RadAl™-1: Radiation Monitor and Alarm

cost-effective protection against radiological risk

Common Specifications:

Detectors Geiger-Müller tube(s), L= 230 mm, D = 20 mm (9" x 0.75")
Sensitivity 12 cps/µGy/h/tube = 12 cps/µGy/h/tube = 120 cps/mR/h/tube
Alarm Level Automatic, as low as 20 nGy/h (2 µR/h)
Response Time Automatic, from 1 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 1 - Key on/off          2 - Key calibrate
Outputs 3 Status LEDs:  green - ON   yellow - COUNT    red - ALARM
Buzzer (can be disabled): 80 dBA @ 30 cm (1 ft)
Relay, SPDT, 10 A, 380 Vac, 2500 W, 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 (with 100 mA fuse);
¤   115 Vac (nominal), 50 - 60 Hz (with 100 mA fuse)
¤   12 ± 3 Vdc
Power Consumption 1.5 W average, 3 W peak
Temperature Range Operation:  -25... 85  °C (-13... 185 °F)
Storage:    -40... 125 °C (-40... 257 °F)
Warranty One year all parts and labor
Applicable Standards FCC Part 15 (Class B); EN 50081-1, EN 50082-1 (CE label)

RadAl™-1 models (for interiors):

for interiors
Humidity Range 0... 95% RH, non-condensing
Housing Black Anodized Aluminum (other colors on demand)
Dimensions (WHD) 110 x 400 x 60 mm = 4.35 x 15.75 x 2.37 "
Weight Instrument 1.4 Kg = 3.0 LBS
Shipping:  2.0 Kg = 4.2 LBS
Protection IP54

Each RadAl™-1 unit is delivered with a 1.8 m (6 ft) power cord (Standard Central European or US, specify at order) and two expansion screws for wall mounting. A 6 mm (1/4") drill bit and a drilling machine may be required for installation.

RadAl™-1-WP models (for exteriors):

Humidity Range 0... 100% RH
Housing tan fiberglass reinforced polyester
Dimensions (WHD) 445 x 393 x 158 mm
  = 17.52 x 15.46 x 6.23"
Weight 8 Kg = 17 LBS
Shipping: 1
0 Kg = 21 LBS
Protection IP 67, NEMA 4, UL Listed

RadAl™-PAD Program and Display Unit:

Display Graphic, back-lit
Humidity Range 0... 95% RH, non-condensing
Housing Yellow impact resistant polyester
Dimensions (WHD) 4.53x7.87x3.66 inch
115x200x93 mm
Weight Instrument 0.5 Kg = 1.0 LBS
Shipping: 1.0 Kg = 2 LBS
Protection IP65

Specifications are subject to change without notice

Specifications are for models with one GM tube. Models with 4 GM tubes (RadAl™-1/4 and RadAl™-1-WP/4 have twice the sensitivity and speed.

Connections to relay and communication ports are by  terminals accessible through wall passages.
Computer programs can be provided to demonstrate and test co
mmunications.

A detailed report: "sensitivity tests using Am241 and Cs137 sources" is available documenting alarm response thresholds.


No toxic nor radioactive materials are used in th
ese instrument!

Click here for a discussion of the sensitivity of the RadAl™-1

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