- The poCAMon personal online continuous air monitor combines a very compact design with a high flow rate and long battery life. The unit measures long living aerosols as well as short living Radon daughters by alpha spectroscopy and beta counting. The instrument recognises if only natural Uranium aerosols have been collected and adjusts the related dose coefficients automatically. The continuous peak shape adaption results in an accurate natural background compensatione independent on filter exhaustion and particle size.
- A bright alpha numeric display and the clear keypad allow the operation even under harsh conditions.
- The integrated powerful charger recharges the unit within two hours.
- There are sensor options for Carbone monoxide and combustible gases as needed in underground mines. Optical and acoustic alerts will warn the user immediately in case of dangerous situations. For first responders, an optional wireless interface (Net Monitors by ZigBee) allows the officer-in-charge to receive the data online from the action forces. The instrument can be ordered also with a GPS receiver.
Thông số kỹ thuật
- Detector :
+ 400mm² ion-implanted silicon detector
+ Energy range 0.15..3MeV (Beta); 3…10MeV (Alpha)
+ Counting efficiency (4) approx. 20%
+ Open face sampling for minimum collection losses
- Filter :
+ Membrane filter (PTFE); 3µm pore size; 25mm dia. with Neoprene sealing
+ Deposition rate >99,9%
+ Active filter test with respect to perforation and exhaustion
+ Tool-less replacement of the filter
+ More than 1 month operation in “normal” environment
- Pump :
+ Low noise quality rotary van pump
+ Nominal air flow 3l/min (adjustable range 1.5 to 3l/min)
+ Processor controlled air flow for constant deposition conditions
+ Pressure drop across the filter 5…20mbar (at 3l/min)
+ Noise emission approx. 48/51dBA (in 1m/30cm distance)
- Results :
+ Equilibrium Equivalent Concentration (EEC) for Radon and Thoron daughter products in Bq/m³
+ Exposure for Alpha and Beta emitters (LLRD) in Bqh/m³
+ Dose for Alpha and Beta emitters in µSv or DAC-hrs (dose coefficients adjustable by user)
+ Detection of Natural Uranium with automatic selection of the Unat dose coefficient
+ Average activity concentration for Alpha and Beta emitters in Bq/m³
+ Separate channel for Alpha gross counting in cps or Bq or Markov Algorithm for Radon daughter product grab sampling
+ Flow rate, filter exhaustion, battery voltage
- Standards :
+ IEC 60761-1
+ IEC 60761-2
+ IEC 61578
+ IEC 61577-3
+ IEC 1263
+ CE
- Compensation :
+ Compensation of natural Radon background by Alpha spectroscopy with dynamic fitting of peak shape with respect to progressive filter exhaustion
+ Upper Alpha energy threshold for LLRD = 5,6MeV
+ Static compensation of Gamma background
+ Dynamic shock rejection (mechanical shock) by pulse signal shape analysis
- LLRD Sensitivity : approx. 2cpm/(Bqh/m³)
- Measurement range :
+ 0…125000Bqh/m³ (0…625000 DACh(Pu))
+ 7.5MBq/m³ over 1 minute or 16kBq/m³ over 8 hours
- Measurement
+ Up to 16 user definable sampling cycles (1s to 1year)
+ Predefined sampling cycles 1 and 30 minutes as well as 12 hours filter analysis (without pump)
- Detection limits See tables below
- Alert indication :
+ Configurable alert thresholds for all measured results
+ Bright alert LED with yellow and red light
+ 85dB signal buzzer
+ Alert indication at display
+ Alert reset is configurable (either with confirmation by the user or automatic reset if the alert condition is no longer present)
+ Pre-defined alerts for LLRD activity, low/high count rate, filter perforation
- Data storage :
+ 2GB SD card (> 1,200,000 data records)
+ Storage of all measured raw data incl. spectra
+ Handling
+ Large alphanumerical display 4 x 20 characters
+ High contrast even in direct sunlight
+ Backlight
+ Three buttons, operation with gloves possible
+ Intuitive, straight forward menu structure
+ Interface USB, Net Monitors wireless (ZigBee)
+ Power supply
+ Standard NiMH battery pack 12V/3.8Ah
+ Power adapter 18V/3A
- Housing :
+ Ergonomic and smart design
+ Ease of decontamination
+ 106mm x 56mm x 200mm
+ 1.3kg
- Ambient conditions :
+ 0…50°C
+ 5…95%rH, noncondensing
- Software dVISION :
+ Remote control
+ Data transfer, visualization
+ Data management, export to text files
+ System configuration
+ Creating/Editing of measurement cycles
+ Network management
- Additional options :
+ CO and Methane sensors for usage in underground mines
+ GPS receiver
- Calibration/Test :
+ Factory calibration in a Radon daughter product atmosphere with aerosol generator
+ Test sources Am-241 (Alpha) and Cs-137 (Beta); recommended are area sources with 25mm diameter and 185Bq nominal activity such as Eckert & Ziegler AMR02011/CDR02011 or similar
+ Flow rate check on top of the filter using adapter dome and low differential pressure air flow meter (p < 10mbar @3l/min)
- Accessories :
+ USB cable
+ Charger/power adapter
+ Harness for comfortable wearing