Highlights and functions

  • Si-CAM detector unit 600 mm² for simultaneous separate alpha/beta measurement on a flat round dusting surface of 600 mm².
  • Direct measurement of artificial alpha/beta radioactivity using Berthold Radon Compensation method.
  • Optional gamma compensation detector with same measurement geometry as alpha/beta detector within the same shielding.
  • Fixed filter operation with simple filter change.

  • Transportable monitor with small footprint.
  • Data logger Mini PC with 7” color touch panel, intelligent Digital In / Out module.
  • Low-noise and low-maintenance external pump unit, air flow rate of approx. 3 m³/h.
  • Optional other external pump unit up to 4 m³/h air flow rate.
  • Detection of insufficient air flow rate of the pump.
  • Detection of pump error, e.g. pump failure.

MEASUREMENT WITH REAL-TIME MONITORING

Precise and simultaneously separated alpha/beta measurements

The transportable monitor consists of the following components:

  • Dusting unit: Direct measurement of radioactive alpha/beta particles using a Si-CAM detector.
  • Alpha/beta detector: Measures directly above the dusting surface to ensure real-time monitoring.
  • Detector unit: Made of stainless steel with degree of protection IP40, includes the dust extraction unit, fixed filter and quick filter changing device. Optional use of a screen detector (Si-CAM).
  • External pump unit: The system is quiet and vibration-free. It has the advantage that it is maintenance-free and has a long service life. The nominal flow rate is approx. 3 m³/h with a maximum noise level of 60 dB(A) at a distance of 1m.

Failure message if:

  • the flow rate is too low or
  • the pump is switched off.

Calculations

Calculation of the characteristic values according to DIN EN ISO 11929-1.

Continuous monitoring of the functionality

The monitor is equipped with self-monitoring functions that continuously monitor functionality and alarm status:

  • Pre-alarm threshold alpha or beta: If the alpha or beta pre-alarm threshold, defined by the user, is exceeded, an alarm message is generated.
  • Alarm threshold alpha or beta: If an alpha or beta alarm threshold is defined by the user, an alarm message is generated, as soon as this threshold is exceeded. Alarms can be set on activity concentrations, emission rates and integral values (Bq/m³ - Bq/h - Bq per day, week, month).

  • Detector failure threshold alpha and beta (and gamma if installed): If the count rate falls below a preset value, an error message (detector failure) is generated.
  • Lamp test: If the „Lamp test‘‘ switch is pressed, a digital input in the electronics is closed, which in turn triggers and activates all output relays.