UV TRON is a class 1 ultraviolet detector that makes use of the
photoelectric effect of metal and the gas multiplication effect. It
has a narrow spectral sensitivity of 185 nm to 260 nm, being
completely insensitive to visible light. Unlike semiconductor
detectors, it does not require optical visible-cut filters, thus
making it easy to use. In spite of its small size, it has wide
angular sensitivity (directivity) and can reliably and quickly
detect weak ultraviolet radiations emitted from flame due to use the
metal plate cathode (eq. it can detect the flame of a cigarette
lighter at a distance of 5 meters). Hamamatsu UV TRON is well suited
for use in flame detectors and fire alarms, and also in detection of
invisible discharge phenomena such as corona discharge of
high-voltage transmission lines.
Device Specifications :
Spectral Response (Short)
185 nm
Spectral Response (Long)
260 nm
Window Material
UV glass
Weight
Approx. 1.5 g
Discharge Starting Voltage (with UV radiation) (Max.)
280 Vdc
Recommended Operating Voltage
325 +/-25 Vdc
Background (Max.) *a
10 min-1
Sensitivity (Typ.) *b
5000 min-1
Maximum Ratings Supply Voltage
400 Vdc
Maximum Ratings Peak Current *c
30 mA
Maximum Ratings Average Discharge Current *d
1 mA
Operating Temperature
-20 to+60 deg. C
The Smoky
Bomb Threat
The
exotic murder-by-polonium of the former K.G.B. spy Alexander
Litvinenko has embroiled Russia, Britain and Germany in a diplomatic
scuffle and a hunt for more traces of the lethal substance. But it
also throws into question most of the previous analyses of 'ditry
bombs' terrorist attacks using radioactive isotopes wrapped in
explosives (or using other dispersion techniques) to spread
radioactive material in crowded areas (more..)
(detector)
How To Find
Easily A Sensor
Simple
question, difficult answer. In DTLink, we resolved this problem with
the Configurable Location Buzzer. Once you a close to the device you
can send it an SMS message with the duration you want the buzzer to
beep. Simple question, simple answer.
Comparison
To RFID Systems
Radio frequency identification, or
RFID, technology, employs a different strategy for communication. In the RFID model, a unique identifier is stored on a device (called a transponder or a tag) containing a tiny processor attached to an antenna. When an RFID tag is within reasonable proximity to an RFID reader, which is a device that emits a signal activating the tag, the unique identifier is captured and can be communicated to other computers within an application system. The kinds of applications suitable to an RFID system are those that need to track objects as they move from one location to another. The difference between a mote and an RFID tag is that a
mote has two way communications and it's part of a network. The motes can talk to each other.
A RFID tag is simply a device that transmits
information. This is an essential difference when
constructing a network of sensors and expanding to features that
require a two-way communication.
Barometric
Pressure (Bosch)
The device is a high-precision, ultra-power barometric pressure
sensor for use in advanced mobile applications. With an absolute
accuracy of 2.5hPa (which is equivalent to an altitude change of
merely 0.25m) the device offers superior performance.. At the same
time the device features ultra low power consumption of down to 3mA.
Earthquake
Sensors Is A Reality
Radon, an inert gas, is produced in the decay series of U-238 (1). The total uranium content of the earth crust is about 3-4 ppm (parts per million) which is significant in terms of total mass and its radiological contribution to our atmosphere.
An important application of radon measurements is in earthquake prediction (3-6). The earthquakes have always been a source of terror and destruction for the
mankind. About 3.5 million deaths are known to have occurred in 38 major earthquakes from 342-1976 A.D. The earthquake prediction has always been a dream and now it seems to be at the verge of reality as a result of
advances made in the science of radon measurement.. (more..)
(radons detector)
Embedded
Wireless Fire Detection
Two-Level Alarm Support
Unlike
competitor systems, DTLink WDS, based on DTSensors, provides two-level alarm system. From
both the gateway device installed at the field and the Control
Center where the GIS software runs. This is to prevent an eventual
unavailability of the Control Center or a communication problem
between the two systems. (more..)
Self-Organizing Network Of Sensors
The
concept of self-organizing sensor networks deployed in large areas
can be implemented in many real world applications, since the
required technology of electronics now exists and is well-proven. In
this case, DTLink WDS deploys a self-organizing fire-sensor network
over forest areas. Each sensor employs multiple sensors, a wireless
communication unit and a microprocessor. In user-defined time
intervals, sensors transmit a status signal to the network which is
then carried via neighboring sensors to local router (GSM, LAN,
Wireless LAN), which in turn broadcast the entire network status to
the
DTMaps application. (more..)
Mote Module Comparison Table
Energy
consumption is a critical parameter of a sensor node. The comparison
table shows the current consumption for Mica2, Telos, EyesIFX,
and TinyNode. The MCU related consumptions of the TinyNode,
EyesIFX, and Telos nodes are identical since they use the same chip.
TinyNode has radio consumptions comparable to the Mica2, while
offering significantly higher range and data rates. Telos also has
comparable radio consumption, but the CC2420 offers a higher bit rate
and faster radio wake-up. The tradeoff to this lower con- sumption is
a reduced communication rang. (more..)
Infrared Surface Temperature
Measurement Range
-33~220°C -27~428°F
Operating Range
-10~50°C 14~122°F
Accuracy
+/-2%, 2°C
Accuracy,#AC2 Tobj=15-35,Tamb=25
+/-0.6°C
Resolution
1/16°C
Response Time (90%)
1 sec
D:S
1:1
Rain Collector
Designed to meet the guidelines of the World
Meteorological Organization, our self-emptying tipping-bucket design
is exceptionally accurate. Used to display daily and accumulated
rainfall on weather stations (plus rate of rainfall on GroWeather,
Energy EnviroMonitor, and Health EnviroMonitor). Comes with 40' (12
m) standard cable.
DTMaps.com
Interface
Easy to install and deploy, DTMaps will allow the
online display of a fire detection zone based on Google maps and
unique data presentation and graphing capabilities. Fire Detectors
will start sending data to DTMaps and alert messages
immediately after installation. DTMaps interface will run both on
PCs and smartphone devices.
Anemometer
The Anemometer includes both wind speed and wind
direction sensors. Rugged components stand up to hurricane-force
winds, yet are sensitive to a light breeze. Includes sealed
stainless-steel bearings for long life. The range and accuracy
specifications of this unit have been verified in wind-tunnel tests
(information available upon request). A model 7911 Anemometer
reported wind speeds of 175 miles per hour before its tower
collapsed during hurricane Andrew, 1992. Digital filtering, with
time constant as specified below, is applied to wind direction
measurements. In areas where icing of the anemometer is a problem,
use Anemometer Drip Rings to deflect water from the joint between
moving parts.
Soil Moisture
The large sphere of influence meets the needs of
those customers who would like to measure the volumetric water
content of a large soil sample volume. The 10HS obtains volumetric
water content by measuring the dielectric constant of the media
through the utilization of capacitance/frequency domain technology.
In addition, the soil moisture sensors incorporate a high frequency
oscillation, which allows the sensor to accurately measure soil
moisture in any soil or soilless media with minimal salinity and
textural effects. ect water from the joint between moving parts.
DTMaps
Parking
Did You Ever Imagine.... using your mobile
phone to display available parking places? This is now possible with DTMaps-Parking, a parking place location system especially designed for the
mobile user and mobile devices of this new era. The combination of wireless
communication, global map technology, a new generation of parking sensors and advanced online payment systems design a new
environment that facilitates parking place location and contributes in environment preservation by
eliminating unnecessary traffic and pollution.
Parking
places are immediately show on the DTMaps interface, a Web-based
application designed for the desktop and the mobile devices. For the
first time, car drivers get exact parking availability information
and avoid driving in circles and produce useless pollution.
Wireless
Parking Studs
Wireless devices installed under the vehicle on the parking place that integrates a magnetic field sensor and the ultra-low power TinyNode 584 (mote) that communicates the vehicle presence to the wireless parking gateway device. The wireless parking studs are provided in two versions: the embedded version that installs into the bitumen and the regular version that
installs on the bitumen. The wireless parking studs are especially designed for an outdoor operation and will deliver services for more than 5 years using an AA battery. The network technology used in the DTMaps
Parking project, provides innovative solutions to some inherent problems like: energy efficiency, topology control and routing, and medium access control, to mention but a few. A technology for years reserved to academic searchers is now available to public applications.
Wireless
Parking Gateway
Wireless
device that groups a large number of wireless parking studs and
ensures the communication between the devices and the DTMaps
application. Whenever a vehicle occupies a parking place, the local
device will pass the information to neighbor devices which finally
reaches the wireless parking gateway. The device will connect to a
public network: GSM, GPRS, 3G, EDGE or any other public Wi-Fi and
will send the information to the DTMaps application.
Wireless
Parking Easy To Install
DTMaps
Parking has some unique install features that will make the system implementation a snap. Once a wireless parking stud is installed on the road, the installer will be able to immediately insert into the DTMaps interface and start getting information. No special devices are necessary. A mobile phone with access to the Internet is all that you will need.
DTMaps
Parking For Individuals
Did you know that while you are away from home other car drivers are ready to pay for your parking place? Why ignore such an easy revenue, when you can insert your parking place to DTMaps-Parking and have your Paypal account receive your payments directly. Doing this, you help other users find easily a parking place close to their destination avoiding driving in cycles to find a parking space. You will have the possibility to define clearly the opening hours of you parking place(s) and have it free again when you are back home !
DTMaps
Parking For Professionals
Every car driver has seen those parking info panels at the entries of the city redirecting users and providing useful information on parking provisioning. This was an excellent idea back in the 70’s, when communication devices and information was still visual and massive in the way that should approach the car drivers. In addition, by that time, our concerns about visual architectural pollution, where inexistent. Today there is an additional way to redirect your parking users without making massive investments in info panels. DTMaps ! Provide the same information individually !!
The
exotic murder-by-polonium of the former K.G.B. spy Alexander
Litvinenko has embroiled Russia, Britain and Germany in a diplomatic
scuffle and a hunt for more traces of the lethal substance. But it
also throws into question most of the previous analyses of 'ditry
bombs' terrorist attacks using radioactive isotopes wrapped in
explosives (or using other dispersion techniques) to spread
radioactive material in crowded areas 
Simple
question, difficult answer. In DTLink, we resolved this problem with
the Configurable Location Buzzer. Once you a close to the device you
can send it an SMS message with the duration you want the buzzer to
beep. Simple question, simple answer.
Radio frequency identification, or
RFID, technology, employs a different strategy for communication. In the RFID model, a unique identifier is stored on a device (called a transponder or a tag) containing a tiny processor attached to an antenna. When an RFID tag is within reasonable proximity to an RFID reader, which is a device that emits a signal activating the tag, the unique identifier is captured and can be communicated to other computers within an application system. The kinds of applications suitable to an RFID system are those that need to track objects as they move from one location to another. The difference between a mote and an RFID tag is that a
mote has two way communications and it's part of a network. The motes can talk to each other.
A RFID tag is simply a device that transmits
information. This is an essential difference when
constructing a network of sensors and expanding to features that
require a two-way communication.
Radon, an inert gas, is produced in the decay series of U-238 (1). The total uranium content of the earth crust is about 3-4 ppm (parts per million) which is significant in terms of total mass and its radiological contribution to our atmosphere.
An important application of radon measurements is in earthquake prediction (3-6). The earthquakes have always been a source of terror and destruction for the
mankind. About 3.5 million deaths are known to have occurred in 38 major earthquakes from 342-1976 A.D. The earthquake prediction has always been a dream and now it seems to be at the verge of reality as a result of
advances made in the science of radon measurement.. 
Unlike
competitor systems, DTLink WDS, based on DTSensors, provides two-level alarm system. From
both the gateway device installed at the field and the Control
Center where the GIS software runs. This is to prevent an eventual
unavailability of the Control Center or a communication problem
between the two systems. (
The
concept of self-organizing sensor networks deployed in large areas
can be implemented in many real world applications, since the
required technology of electronics now exists and is well-proven. In
this case, DTLink WDS deploys a self-organizing fire-sensor network
over forest areas. Each sensor employs multiple sensors, a wireless
communication unit and a microprocessor. In user-defined time
intervals, sensors transmit a status signal to the network which is
then carried via neighboring sensors to local router (GSM, LAN,
Wireless LAN), which in turn broadcast the entire network status to
the
DTMaps application. (
Energy
consumption is a critical parameter of a sensor node. The comparison
table shows the current consumption for Mica2, Telos, EyesIFX,
and TinyNode. The MCU related consumptions of the TinyNode,
EyesIFX, and Telos nodes are identical since they use the same chip.
TinyNode has radio consumptions comparable to the Mica2, while
offering significantly higher range and data rates. Telos also has
comparable radio consumption, but the CC2420 offers a higher bit rate
and faster radio wake-up. The tradeoff to this lower con- sumption is
a reduced communication rang. 
The Anemometer includes both wind speed and wind
direction sensors. Rugged components stand up to hurricane-force
winds, yet are sensitive to a light breeze. Includes sealed
stainless-steel bearings for long life. The range and accuracy
specifications of this unit have been verified in wind-tunnel tests
(information available upon request). A model 7911 Anemometer
reported wind speeds of 175 miles per hour before its tower
collapsed during hurricane Andrew, 1992. Digital filtering, with
time constant as specified below, is applied to wind direction
measurements. In areas where icing of the anemometer is a problem,
use Anemometer Drip Rings to deflect water from the joint between
moving parts.
The large sphere of influence meets the needs of
those customers who would like to measure the volumetric water
content of a large soil sample volume. The 10HS obtains volumetric
water content by measuring the dielectric constant of the media
through the utilization of capacitance/frequency domain technology.
In addition, the soil moisture sensors incorporate a high frequency
oscillation, which allows the sensor to accurately measure soil
moisture in any soil or soilless media with minimal salinity and
textural effects. ect water from the joint between moving parts.
Did You Ever Imagine.... using your mobile
phone to display available parking places? This is now possible with DTMaps-Parking, a parking place location system especially designed for the
mobile user and mobile devices of this new era. The combination of wireless
communication, global map technology, a new generation of parking sensors and advanced online payment systems design a new
environment that facilitates parking place location and contributes in environment preservation by
eliminating unnecessary traffic and pollution.
Parking
places are immediately show on the DTMaps interface, a Web-based
application designed for the desktop and the mobile devices. For the
first time, car drivers get exact parking availability information
and avoid driving in circles and produce useless pollution.
Wireless devices installed under the vehicle on the parking place that integrates a magnetic field sensor and the ultra-low power TinyNode 584 (mote) that communicates the vehicle presence to the wireless parking gateway device. The wireless parking studs are provided in two versions: the embedded version that installs into the bitumen and the regular version that
installs on the bitumen. The wireless parking studs are especially designed for an outdoor operation and will deliver services for more than 5 years using an AA battery. The network technology used in the DTMaps
Parking project, provides innovative solutions to some inherent problems like: energy efficiency, topology control and routing, and medium access control, to mention but a few. A technology for years reserved to academic searchers is now available to public applications.
Wireless
device that groups a large number of wireless parking studs and
ensures the communication between the devices and the DTMaps
application. Whenever a vehicle occupies a parking place, the local
device will pass the information to neighbor devices which finally
reaches the wireless parking gateway. The device will connect to a
public network: GSM, GPRS, 3G, EDGE or any other public Wi-Fi and
will send the information to the DTMaps application.
DTMaps
Parking has some unique install features that will make the system implementation a snap. Once a wireless parking stud is installed on the road, the installer will be able to immediately insert into the DTMaps interface and start getting information. No special devices are necessary. A mobile phone with access to the Internet is all that you will need.
Did you know that while you are away from home other car drivers are ready to pay for your parking place? Why ignore such an easy revenue, when you can insert your parking place to DTMaps-Parking and have your Paypal account receive your payments directly. Doing this, you help other users find easily a parking place close to their destination avoiding driving in cycles to find a parking space. You will have the possibility to define clearly the opening hours of you parking place(s) and have it free again when you are back home !
Every car driver has seen those parking info panels at the entries of the city redirecting users and providing useful information on parking provisioning. This was an excellent idea back in the 70’s, when communication devices and information was still visual and massive in the way that should approach the car drivers. In addition, by that time, our concerns about visual architectural pollution, where inexistent. Today there is an additional way to redirect your parking users without making massive investments in info panels. DTMaps ! Provide the same information individually !!
