Model 78-6

The Ludlum Model 78-6 Analog Stretch Scope features a 2.5 x 2.5 cm (1 x 1 in.) NaI(Tl) scintillator mounted on a 3.7 m (12 ft) extendable pole to offer an optimum optimum performance in counting low-level gamma radiation. The NaI scintillator is energy sensitive, refer to the energy response curve for the relative response. The detector measures gamma radiation from 1 µR/hr to 5000 µR/hr (0.01 µSv/h to 50 µSv/h).

Five range divisions are provided in the 0 to 5000 µR/hr (0 to 50 μSv/h) spectrum. The meter face is made up of two scales, 0 - 50 and 0 - 25, plus battery test. The 0 - 50 scale corresponds to the 50, 500 and 5000 positions on the range selector switch. The 0 - 25 scale corresponds to the 25 and 250 positions on the range selector switch.

Other instrument features include Dead Time Correction (DTC) to compensate for detector dead time; audible click-per-event with programmable 1, 10, 100, and 1000 divide-by; LCD backlight with programmable "on" time; programmable fixed or variable response time, and a count overflow visual alarm.

Features

• Range: 1 to 5000 μR/hr (0.01 μSv/h to 50 μSv/h)
• 1.2 m (4 ft) to 3.7 m (12 ft) Telescoping Stainless Pole
• Dual Analog/Digital Display
• Splashproof Buttons
• 2.5 x 2.5 cm (1 in. x 1 in.) NaI Scintillator Detector