LUDLUM 26-3 High Range Frisker (0.00~1000 mR/h)
Detector: Pancake GM detector, stainless steel screen (79% open)
Window Area: Active: 15.51 cm2 (2.4 in2)
Open: 12.26 cm2 (1.9 in2)
Efficiency:
Alpha
239Pu: 11%
Beta
99Tc: 14%
32P: 32%
14C: 2%
90Sr/Y: 22%
125I: 0.2%
Gamma
5.5 cps per μSv/hr (3300 cpm per mR/hr) (137Cs)
99mTc: ≤ 1%
Display: 3½ digit LCD with large 12.7 mm (0.5 in.) digits, low-battery indicator, MAX, ALARM
Units: (k)cps, (k)cpm, (k)dpm, (k)Bq, mR/hr, µSv/h, Bq, dpm
Range:
0.00 cps to 19.9 kcps
0 cpm to 999 kcpm
0.00 Bq to 19.9 kBq
0 dpm to 999 kdpm
0.00 to 1000 mR/hr
0.00 to 1999 µSv/h
Linearity: ± 10%
Backlight: Built-in ambient light sensor automatically activates low-power LED backlight, or may be configured for 'Continuous On' operations (will reduce battery life)
Controls:
ON / OFF / QUIET: Press to turn ON; Tap to alternate between click audio and QUIET; Hold for OFF
MODE: Alternates between NORMAL (count rate), MAX (captures peak rate), or COUNTER (user-selectable count time from 0 to 20 min.). Each mode is separately programmable so it can be active or turned off.
UNITS: Changes units from count rate (cpm, cps) to dose/exposure (µSv/h, mR/hr) to activity (dpm, Bq)
Response Time: User-selectable from 1 to 60 seconds, or automatic FAST or SLOW
Resolving Time: Approximately 110 µs as defined by IEC 60325
Alarms: Count rate and scaler alarm setpoints adjustable over the display range
Overload Protection: High rate saturation protection, indicated by flashing display and audio alarm, prevents false display of lower count rates
Loss of Count Protection: After 60 seconds of no pulses from detector, unit will flash a zero reading and the alarm audio will be triggered
Click Audio: Greater than 60 dB at 0.6 m (2 ft.)
HV Testpoint: Accessible by removing battery cover, allows HV measurement and pulse injection for calibration using optional cable (PN: 8303-1044)
Environmental Rating: NEMA 3 / IP 53
Power: Two “AA” batteries
Distance from Surface Plane to Screen: 0.32 cm (0.125 in.)
Size (H x W x L): 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.)
Weight: 0.45 kg (1.0 lb)
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