Technical Associates

TAModel MEDA-SP -RAD Safety Water Monitor

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The MEDA-SP Ratemeter features an internally mounted 2 inch pancake GM detector with window looking downward from bottom of case and an external crystal scintillation probe for detection of low energy Gammas. A sliding shield protects pancake detector when not in use. This system is half the weight of other systems.

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  • Roadside Chemical Spill
  • Industrial Accident
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  • Use MEDA-SP Anywhere
  • Gamma emitters, submersible sensor probes for reservoir, stream or sump.
  • Alpha & Beta emitters in water samples
  • Quick determination of water contamination
  • Easy detection of surface contamination-Alpha, Beta, Gamma; hands, boots, clothing and equipment
  • Identify personnel needing decontamination
  • Search out stored radioactive materials or dirty bombs using Gamma probe

Arrive at location of accident or attack

  • Submerge Gamma sensor into reservoir, stream or sump.
  • Increasing count rate indicates contamination by Gamma emitters.

Use PAN-AL (disposable Planchet)

  • Place sample of suspect water in evaporator (EVAP-SP) for one minute
  • Place sample under built-in pancake detector on bottom of ratemeter
  • Increased count rate indicates contamination with Alpha or Beta emitters

To Separate Alphas, Betas, and Gammas

  • Built-in sliding beta filter is standard
  • Alpha filter is optional

If count rate exceeds 2 times background, water is not safe.

  • Use built-in pancake GM detector on bottom of ratemeter to check people, clothing and objects for surface contamination.
  • If count rate exceeds 2 times background, the person should take off the contaminated clothing.
  • If count rate continues to exceed 2 times the background, hose them down and measure again.
  • Gamma probe count rate will increase as you approach a cache of radioactive materials. Knowing this you can search a car or check-out suspicious objects.
  • Meter: Rugged, recessed 2-1/2`` meter.
  • Ranges: 4 linear for each detector:
    • 0-500; 5,000; 50,000; 500,000 cpm for external
    • 0-0.15; 1.5; 15; 150 mR/hr. for internal detector.
    • Other scales and overlays available: Sieverts, etc.
  • Range Switch Positions: Off; Battery Test; X1; X10; X100; X1,000.
  • Detector Switch (Toggle): Internal (pancake), External (scintillator) PGS-3SUB
  • Time Constant Switch: Fast, Slow (approx. 2 & 11 sec.)
  • Detectors:
    • 2`` O.D. Pancake Geiger for internal Alpha/beta,
    • Submersible, high sensitivity Gamma scintillation probe 1"x1". Nal (Tl) crystal standard.
    • 2"x2" crystal optional.
  • Calibration: Single master Cal Pot for each detector, plus individual Cal Pot for each scale. Pots adjust from outside case.
  • Power: 9V transistor battery (Eveready E1220 or equivalent).
    • Battery life - 100 hrs with normal operation.
  • Dimensions: 3`` (7.6cm) wide x 5-1/4`` (13.3cm) long x2-1/4`` (6cm) deep.
  • Total Weight: 2.5 lbs. (including probe and battery)
  • Shipping Weight: 4.4 lbs.

Accessories Include:

  • EVAP-SP: Sample evaporator with vehicle adaptor or battery.
  • PAN-AL: Disposable aluminum Planchets for sample evaporation.

Options:

  • PAN-SP: Re-usable planchets.
  • PGS-3LSUB: 2"x2" crystal probe
  • STB-3: Shielded pancake tube detector for enhanced Alpha beta sensitivity
  • BAT-EVAP: Battery for evaporation process