LUDLUM 26-2 Integrated Frisker With Timed Frisk (0.1 cps ~ 1.99 kcps; 1 cpm ~ 99.9 kcpm)

Detector: Pancake GM detector, stainless steel screen

Window Area:

Active: 15.51 cm2

Open: 12.26 cm2

Efficiency (4π): 

Alpha

239Pu: 11%

Beta

99Tc: 14%

32P: 32%

14C: 2%

90Sr/90Y: 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

Range: 

0.1 cps to 1.99 kcps

1 cpm to 99.9 kcpm

Linearity: ± 10%

Backlight: Built-in ambient light sensor automatically activates low-power LED backlight. May be configured for 'Continuous On' operation (will reduce battery life).

LEDs: 

Daylight-visible green LED for "OK"

3 red LEDs for 3 levels of alarm

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), and TIMED FRISK (user-selectable preset count time from 0 to 20 min.)

Response Time: User-selectable from 1 to 60 seconds or Auto-response rate FAST or SLOW

Resolving Time: Approximately 110 µs as defined by IEC 60325

Alarms: Up to three count rate alarm setpoints, adjustable over the display range

Overload Protection: High count rate saturation protection 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)

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)

Datasheet

Manual