Radiation in Water Detectors - Model MEDA-SP

Features

• Two seperate detectors
• Submersible gamma detector
• T-1190 Alpha, Beta detector
• Lightweight - fits in briefcase

Applications

• Roadside Chemical Spill
• Industrial Accident
• Terrorist Water Poisoning
• Dumping of Medical/Industrial Waste

Site Location

• Use MEDA-SP ANYWHERE

General Description

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.

Measurement Capabilities

• Gamma emitters , submersible sensor probes for reservoir, stream or sump.
• Alpha and beta emitters in water samples
• Quick determination of water contamination
• Easy detection of surface contamination-alpha, beta, gamma; hands, boots, clothing, equipment
• Identify personnel needing decontamination
• Search out stored radioactive materials or dirty bombs using gamma probe

Specifications

• 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 emitters.
  • 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.
• PAN-AL: Disposable aluminum planchets for sample evaporation.

Options

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

Description of Use

1. Arrive at location of accident or attack
   • Throw gamma sensor into reservoir, stream or sump.
   • Increasing count rate indicates contamination by gamma emitters.
2. Use PAN-AL (disposable planchet)
   • Place sample of suspect water in evaporator (EVAP) for one minute
   • Place sample under built-in pancake detector on bottom of ratemeter
   • Increased count rate indicates contamination with alpha or beta emitters
3. If count rate exceeds 2 times background, water is not safe.
4. Use built-in pancake GM detector on bottom of ratemeter to check people, clothing and objects for surface contamination.
5. 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.
6. 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.

MEDA-SP Detectors (Comparison)

T_A TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303
TELEPHONE (818) 883-7043 * FAX (818) 883-6103