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NORM monitor-IS – EX-proof

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  • EX-proof (zones 0, 1 and 2) – no need for specific hot work permit. ATEX
  • Dual detectors, both scintillation and GM-tube
  • NORM Monitor-IS (formerly T201) is rugged and waterproof
  • CPS or Bq/cm², also for NORM isotopes
  • Peak measurement function, for difficult access areas.
  • Detachable radiation probe, 1,5 m
  • Displays calibration due date.
  • Backlight, audio and adjustable alarm threshold

The NORM Monitor-IS (formerly T201) is a ATEX approved instrument with two probe options, Geiger Müller (GM) and scintillator. This enables users to monitor NORM in all conditions. The instrument comes complete with a practical and secure carrying holster.

The scintillation probe brings new benefits, robust and suitable for use in challenging conditions. The ability to undertake surveys of external walls for internal deposits of NORM and the ability to measure NORM in low diameter tubular internals (360 degree response). The Geiger Müller probe provides the traditional benefits of alpha and beta measurement as well as high sensitivity to lead (Pb-210).

The NORM Monitor-IS is available in 3 versions

  • Geiger Müller probe only
  • Scintillation probe only
  • Geiger Müller probe + Scintillation probe

Data sheet


Stefan Mårtensson


Technical specification

Radiation Detected : Alpha, Beta and Gamma
Sensor : Single Halogen Geiger Muller Tube.
Case material Static dissipative nylon body with ABS window. Thewindow is protected with a static dissipative additive
Variation with Temp° : Less than ±5% over temperature
range -10ºC to +40°C
Humidity Range : 0 → 95%
Protection class: Boby IP65, Detector IP34
Battery : Alkaline Manganese MN1604 or MX1604
Variation with Battery Voltage : Less than 2%
Battery Life : 100 hours typically with background radiation
Low Battery Indication : On 4 hours available life left
Over-range Response: Analogue display / digital bargraph will read full scale
                                 Digital display – at over 4000 cps the display shows
                                 Digital display – 0UEr (over)
Certification : Intrinsically Safe EEx ia IIB T4 (-20°c ≤ Ta ≤ + 40°c).
                    Equipment category II 1 G
                    Suitable for Hazardous Area zones 0, 1 and 2.
Standard compliance  The monitor meets the EU directives 89/336/EEC Electromagnetic Compatibility Directive (including amendments) and  94/9/EC ATEX Directive
Weight : 1 kg

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