The successor to the proven and popular Radalert 50, the Radalert 100 (or its identical sister instrument, the Digilert 100) is a digital pocket Geiger counter designed for general purpose monitoring of radioactivity.
It detects Alpha, Beta, Gamma and X-radiation, visually shown on a highly accurate digital display with readings in your choice of both CPM (to 110,000 counts per minute) and mR/hr (up to 110 mR/hr), or switchable to the international standard of µSv/hr (up to 1,100 uSv/hr).
A red LED blinks and a beeper chirps with each radiation count. The audio chirp can be turned off.
The Radalert derives its name from an audible alert that sounds when the radiation reaches a user-adjustable level.
The Radalert 100 also can be set for a Total Count (see closeup of panel), which will accumulate the radiation counts over time. This is a useful feature especially for establishing your background radiation level. As an example, you can set the unit to Total, and after say 10 minutes, divide the Total Count value by 10 to arrive at your background radiation in CPM.
This unit also has a Data Output port to record counts on a computer or data logger, as shown in the picture at right. Select the navigation button above or click on this link for more on the on data output, and the optional Software accessories. Also note the Audio Output port for external sound.
The Radalert 100 runs on a single 9 volt alkaline battery (included) which will last up to three months on continuous use at background levels.
The Radalert also comes with a padded vinyl carrying case with belt loop, shown at left. The Radalert 100 is a very popular unit. If you want an all-around excellent Pocket Geiger Counter with a digital readout versus an analog meter, along with a user adjusted audible alert, and/or desire a data port, we recommend this unit.