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Summary of Contents for Better Geiger S2
- Page 1 User Manual Better Geiger Radiation Detector Model S2 & S2L Read entire manual and all instructions before use! www.bettergeiger.com...
- Page 2 1. General Information “Dosimetry” means measuring radiation dose levels specifically in the context of human health effects. The Better Geiger uses a solid scintillator sensor primarily designed to measure radiation dose rate. Except for very specialized applications, dosimetry only involves X-ray/gamma...
- Page 3 >50 hours in normally, >95 hours in dark mode. ● Minimum sensitive energy: 50 keV ● Maximum CPM (counts/min): 30,000,000 ● Maximum dose rate @ 662 keV S2: 100,000 µSv/hr (= 10,000 mrem/hr) S2L: 10,000 µSv/hr (= 1,000 mrem/hr)
- Page 4 ● Automatic energy and temperature compensation of dose rate measurement ● Display indicates over-range when dose rate exceeds maximum limit ● Alarms: dose rate and total accumulated dose ● Overall estimated dose rate uncertainty: ±30% for energies >100 keV ● Qualitative dose rate indications NORMAL: 0-1 µSv/hr HIGH:...
- Page 5 3. Basic Operation Buttons: ● Top left controls power on/off. ● Top middle cycles through display modes. ● Top right turns the clicking sound on and off. ● Bottom middle is used to access detector settings. ● Up/down/left/right functions used in some situations are indicated on the buttons themselves ●...
- Page 6 Powering on/off: Start by inserting two fresh AA batteries according to indicated orientation. Press power button to turn on. To power down, a long press of the power button is needed – the display indicates when long enough. If battery voltage is too low, the device will beep three times and automatically power down.
- Page 7 Settings: Device settings are accessed by pressing the settings button. Settings are adjusted with the up, down, left, and right buttons: ● Up and down change which setting is selected for possible change. The setting which is currently being modified is written inside a rectangle. ●...
- Page 8 4. Display Modes Mode 1: The top line shows text BATT:OK to indicate that the battery status is OK. If the battery approaches the lower limit of life then the top line will show BATT:LOW. When this happens varies widely depending on battery type, but 1-2 hours before automatic shutoff is typical.
- Page 9 Mode 3: Same as Mode 1 but with display unit counts per minute (CPM) Mode 3B: The S2L version has an extra mode between 3 and 4 that is the same as Mode 3 but shows CPS (counts per second) instead of CPM. Mode 4: “SINCE POWER ON”...
- Page 10 5. Understanding Display Numbers Counts per minute (CPM) gives the raw rate of detected interactions in the scintillator. Incoming X-ray/gamma photons can have higher or lower energies, but the CPM value only counts interactions. Radiation dose is a unit related to the health effect on the human body of radiation.
- Page 11 Dose and dose rate are connected by time. Dose rate is how quickly a person is accumulating dose while dose is the total amount received. For example, being exposed to 3 µSv/hr for 10 hours would result in a dose of 30 µSv. Sievert (Sv) or rem are generally the basic units of radiation dose.
- Page 12 All people are exposed to background radiation from natural and unnatural sources. The amount can vary widely but 2,000-3,000 µSv per year is common. At the time of writing this document, in the US the annual whole-body limit allowed for workers exposed to radiation is 50,000 µSv.
- Page 13 For comparison, a typical medical chest X-ray might expose a person to 100 µSv while a medical CT (computerized tomography) scan might expose a person to around 10,000 µSv. Acute radiation syndrome (ARS) or “radiation sickness” can result if an extremely large radiation dose is received in a short amount of time.
- Page 14 roughly according to I=1/D where “I” is intensity and “D” is distance. For example, distance increase of 2x reduces intensity to 1/4, distance 3x results in 1/9 intensity, and 10x distance results in 1/100 intensity. Therefore, when searching for radioactive material or attempting to verify whether or not an object is radioactive, the sensor position should be placed as close as possible to the potentially radioactive material.
- Page 15 exact measurement position is not very important and can be taken at approximately chest position. For measuring accurately in low radiation environments, position the detector then measure for 5 or more minutes using average values shown in “since power on” mode. To identify whether or not an object is weakly emitting radiation, perform one such measurement at least 3 ft (1 m) from the object and another very close.
- Page 16 removed for long-term storage of the detector. Unless authorized by the manufacturer, enclosure screws shall not be removed and internal components should not be modified or accessed. There is no guarantee of performance specifications, accuracy, or reliability. In no event shall the manufacturer be liable for any direct, indirect, punitive, incidental, special, consequential damages to property or life, whatsoever arising out...
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Page 17: Declarations Of Conformity
9. Declarations of Conformity FCC Supplier's Declaration of Conformity 47 CFR § 2.1077 Compliance Information Product Name: Better Geiger Radiation Detector Description: Handheld portable radiation measurement device Responsible Party: www.bettergeiger.com This device complies with the following regulations: 47 CFR Part 15, Subpart B –... - Page 18 Directives and Standards. Location: Lakewood, CO, USA Signature: Date: Sept 1, 2024. Full Name: Robert Adams. Title: Owner Declaration of Conformity In accordance with UK Government Guidance Product type: Better Geiger, Model: S2/S2L Manufacturer: 136 Technology LLC...
- Page 19 Manufacturers Address: Lakewood, CO 80226, U.S.A. This declaration is issued under the sole responsibility of the product manufacturer. The object of the declaration described above is in conformity with the relevant UK Statutory Instruments and their amendments: Regulations 2016 No 1101 - The Electrical Equipment Safety Regulations 2016, Regulations 2016 No 1091 - The Electromagnetic Compatibility Regulations 2016, Regulations 2012 No 3032 - The Restriction of the Use of Hazardous Substances in...
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