GENEQ > Environment > Radiation Monitors

Radiation Monitor and Alarm
(wall mount)

FEATURES
  • Compact, rugged, economical
  • Easy installation, no maintenance
  • Self-calibration without radioactive sources
  • Sensitive to energies as low as 25 keV
  • RS-232 and RS-485 communication

APPLICATIONS
  • Stade borders and road check points
  • Airports, ports, railway and bus stations
  • Public, corporate and military buildings
  • Banks: safe deposit boxes and caveaux
  • Post offices
  • Hospitals (radiotherapy units) and universities
  • Smelters and waste dumps
  • Stockrooms and storage facilities
  • Waste incineration and disposal plants
  • Food processing plants, water supply tanks
  • Weather stations
  • Radiological protection in areas subject to terrorist threat

The RadAl-1 wall mount radiation monitor and alarm was specifically designed to identify radioactive substances, either lost or misappropriated with criminal intent. It can thus help protect from the consequences of illegal trafficking in radioactive sources and from the radiological risk caused by the widespread presence of radioactive substances in the environment.

The instrument detects the presence of harmful radiation using one to four large Geiger detectors: the alarm is triggered when the radiation level is statistically higher than the local background.

Each Geiger detector in the RadAl-1 has 80 times the volume of the detectors used in typical hand-held instruments, ensuring fast response (<6sec) and high sensitivity (the alarm threshold is typically 20 nGy/h, depending on background).

Multiple outputs (LEDs, buzzer, relay, RS-232 and RS-485 communications) and power supply possibilities (230/115 Vac, 12 Vdc) allow easy integration in any areas monitoring and security systems.

SPECIFICATIONS
Detectors Geiger-Müller tube(s), L=230mm x Ø = 20mm (9" x 0.8")
Alarm level Automatic, as low as 20 nGy/h (2µR/h)
Response time Automatic, from < 6 seconds to 10 minutes
Alarm modes Latching and non-latching, field selectable
Calibration Automatic, uses ambient background
Radiation detected X-Ray and Gamma >25 keV; peak sensitivity at 60 keV
Inputs
  • key ON/OFF
  • key CALIBRATE
Outputs (Status LEDs)
  • green: ON
  • yellow: COUNT
  • red: ALARM
Buzzer (can be disabled) 80 dBA @ 30 cm (70 dBA @ 1m)
Relay SPDT, 10A, 380 Vac, 2500W, non-inductive load
Communications RS-232-C or RS-485 1/4 load, field selectable
Protocol 9600 baud, 8 bits, No parity, 1 stop bit
Power supply (field selectable)
  • 230 Vac (nominal), 50/60 Hz (fused 100 mA)
  • 115 Vac (nominal), 50/60 Hz (fused 100 mA)
  • 12 ± 3 Vdc
Power consumption 1.5W average, 3W peak
Temperature range
  • Operation: 0... 70°C (-13... 158°F) (-25 ...85°C on demand);
  • Storage: -25... 85°C (-40... 185°°F)
Humidity range 0... 95% RH, non-condensing
Housing Black anodised aluminium (other colours on demand)
Dimensions (HWD) 110 x 400 x 60 mm (4.35 x 15.75 x 2.37")
Weight Instrument: 1400g (3.0 pounds); Shipping: 2000g (4.2 pounds)
Protection IP54
Applicable standards FCC Part 15 (class B); EN 50081-1, 50082-1
Warranty One year parts and labour

CAT. NO. DESCRIPTION
RADAI-1/1 Radiation monitor & alarm with 1 GM tube
RADAI-1/2 Radiation monitor & alarm with 2 GM tubes
RADAI-1/4 Radiation monitor & alarm with 4 GM tubes

Notes: The specifications above are for model RADAl-1/1. The RadAl-1/4 model has four G-M tubes, and consequently has four times the sensitivity and -- in presence of source of equal intensity -- is twice as fast as the RadAl-1/1.
Each RadAl is delivered with a 1.8m (6ft) power cord (Standard Central European plug) and two expansion screws for wall mounting. A 6mm (1/4") drill bit and a drilling machine may be required for installation.
Connections to relay and communication ports are by ire terminals accessible through passages on the bottom wall.
Computer programs can be provided to demonstrate and test communications. A detailed report "sensitivity tests using Am241 and Cs137 sources" is available documenting alarm response threshold.
IP67 waterproof, ruggedized version (RadAl-1-WP/X), remote command box, shield, and test cources also available. No toxic or radioactive substances are used in this instrument.