LUDLUM 26-1 Integrated Frisker (CPM/CPS)

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/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, (k)dpm, (k)Bq, mR/hr, µSv/h

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 500 mR/h

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' (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 RATE (count rate), MAX (captures peak rate), and COUNT (preset count time from 0 to 20 min.)

UNITS: Changes units between count rate (cpm, cps), dose/exposure (µSv/h, mR/hr), or activity (dpm, Bq)

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: 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)

Temperature Range: -20 to 50 °C (-4 to 122 °F)

May be certified for operation from -40 to 65 °C (-40 to 150 °F)

Environmental Rating: NEMA 3, IP 53

Power: Two “AA” batteries

Distance from Surface Plane to Screen: 0.32 cm (0.125 inch)

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