ADU-4 Alert Display Unit Specifications
Sensor
Health Indication
A 2mm green LED indicates sensor health by blinking with each update
received
from the sensor.
Audible Alert
1 kHz audible alert conveys alert urgency by a sequence of notes played in a 4/4 musical tempo. Each note correstponds to a level of radiation intensity measured by the 4 thresholds of the RDU-18 Sensor.Alert Lamp
A 22mm dia. LED lights in unison with the audible alert notes.Radiation Hazard Indicators
Each RDU-18 radiation threshold is indicated with a 5mm LED on the Alert Display. From left to right the LEDs indicate:| Indicator Color |
Hazard Level |
| Yellow |
Indicates the presence of unusual radiation above the statistical(1x10-6) false alarm threshold for local background. |
| Orange |
Low Radiation Hazard. Long term exposure, on the order of days, will exceed regulatory limits for the public. |
| Amber |
Moderate Radiation Hazard. Short-term exposure, on the order of hours, will exceed regulatory limits for the public. |
| Red |
High Radiation Hazard. Immediate action required to protect public safety. |
Alarm Cancel Button
A momentary contact pushbutton is provided on the front panel to silence the Audible Alert and cancel Alert Lamp. These alarms are cancelled for the period of one minute. However, If the level of radiation increases above the next higher threshold, then the lamp and audible alarms will be reactivated.Housing
ABS Plastic
3.5 x 1.75 x 0.63 inches
Operating Temperature
-20 to +70 C
Protected by US Patent #7,327,270, other patents pending.
Product in development, specifications may change without notice.