well in order to perform a daily head count of the employees and visitors. They help in determining the census in an average. Festivals and night clubs have these devices as well in order to monitor their inflow. The devices use an infrared motion sensor to determine the number of people in the place. There are devices that support three hundred and sixty degree motion sensor to effectively filter and perform head counts in large places.
Some counters can also transmit the number to a receiver hub which is hooked up to a computer. This is a common case in casinos that deal with large amounts of financial transactions daily and there is a major security risk involved. These transmitters follow up on a short range radio wave to transmit and the channel is a secure one encrypted by a 128 key encryption. This helps in avoiding transmission bleeding into other frequencies and is secured using a hard server line. These devices that are used in casinos help maintain the income of the casino in respect to the number of people in it. Most casinos are targets for thieves owing to the large amounts of naked currency that are milling around inside. The security section of the casino operatives need to be efficient and effectively capable of handling all such situations.
The sister device of these people counters are traffic counters. These devices are installed alongside all traffic cameras in order to effectively monitor the passage of traffic past a single point. The difference in numbers often helps solve a lot of cases. The outside is a large place and is effectively more difficult to monitor by a simple infrared sensor. There are counters involving a single line laser and receiver devices to effectively monitor the amount of traffic. These counters are also used to determine races where the car to cross the laser line first is determined using the same technology. These devices are used worldwide in all major cities.