Here is a chance to own a MicroREM, calibrated and certified, for a fraction of the regular price. These are older units which aren't quite so pretty as the new ones. Because there are scratches and tape residue and they are colored slightly differently than the new units, I can't get decent money from commercial customers for them, so I pass the savings and minor ugliness on to you. Regardless, the electronics work perfectly, the meter does exactly what it's designed to do: give you an actual deep tissue equivalent dose reading in MicroREM/hour; not mR/hour. This meter uses advanced signal processing using an organic scintillation crystal coupled to a photomultiplier tube. The digital processing of the tube output yields a true equivalent dose in MicroREM, hwhich other meters simply can not do. A gamma photon at 100keV has a lot less potential to do damage to the body than a gamma photon at 1000keV. By a difference of 10x, in fact. Geiger counters disregard this and count every particle detected as if they were all at the same energy level, which can lead to profound deviations in "dose" rates which Geiger counters provide. It is entirely possible for a Geiger counter appearing to be in a field of 5R/hour (deadly in about 10 hours) when the actual man-equivalent dose (REM) is 200milliREM/hour or less. This meter reads what is actually entering your body and causing damage rather than what is hitting the detector. More extreme deviations are possible, as the Geiger counter will always read either higher or lower than the equivalent dose, which is what really matters. While many factors have been left out for the sake of simplicity, I am hoping this explanation helps some folks understand why Geiger counters aren't good tools for dosimetry when compared to this very special instrument. Isotopes have decay chains and can emit dozens of different strengths or energies of gamma rays at one time. This meter takes each and every count in to consideration, and compensates for dozens of different energies at the same time to give you a true deep tissue equivalent dose reading. This REM dose is equivalent to Sieverts. 100mREM equals 1mSv. Likewise, 100uREM equals 1uSv. It's important to be able to convert Sieverts to REM and vice-versa, as the Sievert is now an international standard. Unfortunately, makers of inexpensive Geiger counters and dosimeters are converting Roentgens to Sieverts, which is not technically sound. Unless there is a tissue equivalent scintillator (or detector diode), all those meters which are giving doses in uSv/hour are wrong. This is the most important meter in your fleet; but you might not know it yet. Battery Life >100 hr; >200 hours when two batteries are installed. Battery Type Two 9V, MN1604, or equal Detectors Internal, tissue equivalent, organic scintillator attached to PMTwith optical, bubble free silicone adhesive Radiation Types Detected: Beta, 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 nSv/h, with 'Bat. ok', 'HV ok' check circuits. Energy Range: Lower than 40keV (the low energy model detects below 10keV) to above 1.8MeV. It is universally applicable, 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 by an emergency responder or citizen during an average incident involving release of radioactivity Precision Geotropism Within ± 2% of full scale Humidity <5% change in reading from 10% to 95% Dessicant is recommended inside the meter case. 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 (1 uREM is 1 nSV) 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! If you do need a calibrated, certified instrument, please see my other items. I usually have one MicroREM and one MicroREM LE (low energy) model for sale. Since this is a parts only/non-working meter, I will not accept returns on this item; as that would set me up for people returning meters and buying another or another until they get one which works. Message me if you have questions. I really do want to help find you what you want or need, even if it means sending you to another seller! Enjoy!
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