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Introduction to :First Level Personal Preparedness: Communication Devices :Early Warning Devices

Early Warning Devices, a subset of Communication Devices

The purpose of an Early Warning Devices is to signal danger and in some cases, the level of danger, to persons in the path of a harmful event.
These devices include: radiation detectors, earthquake alarms and dedicated band weather alerts.

Radiation Detectors .

Earthquake Alarms .

Weather Alerts .


Disclaimer- Please Read
Although we've made an effort to inform the consumer about the availability, human factors and usability of these special products, we make no claim for either their technical or contextual efficacy. As such, the reader assumes all responsibility for the selection, training, deployment and maintenance of these products for use in emergencies.

The key advantages of Early Warning Devices are:
Advance warning of danger| Broadcast independent| Localized danger alert

Radiation Detectors
NukeAlert   RadDetect ™ PRD 1250
Earthquake Alarms   QuakeAlarm  
 
Radiation Detectors
 

NukeAlert

NukeAlert $160.00
Sales Source: http://www.nukalert.com/

Specifications
• Detects Gamma & X-ray radiation: 20 keV to 2+ MeV
• Detection Range: 100 mR/hr to 5,000 R/hr
• Sensitivity: 100 mR/hr to 50 R/hr indicated in 10 ranges
• Proportional Increasing Chirp Rate:  50 R/hr to 5,000 R/hr
• Indication: Repeating groups of rapid countable chirps
• Operational indicator: faint "ticking" = operating OK.
• Alarm loudness: ~ 61 dBA (speaking volume)
• Durability: Functional after 6' drop or submersion to 6'
• Battery: Operational Life Expectancy @ room temp:
- Non-alarming (normal operation) - 10 to 15 years
- Alarming continuously at single chirp level - 3 years
- Alarming continuously at highest alarm level - 3 months
- See NEW Battery Replacement Program
• Detector: Patented CdS photo resistor coupled to a rare earth phosphor scintillator
• Housing: hermetically sealed, radiation transparent, abrasion resistant ABS plastic
• Accuracy: Within +/- 1 chirp
• Response Time: Dose rate dependent:
? ~3 - 4 min. @100mr/hr
? ~4 - 5 sec. @ R/hr ranges
• Accumulated dose chart on back
• EMP immunity: Meets MIL-STD-461D, RS105
• Over range survivability: Functional after 5K R/hr. for 2hr.
• Temperature Range: -20 C  to  +50 C
• Physical: 1.75"x1.25"x .75"H (LxWxH), Wt <1.0 oz.

Features
Meets the following DoD EMP immunity standards:
MIL-STD  461D  (Control of EM Interference)
MIL-STD  RS105 (EMF Transients)
• Tested & Verified by Naval Air Warfare Center
• Always "ON" 24/7, Includes long-life 10+ year battery
• Detection Range:  100 mR/hr to 5,000 R/hr,
• Metering:  100 mR/hr to 50 R/hr, in 10 calibrated ranges
• Proportional Increasing Chirp Rate:  50 R/hr to 5,000 R/hr
• Gamma and X-rays from 20 keV to above 2 MeV
• Sensitivity incl. higher emergency radiation levels
• Alarm "chirp" corresponds to chart on back of device
• Introduced before Health Physics Society - 1/03
• Performance verified by Nat'l Radiological Laboratory
• Each unit individually radiation accuracy tested
• Patented technology
• 10 Year Warranty
• Made in the U.S.A.

Description
The NukeAlert is one of a few key-fob sized early detection devices that are marketed to permit individuals to be forewarned of radiation exposure that may be of levels detrimental to safety. The supposed response to such early detection is evacuation as wellas mitigation strategies that include the use of NCBR suits, decontamination and the use of radiation blocking Potassium Iodide pills. The recomended use of the fob is via attachment to an ordinary keychain- carried in everyday manner.

Evaluation Results & Conclusions...

Ease of Use

Task performance optimization


RadDetect ™ PRD 1250

RadDetect $ 149.99
Sales Source: http://www.nukepills.com

Specifications
http://www.nukepills.com

Features
• Durable. Passed EMP immunity and exceeds the MIL-STD-461D specs. The RadDetect Personal Radiation Detector is tested with a Marx Bank Generator and Voltage Gradient Tests up to 145 KeV with total immunity. Housing constructed with water-resistant, high impact ABS.
• Advanced.  RadDetect™ vs Nukalert™ Comparison Chart Updated!
• Unique. Dual Mode Detection: Auto-alert with Directional Feature and Diagnostic Alert exposure-level analysis.
• Versatile.  Detects High Energy Gamma, X-ray and Beta radiation.
• Intelligent. Monitors automatically 24/7.
• Simple. Instantly reports (less than a second) with audible and visual alerts when radiation levels are rising and falling.
• Fast.  Repetitive monitoring alerts you to dangerous radiation in fractions of a second, not minutes like other keychain-style personal radiation detectors.
• Solid State - Replaces older CDS cell technology found in other keychain-style detectors (such as the Nukalert) with a high-grade photodiode /scintillator w/linear photodetector & direct conversion. This eliminates temperature sensitivity induced false-alarms and slow 3-5 minute low-level reaction time found in other keychain-style detectors (such as the Nukalert). This new technology adds the capability of detecting Beta radiation such as strontium-90 (possibly in a dirty bomb) and radioactive iodine (I-131) emitted from a nuclear reactor accident or fallout from a nuclear bomb.
• Real-world application.
Dirty Bomb - Detects Cesium-137, Iridium-192, Thallium, Cobalt-60, Strontium-90. The ONLY keychain-style personal radiation detector that detects Beta radiation, which includes Strontium-90, a grave concern for dirty bombs (see below).
Nuclear Reactor Accident or Nuclear Bomb Fallout - Detects both high energy Gamma and Beta radiation from released from a nuclear accident/attack. With the presence of I-131, emergency heath officials may call for the administration of potassium iodide.
• Wide alarm range - 75mR/hr to 2000R/hr. (Other keychain-style detectors (such as the Nukalert) detect only 100mR/hr to 50R/hr.)
• Affordable. Low retail cost compared to other commercially available units with less features.
• Aesthetically pleasing.  Small, rugged, lightweight, discrete.
• 1-year Warranty. 100% Parts and Labor warranty.

Description
The RadDetect is one of a few key-fob sized early detection devices that are marketed to permit individuals to be forewarned of radiation exposure that may be of levels detrimental to safety. The supposed response to such early detection is evacuation as wellas mitigation strategies that include the use of NCBR suits, decontamination and the use of radiation blocking Potassium Iodide pills. The recomended use of the fob is via attachment to an ordinary keychain- carried in everyday manner.

Evaluation Results & Conclusions...
We tested the low level detection functionality of the RadDetect using a dentist's X-Ray equipment. Indeed, the response was almost instant and the radiation level detected, was close to that delivered by the X-Ray equipment.
The battery life stated of 6 months was indeed very close to what we experienced. Unfortunately, on a subsequent trial, we also discovered that the test button was easily depressed by accident, causing the RadDetect battery to drain in a matter of 2 weeks.

Manufacturers comparison to NukeAlert...
http://www.nukepills.com/RadDetect-vs-NukAlert.htm

Ease of Use- The RadDetect was easy to use in that the instructions for reading the device are understandable. Testing the device only required a brief push of the test button.

Task performance optimization-
We felt that the RadDetect is ideal for individuals that are most likely to be exposed to radiation in the event of a disaster. Individuals such as first responders are thus more likely to have the wherewithal to perform regular battery replacements prior to the 6 month expiration dates for the batteries. As such, we are not as comfortable recommending this design to civilians that may not have the required discipline to perform the necessary battery replacements regularly. In addition, the RadDetect's battery, though easily replaced, may be drained quickly through sustained pressure on the monitor button. More than other aspects of the response sequence, early detection must occur completely passively, transparently and unfailingly. We therefore offer the RadDetect as an ideal device for professional first responders but not to civilians

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Earthquake Alarms
 

QuakeAlarm $
Sales Source:

Features

Description

Evaluation Results & Conclusions...

Ease of Use

Task performance optimization


 
 
 
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