CAPRAC ® -t Wipe Test / Well Counter

NaI Drilled Well Detector, 256 Channel Pulse-Height Analyzer, Detects Extremely Low Levels Of Activity

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Don’t worry about meeting the regulations in 10 CFR Part 35.315 (200 dpm requirements for unrestricted areas and iodine contamination). Capintec’s CAPRAC-t® Wipe-Test Counter handles all of them.

Measure for measure, no other well counter offers the speed, accuracy and complete range of built-in features provided by the compact CAPRAC-t®. It performs a wipe test in just 6 seconds (for 1 nCi) and detects extremely low levels of activity with the accuracy only a NaI drilled-well detector can provide.

The CAPRAC-t® can also serve as a single-well gamma counter in departments that do not need multi-sample changers. User-defined protocols, trigger levels, and counting times are a “snap”. A 256-channel pulse-height analyzer permits built-in gamma spectroscopy. Definable conversion factors for specific radionuclides allow the CAPRAC-t® to calculate results in cpm, dpm, nCi, cps, dps, or kBq. The CAPRAC-t also displays photon-energy histograms.

The CAPRAC-t® is engineered and built for years of consistent, reliable performance and is Curie or Becquerel selectable. The unit has automatic background subtraction and self-diagnosis programs for systems testing with optimized signal-to-noise ratio. It includes a lead outer shield (1.3 cm thick) with optional auxiliary shield available.


  • 8” SVGA touch screen color display

  • 256 channel MCA w/detailed spectrum for id analysis

  • NaI drilled-well crystal detector

  • Automatic Energy Calibration, Constancy Check, and Background Subtraction

  • Automated well QC including chi-square and MDA

  • Manual and Automatic ROI

  • Sets user definable protocols for wipes

  • Print outs of all data for permanent records with the optional printer

  • Direct readouts with spectrum display are in cpm, dpm, Curies and Bequerels

  • Meets all state and NRC wipe test requirements

  • USB and RS232 communication ports for PC and printer

  • Lab tests include Schilling, Plasma and RBC volume

  • Built-in database for test and wipe results as well as QC


  • Performance: Type: 1.5” Sodium Iodine (NaI) drilled-well crystal; 256 Channel MCA manual and automatic ROI; Trigger Levels: User definable; Automated Calibration and Background Subtraction; QC Tests: Reproducibility, Chi-Square, MDA; Counting Rate: 10,000 cps

  • Display Screen: Type: 8” VGA-LCD color touch screen; Bq/Ci Reading: User selectable;

  • Activity Display: Selected radionuclide, efficiency, measured activity, and display units; Count Rate Values for both wipe and lab results

  • Printer: RS-232 or USB Ports for non-host based printers

  • PC Port: Interface: RS-232 and USB

  • Power Requirement: 100-240 VAC (50/60 Hz) 25W

  • Test: Diagnostic: Full test of program and system memories

  • Cable: Printer (Optional): 6’ (1.8m); Power: 6’ (1.8m)

  • Console Dimensions: 9.5” h x 9” w x 10.5” l (42 x 23 x 22 cm)

  • Console Weight: 7.5 lbs. (.4kg)

  • Well Counter Dimensions: 9.28” h x 6” d (23.8 x 15.2 cm)

  • Well Counter Weight: 15.2 lbs. (6.9 kg)

  • Crystal Dimensions: 1.5” x 1.75” (3.8 x 4.4 cm)

  • Shielding: .5” (1.3 cm) lead

  • Well Diameter: .67” (1.7 cm)

  • Well Depth: 1.5” (3.8 cm)

  • Cable Length: 9’ (2.7 m)

Item Number

5430-3136 CAPRAC®-t Wipe Test/Well Counter