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Topic: Dosimeter

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	U.S. Patent: 5731589 - Ultraviolet radiation dosimeter - March 24, 1998
		To provide a dosimeter which can be readily manufactured and comprises a wide measuring range with high precision, it is provided, according to the invention, that the calibrating zone (64) of the sensor (56) is inserted into a radiation-shielded clearance (66) of a double-wall element (68) being formed by folding a radiation-proof web-like material.
		An ultraviolet radiation dosimeter comprising an ultraviolet radiation sensor arranged in a dosimeter casing and including at least one measuring field and a calibrating zone, wherein the calibrating zone of the sensor is inserted in an ultraviolet radiation-shielded clearance of a double-wall element formed by folding an ultraviolet radiation-proof weblike material.
		The ultraviolet radiation dosimeter according to claim 1, wherein the sensor is formed of film material comprising a web-like support layer coated with a ultraviolet radiation-sensitive material, the ultraviolet radiation-sensitive material extending over the entire region of the at least one measuring field and the calibrating zone.
	www.everypatent.com /comp/pat5731589.html (3187 words)

	Portable dosimeter - Patent 4596932
		A portable dosimeter as in claim 1, wherein the detector circuit means further comprises signal processor means for converting the electron charge on the electrodes into a representation of the radiation in radiation measurement units.
		The dosimeter has a pair of facing, electrically-conducting, radiation-permeable electrodes spaced from each other forming a fixed, precisely-determinable volume of a gas which is ionizable by the radiation intensity which is to be indicated by the dosimeter.
		The entire dosimeter from the radiation-detecting ionization chamber to a display for indicating a representation of the detected radiation intensity may therefore be assembled as a unit and transported into the radiation for indicating its intensity.
	www.freepatentsonline.com /4596932.html (2936 words)

	Dosimeter - Nuclear Protection & Nuclear Protection Supplies (Site not responding. Last check: 2007-10-04)
		Dosimeter (Looks like a pen with the pocket clip)- This device measures measures the accumulated radiation that your body was exposed to during a walk into a "hot" zone, or a walk outside of your falloutshelter.
		The direct-reading pocket dosimeter is a portable instrument designed to measure the total dose of moderate and high levels of gamma radiation.
		Dosimeters and their required Chargers should be readily seen as an important additional asset by anyone that already understands the need for a survey meter.
	www.survivalunlimited.com /nuclearprotection/dosimeterinfo.htm (342 words)

	Direct reading dosimeter - Patent 5117113
		The radiation dosimeter of claim 1 in which the means for determining the difference in threshold voltage of said transistors includes a single constant current source and constant current source switching means for switching the current source between said transistors for temperature stability during testing.
		The radiation dosimeter of claim 6 in which the biasing means are sources of positive voltage of magnitude 6 volts and 3 volts respectively, applied to the gates of the transistors, making the transistor biased with the greater positive voltage more sensitive to radiation.
		The radiation dosimeter of claim 11 in which the duration of the test period is approximately 3 ms and the test period duration is approximately 2% of the duration of the combined bias and test periods.
	www.freepatentsonline.com /5117113.html (6801 words)

	What are Dosimeters (Site not responding. Last check: 2007-10-04)
		Dosimeters are rugged, precision instruments about the size of a pocket fountain pen, which are used to measure absorbed doses or quantities of gamma (X-ray) radiation.
		Before dosimeters can be used to measure gamma radiation, the self-contained fiber voltmeter and ion chamber (electrometer) must be charged to approximately 165 volts D.C. this is called "Zeroing".
		The Dosimeter has a viewing lens at one end and a glass port at the other so when you look into the lens at a light source you will see the scale as shown above.
	members.aol.com /allnilo/dosimeter.html (401 words)

	Dosimeter Information
		Dosimeters can also be used as stationary monitors and are attached to walls, ceilings, etc., in facilities such as particle accelerators and the nuclear reactor.
		Dosimeters should be placed in the holders so that the printed side is away from the wearer (i.e., so that the printed side can be read).
		It is important that the dosimeter be worn in the front of the body, on the trunk, somewhere between the waist and shoulders, and in an area of the highest expected radiation exposure.
	www.des.umd.edu /rs/material/rso009/film.html (1372 words)

	Direct Read Dosimeter
		Arrow-Tech dosimeters are rugged, precision instruments about the size of a pocket fountain pen, which are used to measure accumulative doses or quantities of gamma and X-ray radiation.
		A metal clip is used to attach the dosimeter to an individual's pocket or to any available object in an area to be monitored for total radiation exposure.
		Arrow-Tech dosimeters use an extremely sensitive fiber electrometer type voltmeter and a small volume of air to measure the total amount of radiation to which the instrument has been exposed.
	www.arrowtechinc.com /direct_read.htm (569 words)

	Keleket K-191 Pocket Dosimeter and Two Unknown Models (Site not responding. Last check: 2007-10-04)
		In the accompanying photograph, the long red dosimeter employs a 0 —50 R scale while the blue dosimeter covers 0 — 10 R. Each of the two is 5.25” long and 0.5” in diameter and each has a highly stylized pocket clip resembling a pen nib.
		The barrel of the red dosimeter is stamped “T101” and the barrel of the blue one is stamped “R173”.
		Another unusual feature of the red dosimeter is that the charging contact is permanently connected to the dosimeter fiber - it doesn't use a bellows.
	www.orau.org /PTP/collection/dosimeters/keleketK191etc.htm (308 words)

	STS-102 Payload: Passive Dosimeter System
		The PDS hardware consists of two kinds of radiation dosimeters and an electronic "reader." The dosimeters can be placed anywhere in the ISS to provide an accurate point measurement of the radiation at their locations.
		One of the radiation dosimeters is a thermoluminescent detector, or TLD.
		The Passive Dosimeter System is the first ISS hardware from NASA's Ames Research Center, Moffett Field, Calif. The Hungarian Space Office provided the thermoluminescent detectors, which are a third-generation version of dosimeters that flew previously on the Russian space stations Salyut 7 and Mir, and on the Space Shuttle.
	www.shuttlepresskit.com /STS-102/payload86.htm (641 words)

	CD V-750 Charger and Dosimeter Page
		The electrostatic dosimeter is a pen-like scientific instrument with an eyepiece you look into at the top of "the pen" and a charging contact at the bottom.
		The dosimeter presses onto the charging contact on the upper left and the hairline on the dosimeter's scale is zeroed by turning the large knob on the upper right.
		The dosimeter is charged by working the big fl lever until the hairline moves down scale past zero, then the hairline moves upscale slowly as the fl button is depressed.
	www.civildefensemuseum.com /cdmuseum2/radkits/dose.html (595 words)

	Pocket Dosimeter
		Pocket dosimeters are used to provide the wearer with an immediate reading of his or her exposure to X- and gamma rays.
		A direct reading pocket ionization dosimeter is generally of the size and shape of a fountain pen.
		The principal advantage of a pocket dosimeter is its ability to provide the wearer an immediate reading of his or her radiation exposure.
	www.ndt-ed.org /EducationResources/CommunityCollege/RadiationSafety/radiation_safety_equipment/pocket_dosimeter.htm (535 words)

	Personal Radiation Disometer - Environmental Health & Safety/UTHSC-H
		A radiation dosimeter or badge does not provide protection but detects and measures radiation that you have been exposed to.
		If you are expecting dosimeters and you do not receive by the third working day of the month, please call the Radiation Safety Division for further details.
		At the end of the month or quarter, dosimeters must be returned to Radiation Safety as promptly as possible to expedite the processing.
	www.uth.tmc.edu /safety/radsafety/dosimeter.htm (736 words)

	Direct Read Dosimeter (Site not responding. Last check: 2007-10-04)
		A quartz fiber dosimeter is a precision instrument consisting of an ionization chamber (1) sensitive to a desired radiation; a quartz fiber electrometer (2) to measure the charge; and a microscope (3) to read the shadow of the fiber on a reticle (4).
		As the dosimeter is exposed to radiation, ionization occurs in the surrounding chamber decreasing the charge on the electrodes in proportion to the exposure.
		Our dosimeters are hermetically sealed for consistent readings of gamma and x-ray radiation under a broad range of environmental conditions.
	www.dosimeter.com /directread.htm (452 words)

	Highbeam Encyclopedia - Search Results for dosimeter
		The biological action of radiation is not fully understood, but it is believed that a disturbance in cellular activity results from the chemical changes caused by ionization (see ion).
		Difference between dosimeter and tidal breathing methacholine challenge: contributions of dose and deep inspiration bronchoprotection.(laboratory and animal investigations)
		Adaptation of a pocket PC for use as a wearable voice dosimeter.
	www.encyclopedia.com /searchpool.asp?target=dosimeter (302 words)

	Passive Dosimeter System (Site not responding. Last check: 2007-10-04)
		It consists of TLD dosimeters to accumulate dose and a Reader to measure that dose on-orbit.
		This glow curve is compared with the characteristic glow curve of the crystal and the difference is integrated by the controller, providing a total dose measurement.
		All the information about the reading including the time, date, dosimeter serial number, reader serial number, characteristic crystal glow curve, measured glow curve, and time since last reading is all recorded on the memory card.
	spaceprojects.arc.nasa.gov /Space_Projects/SSBRP/pd.html (816 words)

	radiation, radiation detection, detection, Radiation Pager, RADOS, SAIC, MGP, SE International, Dosimeter,Alarming ...
		The dosimeter is fully programmable and has data logging capability of up to 1000 dose values.
		Direct Read Pocket Dosimeters are rugged, precision instruments about the size of a pocket fountain pen, which are used to measure accumulative doses or quantities of gamma and X-ray radiation.
		It is pocket-size, conductive-fiber electroscope with an ion chamber for detecting and indication integrated exposure to gamma and x-radiation.
	www.laurussystems.com /products/Dosimeters_and_Readers.htm (467 words)

	Radiation Dosimeter DRGB-90
		The dosimeter is intended for use at temperatures from 263 to 313 °K (-10 to 40 °C, 14 to 104 °F).
		The radiation dosimeter is used as a portable handheld device.
		The radiation dosimeter weighs is 0.25 kg (7 ounces avoirdupois)
	www.sensorsportal.com /HTML/E-SHOP/PRODUCTS_7/Dosimeter_DRGB_90.htm (210 words)

	Using a Dosimeter
		In order for the radiation type and energy to be determined, the dosimeter must be worn so that the front of the dosimeter faces towards the source of radiation.
		This phenomenon is called thermoluminescence and dosimeters that use this principle are often referred to as TLDs (thermoluminescent dosimeters).
		The minimum detectable dose for TLD ring dosimeters is 30 millirem for x-rays and gamma rays and 40 millrem for energetic beta radiation.
	web.princeton.edu /sites/ehs/dosimeter/dosimetryinfo.htm (1459 words)

	Noise Dosimeters
		Dosimeters are “Dual Threshold” and measure AL and PEL simultaneously
		Clip the dosimeter to the subject’s belt, or put it in the subject's pocket.
		You can sample for less than 8 hrs, and the dosimeter will calculate what an 8 hr exposure would be if the noise had continued at the same average level.
	www.mine-safety.mtu.edu /noise/06dosimeters.htm (927 words)

	Noise and Hearing Conservation Technical Manual Chapter: Evaluation (App III:A)
		Determine an employee's noise dose whenever use of a noise dosimeter is unavailable or inappropriate.
		However, the dosimeter is actually worn by the employee in order to determine the personal noise dose during the workshift or sampling period.
		For noise that is impulsive in nature, a dosimeter meeting the 1991 version of the standard is recommended.
	www.osha.gov /dts/osta/otm/noise/exposure/instrumentation.html (814 words)

	.:. Radeco .:. Radiation Detection Company - RADView PD dosimeter
		Originally developed for the medical industry, the active component in the dosimeter is a microparticulate, radiation sensitive diacetylene monomer dispersed in a polymer matrix and applied to a polyester film base.
		The dye polymer is cyan blue with a major absorbance peak at 635 nm and a minor peak at 585 nm and appears gray on the badge under the UV filter.
		The dosimeter will tolerate intermittent UV exposure and temperatures up to 140°F. Under most conditions, the dosimeter can be worn for one year before replacement.
	www.radecoinc.com /products/radview.html (718 words)

	Scott Instruments - Products
		They indicate the presence of these gases by means of a highly specific chemical color reaction in which the amount of color produced is directly proportional to the concentration of gas and the time of exposure.
		The dosimeter is held in place behind the dose estimator so that a window overlays the stained area on the dosimeter badge.
		The color wheel is rotated until the color segment matching the dosimeter stain in density is found.
	www.scottinstruments.com /products/product.cfm?ID=150 (290 words)

	JP Laboratories, Inc. Introduces RADTriageTM, a Dual Sensor Personal Smart Dosimeter (Site not responding. Last check: 2007-10-04)
		Over 6000 dosimeters have been field-tested by various governmental agencies, public safety teams, and the general public with zero complaints in the past two years.
		JP Laboratories, the pioneer in self-indicating dosimeters, is a minority-owned research and development company.
		Dosimeter to be used by First Reponders and the General Public.
	www.prweb.com /releases/2006/7/prweb416683.htm (711 words)

	Radiation Materials Authorization
		Individuals under 18 must wear a dosimeter if there is likelihood of a detectable exposure.
		Extremity dosimeters (ring badges) must be worn if exposure to the hands and forearms greater than 10% of the permissible limits is possible.
		If you work in a laboratory in which gamma emitters or energetic beta emitters are used, you may request radiation monitoring badge, even if you do not meet the criteria for required monitoring.
	www.brown.edu /Administration/EHS/radiation/dosimeter_request.htm (337 words)

	Wearing Your Personnel Dosimeter (Site not responding. Last check: 2007-10-04)
		You should wear your dosimeter ("film badge") whenever you are working with x-ray equipment, radioactive patients or radioactive materials.
		Ring Dosimeter: Ring dosimeters (used for measuring beta and gamma dose to the hand) should be worn on the hand which is closest to the radiation source.
		If you are double-badged, wear the red-labeled dosimeter at collar level outside your lead PPE (the usual location) and the yellow-labeled dosimeter under the lead PPE as shown.
	www.safety.duke.edu /Radsafety/dosim/badge_tutorial.htm (378 words)

	dosimetro a petto e ad anello - chest dosimeter or ring dosimeter (Italian to English translation glossary) ...
		The two types of badges that may be issued to workers are the chest dosimeter or ring dosimeter.
		If lead aprons are worn, the badge should be clipped to the shirt collar or to the outside of the top of the lead apron to measure exposure to the eyes.
		"Extremity ring dosimeters shall be worn on the hand likely to receive the highest radiation dose, and positioned such that the TLD chip is exposed to the radiation source.
	www.proz.com /kudoz/713945 (409 words)

	doseBadge Noise Dosimeter or DoseMeter for Assessing a Worker's Exposure to Noise
		doseBadge Noise Dosimeter or DoseMeter for Assessing a Worker's Exposure to Noise
		Noise Dosimeter for measuring a worker's exposure to noise
		There is also a huge cost saving where multiple dosimeters are required as the cost of multiple badges is much less than that of traditional noise dosimeters.
	www.noisemeters.com /product/dbadge.asp (405 words)

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