CRC 25W Dose Calibrator/Well Counter


As a combination of the popular CRC®-25R Dose Calibrator and the CAPRAC®-R Well Counter, the CRC®-25W dose calibrator provides advanced features with the speed and accuracy you need to measure activity and prepare doses. Its ion chamber is one of Capintec's time-tested, high pressure well designs capable of measuring a dose as high as 6 Ci (250 GBq) of Tc 99m with high accuracy. The CRC®-25W also features chamber plug-and-play capability.


For wipe testing, the CRC®-25W allows the user to define specific counting procedures (protocols) with trigger levels for work, patient, unrestricted areas and sealed source leak tests. The CRC®-25W also performs counting functions for wipe
tests in as little as 6 seconds at activities as low as 1 nCi. Low activities are measured with a drilled well high sensitivity Sodium Iodide (NaI) detector. The 6-channel pulse-height analyzer also provides the user with pulse amplitude discrimination, which can be used to help with radionuclide isotope identification. The chamber and counter of the CRC®-25W are combined in a menu driven, push-button interface that is easy to learn and use. Hardwired microchip control eliminates analog switches and dials, while improving measurement response time.


  • USB and RS232 ports
  • Software upgrade via SD flash card
  • USB printer capability
  • Chamber plug-and-play capability
  • Chamber can be placed 100 feet from the readout unit
  • Built-in dose calibration, quality control and self diagnostics
  • Well counter for wipe tests and laboratory tests
  • User-definable protocols for wipe testing
  • Large character, high visibility display with automatic backlighting
  • Over 80 nuclides in memory
  • Automatic energy calibration, zeroing and background subtraction
  • Hard copy records of data available from optional dot matrix printer
  • Vial and syringe labels on adhesive-backed strips available from
    optional mini-printer
  • 6-channel pulse height analyzer with spectral pulse amplitude discrimination
    for preliminary isotope identification
  • Compatible with nuclear medicine information management systems
    via USB or Rs-232 ports
  • Calculation of printable dose table
  • Inventory control maintains inventory of unit dose and kits
  • Automated linearity and geometry testing
  • Radiochromatography QC package


Well Detector
• Type: Sodium Iodide (NaI) drilled-well crystal detector
• Energy Discrimination: Fixed range MCA, channel windows are
15-100, 100-200, 200-400, 400-660, 660-800 and >800 keV
• Warning Trigger Levels: User-definable
• Tests: Daily test by standard sources (Cs-137 or Ba-133), data
and program memory configuration

Ionization Chamber
• Type: Thin wall, deep well, high pressure
• Measurement: Auto ranging
• Activity Range: Up to 6 Ci (250 GBq)
• Resolution: .001 mBq (.01 μCi)
• Response Time: Within 2 sec., for low activity sample, 4 to 16
sec. (user selectable)
• Tests: Daily tests include Auto Zero, Background Adjustment,
Voltage Test, Data Check, Accuracy and Constancy

Display Screen
• Type: Dot matrix liquid crystal display
• Bq/Ci Reading: User selectable or fixed
• Calibrator Values: Selected radionuclide,calibration number,
measured activity and display units (Bq/Ci)
• Counter Values: Wipe and lab test results

• Accuracy: Better than ± 2%
• Linearity: Within ± 2%
CRC-25W Dose Calibrator ®

Nuclide Data
• Nuclide Setting Keys: 8 pre-set, 5 user selectable
• Calibration # Key: Calibration # Keys for Over 200 nuclides
• System Memory: Over 80 nuclides (w/cal number and half-life)

Standard Source Data
• System Memory: Co-57, Co-60, Ba-133, Cs-137, Ra-226 standard sources
Molybdenum-99 Assay
• Methods: CAPMAC® & canisters
• Measured Values: Mo-99 elution, Tc-99m,Tc-99m/Mo-99 ratio

PC Port
• Interface: RS-232C and USB port
• Compatibility: Standard nuclear medicine management systems

Printer Port
• RS-232 & USB

Power Requirements
• 100-240 VAC (50/60 Hz) 100 MA

• Diagnostics: Full test of program, system memories

• Printer (Optional): 1.8m (6ft)


Console Dimensions

  • Height: 13.7cm (5.38in)
  • Width: 26.0cm (10.25in)
  • Depth: 26.7cm (10.5in)
  • Weight: 1.8kg (3.9lb)
Chamber Dimensions
  • Height: 43.8cm (17.25in)
  • Diameter: 17.2cm (6.76in)
  • Weight: 13.6kg (30lb)
  • Well Diameter: 6.1cm (2.4in)
  • Well Depth: 25.4cm (10.0in)
  • Cable Length1: 3.7m (12ft)
Well Dimensions
  • Height: 23.8cm (9.38in.)
  • Diameter: 15.2cm (6in.)
  • Weight: 6.9kg (15.2lb.)
  • Well Diameter: 1.7cm (.67in.)
  • Well Depth: 3.8cm (1.5in.)
  • Cable Length: 2.7m (9ft.)

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