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Detector Geiger Counter (no longer available)

11.00 LBS
  • Product Description

    This item is SOLD OUT.

    The Detector, comprised of the Model 4007A Traditional Geiger Counter configured with the Model 360 External Pancake Probe, is designed for general contamination detection and frisking, and at an ultra sensitive level. 

    The base unit of the Model 4007A itself is a portable, hand-held survey meter providing three operating ranges reading on a dual scale up to 50 mR/hr or 30,000 CPM (optional readout available in uSv/hr and CPS).  See the close-up picture below, also noting the battery check feature at the right end of the gauge.

    3007ametertn.jpgThe survey meter incorporates a sealed, splash proof speaker which produces the audible clicks.  The speaker is powered by a separate 9-volt battery and can be turned off in case the meter is inadvertently left on, preserving the other "D" batteries to continue operating the meter itself.

    The instrument includes a 3 foot straight cable with BNC/BNC fittings for connecting the survey meter to the probe. Although of a traditional design, the Model 4007A Survey Meter is a fully modern unit, with completely redesigned and up to date transistorized electronics, and with calibration at the factory in accordance with industry standards.

    The Model 360 Pancake Probe, shown cradled in the meter’s handle above, and rotated upside down to display the pancake detector, is designed for general purpose contamination monitoring.  The long angled handle facilitates frisking surfaces in difficult locations without contaminating hands or gloves. 

    The broad pancake detector, combined with its close proximity to the front surface of the probe, gives excellent efficiency for Alpha and weak Betas, and provides sensitivity to low energy Gamma and X-radiation.  In specific, the large area thin mica window, with a thickness of only 1.8 to 2.0 mg/cm², allows detection of Alpha radiation as low as 3.0MeV when in close proximity to the window, Beta radiation in excess of 35keV, and X-ray or Gamma radiation greater than 6keV.

    This product typically ships within about 2 business days.  Specify between standard readout in mR/hr and CPM (default), or alternate readout in uSv/hr and CPS.

    Specifications of Model 4007A Survey Meter for Detector:  

    Operating Ranges

    0 to .5 mR/hr; 0 to 5 mR/hr; 0 to 50 mR/hr; 0 to 300 CPM; 0 to 3000 CPM; 0 to 30000 CPM

    Optional Readout uSv/hr and CPS


    ± 20%


    ± 20%

    Warm Up Time


    Response Time

    5 second time constant

    Temperature Range

    - 10 to + 50° C (14° to 122° F)

    Relative Humidity Rng

    20% to 95%

    Visual Readout

    Easy-to-read 2.62" round meter

    Audio Readout

    Speaker; clicking type headset is optional

    Detector Voltage

    920 volts


    4 position selector switch (off; x1; x10; x100); Battery check and Speaker on/off switch


    One 9 volt cell for speaker (NEDA 1604-A or equal)


    2 standard “D” cells (1.5 volt)


    Microphone connection for optional headset; BNC for probe connection

    Calibration Pre-calibrated at the factory


    Rugged fiberglass body and cover


    4"W x 9"L x 5" H.


    4.5 lbs. including detector


    1 year on meter (see probe for separate warranty)


    Specifications of Model 360 Pancake Probe:  



    Radiation Detected Alpha, Beta, Gamma,     X-ray

    Detects alpha as low as 3.0 MeV
    Detects beta > 35 keV
    Detects gamma > 6 keV thru window

    Temperature Range

    - 20° to + 55° C  (- 4° to + 131° F)

    Maximum Altitude

    7,500 ft


    Mica 1.8-2.0 mg/cm²

    Window Diameter

    44.5mm (1.75")

    Detector Overall Length 11 1/4"(28.6cm)
    Detector Handle Angle ~25 degrees

    Detector Handle Length

    8 1/2”

    Detector Head Diameter

    2 3/8" (6.0cm) 1(2.5cm)

    Detector Head Thickness

    1" (2.5cm)

    Dist. between Window & Probe Surface

    0.125” (3.2mm)

    Weight of Detector

    14 oz. (400g)

    Material of Detector Housing


    Warranty 1 yr on probe, 90 days on GM tube
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