Please note: if you need NRC exempt sources of a broad spectrum of isotopes for testing of your instruments, please contact me and I will gladly help you find what you need at the absolute best prices available. Now, the instrument: The instrument shown is the Thermo version, the same instrument being delivered will be the Bicron/Thermo brand. It is equally perfect. This instrument combines parts from the four best companies in the industry. The basic design is Bicron, with the knife edge metal faceplate and meter manufactured by Eberline. The most important part, the proprietary organic tissue equivalent scintillator crystal, is made by the Ludlum subsidiary; St. Gobain, and the PMT by another Ludlum subsidiary, ADIT. And Thermo-Fisher is the one who sells it. It came together amazingly well and uses all of the best attributes of each company. This is the high energy detection model, which has a slightly flatter detection curve, and can detect down to 20keV (more like 5 in actual practice) rather than the 40keV which I also sell on eBay. I don't have many of these. This is much newer than Bicrons older identical line; it is a Thermo model, but you will easily be able to see the Eberline razor metal face plate and it looks and operates exactly like its Bicron predecessor. It's quality is unparalleled. This unit continues to be one of the most popular in the industry for real time, tissue equivalent dosages without additional calculations or equations. Instead of counting mR or R/hour (roentgen), it counts MicroREM. Roentgen is the actual amount of radiation which is hitting the detector rather than what is actually entering or being absorbed by your body. This is known as a tissue equivalent organic scintillation counter. This model has the added benefit of being able to count low energy gamma, all the way down to soft x rays, and still will measure an accurate equivalent dose in addition to gamma rays of much higher energies as well. This also means that mid-range x rays which would count as a little higher on the regular MicroREM will be compensated for energy, so the reading will be a little bit more accurate. The Sievert is the new standard absorbed dose measurement which has been adopted as a worldwide standard. One uSv (microSievert) equals one milliREM. One nanoSievert (nSv) equals one MicroREM. It took some practice to get used to, and most of us still use REM whenever we can get away with doing so. Even when filing regulatory documents, which goes to show how enthusiastic we all are about the change... But at least this meter makes it easy. One MicroREM is equal to one nanoSievert. Absorbed dose, once again, is much different than the familiar mR/hour, which has always universally stood for milliRoentgen/hour, not milliREM/hour. There are many factors in determining how much radiation is absorbed in to the body, and this meter compensates for those variables to give an actual dose rate that is equivalent to what your body tissues are receiving. Hence the name: tissue equivalent organic scintillation counter. The "organic" part refers to the composition of the crystal rather than the carbon basis of our bodies, by the way. REM means Roentgen Equivalent-Man. The alloy casing, composition of the organic scintillation crystal, and advanced circuitry in this meter derives an actual biologically valid dose rate in milliREM (on the x1000 setting); equivalent to uSv/hour, and MicroREM; equal to nanoSieverts per hour on the lower settings. I know it's an earful, but it's also a new worldwide standard, so let's try to get used to it together, ha. Geiger counters, dosimeters, proportional counters, and regular scintillation counters can't acquire this measurement; which is why this instrument is so tremendously important for health physics and radiation protection personnel. Here's the specs from the manufacturer: Battery Life >100 hr on one battery or >200 hr with 2 batteries inserted. Battery Type One or Two 9V, MN1604, or equal. Detectors Internal, tissue equivalent, organic scintillator, with aluminized Mylar windows on probe and on front of meter Radiation Type Gamma and X-ray Accuracy Within 10% of reading for Cs137 between 20% and 100% of full scale on any range Display Type Ruggedized, recessed, high-torque 1mA meter protected by impact resistant Lexan polycarbonate window with 85.1mm (3.35 in.) scale marked: MicroREM/hour. This is conveniently equivalent to 0 to 200 nanoSv/h, with 'Bat. ok', 'HV ok' check bands. Also, the needle fluoresce a under long wave UV light, super brightly! I don't know why this isn't in the manual, because there's an obvious military or crazy doomsday prepper person with a dozen AR-15s (I only have five, more than that just seems excessive for a guy who lives alone!) advantage in not being seen AND having accurate info regarding radiation levels. Energy Range: 10keV to 1.3MeV and is used for any application concerning low/medium level gamma dose rate surveys. Here are some examples: -Confirming radiation boundaries -Planned-dose situations to determine exposure times and other precautions -Monitoring items for unrestricted release -X-ray surveys -Background radiation monitoring -Earth and soil monitoring -Monitoring of food and goods -Postal regulation compliance -Mineral scouting and collecting -Emergency response; as this is the most likely range of dose which will be experienced during an average incident involving release of radioactivity -Knowing which food will kill you less quickly if Vlad accidentally sits on the red button while doing Pilates, what's the deal with Putin's new fitness kick anyway? -Creative use could save your life. One example: When using in a disaster, it is easy to improvise a way to figure out a much higher dose range with the proper shielding, which is worth learning about. 1cm of lead will double the range, 2cm will make it x4, 3cm will make it x8, 4 cm is x16 5 is x32, 6 is 64, 7cm is 128x 8cm is 256x that max 10cm is 1024 times that 200milliREM/2mSv dose rate on the meter, so on and so forth. Improvise by hammering down fishing weights and using a caliper or whatever if you have to. It may not be precise... But it's just how physics works, it doesn't all have to be complicated. Anything is better than nothing is crunch situations; I've done weirder things in the field! Even behind the shielding, it will show the equivalent dose rather than just how much radiation is hitting the detector like most meters. I obviously really like this meter. Precision Geotropism Within ± 2% of full scale Humidity <5% change in reading from 10% to 95% Range Five linear ranges: MICRO REM: X0.1: 0 to 20µrem/h X1: 0 to 200µrem/h X10: 0 to 2000µrem/h X100: 0 to 20,000µrem/h X1000: 0 to 200,000µrem/h (1mREM EQUALS 1µSv, 1uREM equals 1nSv.) Response Time Optimized for each range, 0-90% of final reading as follows: Range: : Time: X0.1 : <15 seconds X1 : <15 seconds X10 : <5 seconds X100 : <2 seconds X1000 : <2 seconds Shock 100g per lightweight machine of MIL-STD 202 C, method 202 B Temperature (English) Operating -4° to +122°F Temperature (Metric) Operating -20° to +50°C Vibration 5g in each of three mutually orthogonal axes at one or more frequencies from 10 to 33 Hz. Please note: the internal potentiometers and switches are for use only while calibrating the instrument. There is no need to touch them, and to move their position could have an effect on its precise calibration. This is a dedicated instrument, and is the most important one in any kit! The calibration is difficult and takes four hours because many sources and electronic tests are involved. If you have a master standards office or radiation safety officer with which you would like me to confer so you can use this instrument in your practice, I will do that. Nuclear generating stations and nondestructive testing companies are the most frequent purchasers of this meter. Message me if you have questions.
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