SE International Radiation Detector
Abacus - Wireless Handheld Radiation Alert® Detector
( Temporarily Discontinued )
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Abacus Picture
Ask about our Abacus & iPaq Combo
The Abacus is a handheld, digital radiation detection device that enables you to complete your surveys automatically with your Abacus and a Windows Mobile™, Palm™ Pilot, or Windows™ Computer. Not only does it offer excellent sensitivity to low levels of alpha, gamma, and x-rays, but the internal peanut detector automatically performs gamma subtraction from the pancake detector for unprecedented beta sensitivity. The software can display a variety of units for a wide array of applications, take timed counts, control the audio, and save your surveys for easy analysis and sharing, all wirelessly right to your computer! The Abacus also tracks dose, dose rate, and has a red count light, a beeper sound,
and selectable alarm thresholds for quick assessments. The tension-mounted detector head has a wide range of motion that can be easily adjusted for use in any working environment. Hardware alarms can be set for quick audio surveys without a computer or handheld device.


One Halogen-quenched, uncompensated GM pancake
tube with thin mica window, 1.4-2.0 mg/cm2
areal density. Effective diameter of window is 45 mm
(1.77 in.). One Halogen-quenched, uncompensated
thin wall beta-gamma GM peanut tube.
Windows Mobile™ PocketPCs, Palm™ Pilots, or
Windows™ based laptop or desktop computer.

Operating Range
Exposure Rate

µR/h - 0 to 2,000,000
mR/h - 0 to 2,000
µSv/h - 0 to 20,000
Count Rate:
cpm - 0 to 750,000
cps - 0 to 12,500
Sample Counting:
Total counts - 1-99,999,999,999
Accumulated Dose Limit
1.8E308 (Effectively Unlimited)
Gamma Sensitivity
Peanut: ~7.5cps/mR/hr ref. Co60
Pancake: 3500 CPM/mR/hr
ref. Cs137
Meter will hold at full scale in fields as high as 100 times the maximum reading.
Typically ±15% of reading
Alert Set Range
The software alert has a full range for both accumulated dose and Exposure Rate.
The probe's internal hardware alarm is for exposure rate only with a range of
.001 - 1999 mR/hr.
Audio Indicator
Internally mounted beeper (can be switched off, volume adjusted, and can be set for single tube audio).
Total Count timer from 1 -99,999,999,999 seconds.
Count Light
Red LED flashes with each radiation event.
Bluetooth Wireless w/ 30 ft. avg. range

Power Requirements
Two (2) AA Batteries
Temperature Range
-10ºC to 50ºC (14ºF to 122ºF).
291 grams (10.3 oz.)
333 x 67 x 41 mm (13.1 x 2.7 x 1.6in.).
Limited Warranty

90 day limited warranty on GM Detector, 1 year limited


Known Efficiencies
Th 230 .......%4.2
Sr 90 ........%22.784
Cl 36 ........%20.91
Pm 147 .......%6.68
Tc 99 ........%11.69
Cs 137 .......%20.78
I 125 ........%0.05

Abacus Energy Response




Abacus Flash Tutorial | Abacus Operation Manual (PDF) | English | Spanish | Software Updates | Quick Specs

S.E. International, Inc.
P.O. Box 39, 436 Farm Rd. Summertown, TN 38483
1.800.293.5759 | 931.964.3561 | Fax: 1.931.964.3564 |

RADIATION ALERT® Quality Handheld Radiation Detectors, Geiger Counter, & Radiation Spectrum Analyzers are engineered
to be reliable, simple to use, affordable and made in the USA.
For ordering and pricing, Call 1-800-293-5759.
Inspector, Monitor 4, and Abacus are trademarks owned by S.E. International, Inc.