6/17/2013

iMetry - The example of measurement in lead box - Geiger Counter/Spectrometry (Spectrometer,Spectroscopy) for iPad


Radiation Geigercounter of inside of a lead box(Thickness:50mm)


Spectrometry of inside of a lead box (Thickness:50mm) (log scale)


Radiation Geiger counter of inside of a lead box with copperplate (Thickness: lead block 50mm, copperplate 1mm)


Least descrimination sensitivity of iMetry would be, in this example, relative MDA would be around 0.00024μSv/h@ 1 hour measurement, with 3SD accuracy, under 50mm lead box with 1mm copper shielding, at 0.06 μSv/h background. In this case, cables from imetry should be guided, through V shaped canal.
  • Sensitivity parameter may vary for each individual difference.

Spectrometry of inside of a lead box with copperplate (Thickness:lead block 50mm, copperplate 1mm) (liner scale)


Spectrometry of inside of a lead box with copperplate (Thickness: lead block 50mm, copperplate 1mm) (log scale)



Radiation Geiger counter of inside of a lead box with copperplate (Thickness: lead block 50mm, copperplate 1mm)

Least descrimination sensitivity of iMetry would be, in this example, relative MDA would be around 0.00024μSv/h@ 1 hour measurement, with 3SD accuracy, under 50mm lead box with 1mm copper shielding, at 0.06 μSv/h background. In this case, cables from imetry should be guided, through V shaped canal.
  • Sensitivity parameter may vary for each individual difference.

Spectrometry inside of a lead box with copperplate (Thickness:lead block 50mm, copperplate 1mm) (liner scale)






iMetry - The example of measurement - Geiger Counter/Spectrometry (Spectrometer,Spectroscopy) for iPad


The example of measurement

Radiation Geiger counter


137Cs Spectrometry (liner scale)


133Ba Spectrometry (liner scale)


134Cs & 137Cs Spectrometry (liner scale)


40K Spectrometry (log scale)


60Co Spectrometry (liner scale)



Background Spectrometry inside concrete building (222Rn) (log scale)









6/16/2013

iMetry - Specification - Geiger Counter/Spectrometry (Spectrometer,Spectroscopy) for iPad


Spectrometry Geiger counter iMetry Specification (iMR3 A211 OoMER1)

AccessoriesUSB cable(microB to A), audio cable (mini-jack 2 contacts to 4 contacts, rough calibration sheet)
Power supply
Operating voltage
USB power supply(DC 3.3-5V)
Current consumption26.5mA
Sensor unitPhoton Counter (MPPC) and CsI(Tl) Scintillator
Detectable radioactive ray typeGamma ray
Gamma dose range0.001μSv/h - 10μSv/h *1*3
Sensitivity6000 cpm/(μSv/h) *2
Energy range<200 keV ~ 2000< keV *2
Operating temperatureRoom temperature (no condensation), recommended operating temperature is 77°F.
SizeW25.0mm × H25.1mm × D53.3mm(Without projection)
Weight42.8g
Closure materialAluminum engraved

  • 1 This gamma dose range does not mean equipment limitation. And lower limit does not mean MDA. This highest dose range is due to the dose error by rough provided rough calibration.
  • 2 These performance parameters are vulnerable to individual difference and individual calibration condition of sensor modules.
  • 3 Energy compensation is not executed yet. Right now, provided calibration sheet is arranged to fit to background radiation value, cesium 134/137 radiation would be under estimated around 30%. This issue is not hardware issue, but would be resolved by some future software release.

iMetry - Getting started - Geiger Counter/Spectrometry (Spectrometer,Spectroscopy) for iPad


Getting started

An easy setup is required before using beginning. How to use iMetry only pushes a "Start" button, and is easy.
  • Please install iMetry app from AppStore.
  • Make sure, and 'don't forget to change pulse threshold value form 200 default value to 100. The software have 200 as default, and now, provided parameter uses 100 instead!
First, If the table of the following figure contained in a package is set to app, after that, The rest only pushes a "Start" button.  

iMetry - Overview - Personal Gamma Spectrometry(Spectrometer,Spectroscopy) & Geiger counter

Overview

When iMetry detects radiation, iMetry outputs analog pulse corresponding to the energy of the radiation. Connect iMetry to headphone/mic mini jack of iPad with included audio cable, start measurement in the iPad application, application will record pulses. As a geiger counter, measures radiation counts(cpm) and μSv/h meanwhile as a spectrometry compiles radiation energy spectrum.
Please don't forget to input instant calibration parameters, attached within iMetry package, before making use.



Before Getting Started

iMetry, the detector module is made by extreme super analog circuit, nothing digital, made by extreme super analog technology, and quite sensitive sensor module, so, we call it as pickup unit. it's just like turntable pickup unit. If you understand that, you can make use of it efficiently. The sensor circuit itself is quite sensitive to thermal drift, and thermal drift is compensated by analog electronic circuit, but make sure, before making use, to ensure temperature stability of the equipment environment, so as not to cause thermal drifting, because, temperature gradient cannot be compensated, so as to make it work, temperature compensation circuit, equipment should be placed in the same temperature environment, and power supply should be supplied before usage, to realize thermal equilibrium.


Interface



  • Power LED - Green LED lights up when power is supplied.
  • Detection LED - Flashes at brightness corresponding to the energy of detected radiation.
  • micro USB - Used to supply power to iMetry(DC 3.3-5V)
  • 3.5mm Audio port - Outputs analog pulses, corresponding to the energy of detected radiation.


Power supply

iMetry works on commonly-used micro-B USB power supplies.
It takes more than 3 minutes from power up to stabilization of radiation sensor. Please wait a few minutes before you start measurement, for accuracy.
When powered up, iMetry starts to detect radiation, red LED flashes at brightness corresponding to the energy of detected radiation.
When power is pulled out, LEDs may flash, but not due to radiation detection.
AC power supply
Mobile phone charger
You can use chargers cell phone and smart phone chargers with iMetry, but note for followings.
  • Some chargers, like ones with 3 AA batteries, may not supply power properly due to chargers' protection circuit.
    • In that case, pull out the charger connector from iMetry, wait awhile and try again.
  • When chargers run out of battery, iMetry may detect extraordinarily huge cpm value with red LED on, but that's not due to radiation detection.
    • Please replace batteries and try measuring again.

Storage and handling precautions





  • As iMetry make use of delicate potentiometers and sensors, dropping or high impact may cause its adjustment change.
  • No Wet. If water drops on iMetry, please wipe it off as soon as possible.
  • Do not keep iMetry in following locations.
    • Under direct sunlight
    • Around water place
    • In high humidity
    • High(over 60 deg C) temperature (near heating or on a car dashboard)
    • Extreme cold (refrigerator or outside in winter)


Operating precautions


  • Please note followings when you operate.
    • Operate iMetry on non-conductive surface, such as desks.
    • Please operate iMetry indoors, air-conditioned room temperature environment. (Though iMetry equips thermal correction circuit, iMetry cannot follow rapid temperature change.)
    • Please operate iMetry in quiet, vibration-free location.
  • For more accurate simplified measurement, it is preferable to keep room temperature, conduct simplified calibration (parameter change) for energy with standard radiation source, for dose with standard radiation source and calibrated dosimeter respectively prior to operation.
  • iPhone and iPad works fine with iMetry, but please avoid some Pocket Wifi routers and other electronic devices, which emits radio-wave or electric noise.
  • Friction between iMetry closure and metal objects may cause noise and disturbance in measurement. Please put iMetry in a plastic bag on measurement, to avoid direct friction.
  • Please plug audio and USB connectors firmly, as halfway plugging may cause noise detection.
  • It requires long measurement in shielded environment to detect low-dose samples, as radiation dose rate go along Poisson distribution.
  • When you plug in audio cable, iMetry may count noise and flash LEDs, as a result of iPad's behavior, such as switching input device, that's not due to radiation detection.
  • Unplugging iMetry side of audio cable may cause detection of pulses as high as 3000cpm, that's not due to radiation detection.
  • Likewise, unplugging iMetry side of power cable may cause detection of pulses as high as 3000cpm, but that's not due to radiation detection, either.


6/14/2013

iMetry - Brochures - Personal Gamma Spectrometry(Spectrometer,Spectroscopy) & Geiger counter



Smallest class spectrometry, geiger counter and radiation detector module

The stylish yet functional spectrometry entry model.The size is only 25×25x53 (mm), and 43g weight.
It is the world smallest spectrometry to carry easy!

Measure with your iPad

Touch and Go
The measuring result come out to iPad’s wide screen.

Check it Visually
You can check sequential data by graphic chart.


Quick and Sensitive

High Sensitivity
Sensitive scintillator and semiconductor module realizes you awesome sensitivity.


Interfaces

Audio port is used for data output to iPad, and mini USB port is for power supply.

Radiation indicator LED blinks in proportion to the value of radiation energy.

Other Spectrometry related sites


Other Spectrometry related sites

iMetry fc2 wiki (English)
iMetry fc2 wiki (Japanese)
iMetry_ja (japanese)
iMetry livedoor wiki (japanese)