Details

• Gamma meter with internal proportional counter tube

• Versatile survey meter available with a large number

of external detectors

• Energy range 30 keV - 4.4 MeV [ H*(10)]

• Comfortable to use

• Serial infrared interface

• Type tested by PTB (Germany) in Hx or H*(10)

• Type tested for use by fire brigades

• NRPB approved (UK)

With the exception of the display instrument FH 40 G-X, all FH 40 G versions incorporate an energy-filtered proportional detector - no external probe or cable are required for gamma dose rate measurements. The internal proportional detector is always operational while an external detector is

connected. The external probes utilized with either model of FH 40 G are "smart" with the calibration parameters loaded automatically with a change of probes.

All FH 40 G versions and external probes containing the “-10” suffix are designed to meet the energy response behavior of the new SI-units ambient dose equivalent and ambient dose equivalent rate according to ICRU 39.

Measured values are shown on a clear, backlit LCD display.

Measurements are digital with a vertical 3 decade logarithmic

bargraph.

An intelligent rate meter algorithm (ADF mode) detects and indicates small changes in dose rate, suppressing random noise. Additional information includes alarm settings(s), audio speaker, battery voltage, external probe parameters, date and time and many user-selectable functions.

The FH 40 G is rugged, lightweight, fits snugly in the palm of the hand and is easy to operate with large keys that enable users wearing gloves. Internal diagnostics ensure proper functioning of the

detector(s) and the electronics. If the battery voltage falls below a pre-defined value, an icon on the display flashes giving the user 20 hours of remaining use before replacing the batteries.

Alarm values are established for dose rate and integrated dose. When an alarm value is exceeded, an audible alarm is emitted. In parallel to the measured value display, an audible speaker can be activated to signal detector pulses.

The FH 40 G models are designed to record up to 256 data points containing measurement number, date, time and dose rate at the internal detector and external detector, status, and barcode information.

The stored values can be read directly from the LCD, accessed at any time and can also be processed and transferred for archiving to a PC via the FH 40 G serial interface.

All settings can be accessed and the data analysis can be done, using an optional Windows™ -based PC-software.

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