EN-12 Precision Geiger Counter with Geiger Tube & Accessories
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This versatile instrument provides all the features ever needed in a Geiger counter. Count rate in counts per minute or tube voltage are shown on the six-digit front panel display. Several modes of operation are easily selected via a front panel push-button. An RS-232 serial port for computer interfacing is built in.
In these modes, the instrument will count up to a preset number of counts, then divide the counts by the time period, and display the result. Measuring count rate in this manner gives a result with a fixed statistical accuracy. With preset counts of 100, 1000, and 4000, the accuracy of the result will be 10%, 5%, and 1%, respectively. Measurement times are virtually unlimited, so it is possible to measure background or natural low level radioactive sources with high precision.
In these modes the instrument will count pulses for a fixed time interval (15 or 60 seconds) . This is the fastest method of obtaining count rate. This is the usual method of measuring the count rate, though for low level sources it is not as accurate as the fixed count modes.
The voltage supplied to the Geiger Tube is fully adjustable. In the "VOLTS" mode the tube voltage is adjustable and displayed on the digital readout.
The Precision Geiger Counter outputs a computer-compatible signal which permits data logging with a computer. Included with the instrument are the cable and software for two methods of computer access. In the first method, the instrument is connected to a serial port and sends each measured count rate that is captured by the computer. In the second method, the Geiger Counter performs as the Daedalon En-18/19 Interface. This allows you to run the software and experiments for the Computer Geiger Interface on an IBM PC or Macintosh computer.