Use with Geiger Mueller, Alpha, NaI Scintillation, and Neutron probes
Pug-7 Survey Meter features:
- Four Ranges (manual, analog)
- Lightweight
- Audio, Adjustable Speaker
- Large 3.5 inch Meter Face
- Compensation for coincidence
This lightweight radiation survey meter, with external probe, will function well in most alpha, beta, neutron, X-ray or gamma monitoring
programs. It is designed for detection, measurement and control of radiation
contamination. This
universal instrument is compatible with with several G-M and Scintillation detectors. The most common choice is the P-15 pancake G-M detector, for general purpose survey. Several probe options are available though.
The PUG-7 utilizes continuously adjustable regulated high
voltage supply 1500V (2,500 volts on PUG-7A) to operate GM, scintillation gas
proportional, BF3, or He3 detector delivering a one
millivolt + pulse. An adjustable discriminator allows full control over
system sensitivity. The pulse input is zener diode protected so that probes may
be interchanged without shutting off instrument. The high voltage system
provides sufficient output to operate Geiger Mueller tubes up to 3 inch diameter without a
loss of efficiency as well as PM tubes with voltage dividers of over 100
mega-ohms total resistance. The meter face on the PUG-7 instrument reads out in CPM or
optionally in Sieverts or CPS. Additionally, it is provided with a means for mR/hr
cards matched to any compatible external probe. These cards are transparent and adhere
to the meter face, thus contamination and radiation levels may be read
simultaneously with a variety of probes.
The shell of the instrument is smoothly finished, attractive baked enamel over
an aluminum case. The cover is machined, black anodized aluminum with white highly
visible markings. The meter with a 3.5 inch scale length presents four ranges:
0-500; 5,000; 50,000; 500,000 counts per minute, with battery check marking.
Specifications:
Indicators: Panel meter: 0-500 cpm (times range switch multiplier),
0-1,500 volts (0-2,500 V in PUG-7A and PUG-7E). Battery condition: Flashing
Red LED and Audible Sonalert. Proportional to count rate.
Ranges: 0-500; 5,000; 50,000; 500,000 cpm (opt 0-5 cps) plus mR, uR
or R/h (optionally SI units) overlay, depending on probe.
Probe Connector: BNC (optionally MHV) low noise Teflon insulated.
Battery: 9 volt transistor battery EverReady 1222 or equivalent
(150-300 hours typical life).
Dimensions: 3-1/4'' H, 4-1/4'' W, 7-1/4'' long excluding probe
holder and handle.
Weight: 2 lbs. 4 oz. Shipping weight 5 lbs.
Common Probe Choices for the Pug-7:
P-15 Alpha, Beta, Gamma Pancake G-M Probe (Geiger-Mueller) - for fast survey of laboratory bench and equipment surfaces and for frisking personnel. The P-15 uses a 1-3/4'' mica window diameter, 1.5 mg/cm2 pancake tube. Background is normally 50 to 60 counts per minute. Extremely sensitive to alphas and betas with sufficient energy to penetrate window (Betas > 50 KeV). Window is protected by a 79% open, grill to prevent puncture or other damage while presenting minimum absorption to incoming radiation. Detects 5 KeV X-Rays and above.
P-13A Pop-Up G-M Detector with Beta Window - Side-viewing, energy compensated G-M Probe, with a 30 mg/cm2 wall. Features Beta window and sliding beta shield. Energy response is ±40 KeV to 1.25 MeV ±20%. Housed in high impact plastic, which is splashproof and rugged. Dimensions, 1-3/8'' dia. x 6'' long.
P-6-LB End Window G-M Detector - Low Background Probe; end window detects alpha, beta and gamma radiation. It offers low background without loss of alpha or beta sensitivity. The 2 cm dia. x 1.5 mg/cm mica window is protected by a removable, cleanable grill. Primary use of P6- LB is for locating surface contamination. Dimensions: 30 mm dia. x 110 mm long excluding cord. Operational Voltage: 500 Volts. Detects: 5 KeV X-Rays and above.
P-28 Extended Pancake G-M detector - The "Long Arm'' Probe consists of 1-3/4'' net diameter pancake tubemounted at the end of a 40'' wand. For rapid checking of laboratory bench and equipment surfaces, floors and walls. Sensitive to soft betas, from C14, and to alphas. The 1.5 - 2 mg/cm2 window is protected by an easy to decontaminate grill. Wand is balanced and weighs only 23 ounces. The angle of the detector can be adjusted, then locked in place.
PAS-8 Alpha Scintillator - Probe features a 1-3/4'' diameter x 0.8 mg/cm2 window. For use wherever a high efficiency, low background alpha detector is needed.
PAS-9 100 cm2 Alpha Scintillator - Probe features a 4-1/2'' diameter x 0.8 mg/cm2 window. The 100 cm2 face of this probe allows rapid surveys to be made of personnel, equipment or flat surfaces. Background is in the order of several counts per hour. Sensitivity is 10 to 20% for 5 MeV alphas based on 4Pi geometry (20 to 40% based on 2Pi geometry). The protective grid is physically separated from the window thus making contamination of the window extremely unlikely. Grid may be removed for cleaning without disturbing the window.
PNS-19 Fast Neutron Scintillation Probe - insensitive to gamma radiation in fields below 100 R/hr. The n-p reaction is used to measure energy deposited by neutrons. A shaped light pipe and moderator about the ZnS.Ag phosphor gives a consistent Rem to count ratio for incident neutrons 1/4 MeV and above, within ± 30% .
PNS-20 Slow Neutron Scintillation Probe Thermal neutrons are detected by means of the boron n-alpha reaction. Probe delivers approximately 60 cpm per neutron/cm2/second and requires a 900 volt supply. The probe is 8'' long x 2'' in diameter. It is completely insensitive to gammas in fields below 10R/hr. To measure fast neutrons, use the PNS-19 probe.
Other Versions of the PUG-7 Survey Meter Available:
- PUG-7N Fast/Slow Neutron Detector
- PUG-7A: Identical to the PUG-7 but with 2500V high voltage
- PUG-7E: Identical to the PUG-7 but with zero suppress feature on any range. The Model Pug-7E includes a zero suppress feature for use in high background situations or for scintillation incorporating large crystals. The meter reading can be suppressed at least one full decade to permit reading on a lower range and therefore with greater accuracy than otherwise possible.
- Micro PUG-7U: Electronics package is PUG-7. Probe PGS-3, one inch Nal(TI) scintillator, is internal to the case but may be removed and separated on a one meter included cable. Readout is in microR/h (or SI units)
