Packard Cobra 5003 Automated Gamma Counter

Packard Cobra 5003 Automated Gamma Counter

  • Available in four models
  • Fully automatic- cassette driven system
  • Fast throughput rates
  • Stat capability

Grab this free guide today and learn how you can achieve a more efficient technique for your counting applications. Get Your FREE Used Gamma Counter Purchasing Guide Here.

For more information or to place an offline order call 1-800-745-2710


We Accept Trade-ins!

Don’t forget to tell us about any unused

instruments taking up space in your lab.


The Packard Cobra II Gamma Counter is considered one of GMI's core instruments. This series is available in single, five or ten detector configurations. All Cobra Gamma Counter models can count 12x75 mm RIA tubes, 16x100mm and a variety of smaller micro-tubes using an available adapter. (Please contact our expert technical team if you require assistance.)

All Cobra systems include an LCD display for output, Dot Matrix Printer, tube racks, protocol ID tags and operation manuals. Specific calculations include calibration curve display-, linear-, polynomial regression-, log-, logit-, 4 PL-, auto spline-, manual spline- and cubic spline curve fitting algorithms.

The single detector model is available in 2 inch or 3 inch crystal configurations for research grade capabilities. The system can accommodate tubes from 12mm up to 16mm. GMI has the Packard Cobra series in the following models:

  • Packard Cobra Model 5002
  • Packard Cobra Model 5003
  • Packard Cobra Model 5005
  • Packard Cobra Model 5010

Our GMI certified guarantee ensures that all products meet manufacturer’s original specifications. GMI is the smart choice for all your new and used laboratory instrumentation needs.

Packard Cobra Model 5002

This versatile model is ideal for both research and routine laboratory applications. System specifications include single 2 inch sodium iodide (NaI) through-hole detector, a 2000 KeV energy range and 750 sample capacity. The system includes a new LCD Display, Epson printer and test tube cassettes. An optional instrument cart is also available. Packard Cobra 5002 systems are GMI certified which ensures that original manufacturer specifications including detector efficiency and crystal resolution are maintained.

Packard Cobra Model 5003

The Cobra II model 5003 is a true research-grade Gamma Counter. System specifications include a single 3-inch NaI through-hole crystal detector, a 2000 KeV energy range and 750 sample capacity. This system is ideal for counting low-level activity and higher energy isotopes.

Packard Cobra Model 5005

The Cobra II 5005 is a multi-detector system with five 1.5 inch NaI through-hole detectors with an energy range of up to 1000 KeV. Having the capability to count five samples at a time, the 5005 is a suitable model for laboratories with high throughput requirements.

Packard Cobra Model 5010

The Cobra II model 5010 is a 10-detector system which provides the highest throughput available. This model is capable of automatically counting up to 1000 RIA tubes. High capacity systems including the model 5010 are ideal for use in large reference laboratories or research labs that count large batches of short-lived isotopes like PET facilities.

Call us today to learn more about the Packard Cobra II Gamma Counter!

Cobra 5003
Test Tube Size
(Sample Specifications)
Up to 16 mm x 106 mm
Power 100-130/200-260 VAC
Frequency 50/60 Hz
(Temperature Regulation)
Automated gamma counter
Interface protocols
(Data Processing)
RS232C, optional second RS232C, Ethernet LAN adapter
Stat Capability (Plasma Sample) Yes
Yield/hr 120
Warm-Up Time
(Test Tube)
Continuous power
Dimensions of Display
(H x W x D)
71.1 cm x 68.6 cm x 81.3 cm
(28 in. x 27 in. x 32 in.)
WEIGHT, kg (lb) (DISPLAY) 226.8 kg (500 lbs)
Detector (Scattered Light)
Characteristics (Image Storage) Through-hole
Efficiency, %
(Gas Trap)
Detector Shield thickness 76 mm
Number of Staining Posts 1
Internal Calibration (Protocols) Continuous
Alternatives (Staining Stations) Yes
Display SVGA CRT, printer
Data Processing Integrated 586/133 PC RIA QC system
Reductions (Error) Optional
Algorithms (Detector) Linear, polynomial regression,
loglogit, 2-PL, auto spline,
manual spline, cubic spline
Calibration Curve Display (Detector) Yes
Calibration curve edit (Detector) Yes
User definable (Programs) 60
Energy Windows
Dual-label assay Yes
Preset I-125, Co-57, Co-60, Cr-51,
Se-75, I-131, Fe-59, Na-22
Adjustable (SASH) 15-2,000 keV
Other Attributes (Interference Compensation) RIA-QC data management system; coded assay for special assay protocols;
spectral analyzer, 2" or 3" detector; software for microsphere.
Meets requirements of CE 93 (IEC 61010-1, IEC 801-2, CISPR Pub. 22 class B),
CLIA, CSA, FCC, GLP, GS mark, and TUV. Pac
GMI Certified Service means:
  • Healthy operation of your instrument
  • Helping to ensure the quality of your results
  • Lowering cost of ownership through multilple service agreement options
  • Prolonging instrument serviceable life
  • Safe Operation of your equipment
  • Minimizing downtime increases productivity and minimizes revenue loss
  • Instrument Evaluation Services
  • Contract Refurbishing
  • Relocation Services
  • Equipment Finder Service
  • Training Courses
  • Depot Repair
  • Instrument Decommisioning & Disposal Services
Service Agreements

Preventative Maintenance Visit
('tune up', including cleaning, lubrication, and adjustments)
1 Service Visit
Service Visit 1PM
1 Service Visit
1 2
Parts and Labor    

Discounted Parts
Discounted Labor (As needed)

Lab Equipment Replacement Parts & Accessories

Click button to view parts which are available for this instruments and instruments like it in our brand new online parts shop.

We also carry instruments parts for the following other instruments categories.


Your trusted source for new, factory clearance & certified pre-owned lab instruments since 1995.

  • We routinely save discerning laboratories 30-80% with our recertified pre-owned and factory clearance instrument offerings.

  • Quality? ISO 9001:2008 certified means we remove 100% of the risk in buying ‘used’ laboratory equipment.

  • Warranties from 90 days to a year as well as multi-year service agreements are available.

GMI is an ISO 9001:2008 certified company - proof that your instruments pass through a rigorous re-certification process to ensure that it arrives at your laboratory defect-free and in full working order.
We are neither an auction company nor an instrumentation broker. GMI employs our own factory-trained engineers to ensure full control of this process.
Unlike small-time businesses and brokers, GMI goes beyond offering money-back promises. We offer real product warranties.
Apart from our meticulous inspection processes, GMI’s available warranties and multi-year service agreements guarantee customer satisfaction - no need to go through frustrating and time-consuming product returns!
Additionally, all items are thoroughly cleaned and professionally packaged/crated with care to insure they arrive in your lab ready for use.