Sensors

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Wild
life

Sensors

Internal sensors

Animal positioning (GPS)

GPS positions are the core element of all our collars and most studies. According to the GPS schedule all positions are stored onboard in the collar memory. Depending on your configuration this data can be sent to you remotely (GSM / IRIDIUM / GLOBALSTAR), or downloaded on-site with VHF and UHF radio communication or later in the office via cable connection. The GPS schedule is highly flexible and can be programed to fit to the daily activity of the animal and to all seasonal requirements (e.g. migration, mating, hunting season). Depending on your configuration it can also be changed remotely. The data is managed by our free GPS PLUS X software.

More Information: Animal positioning (GPS)

GPS position chart
GPS position chart

Activity sensor

Activity data is another important tool in wildlife sciences. A acceleration sensor within the collar is used to measure the movement (forward-backward, left-right, up-down) of the animal which can be used to study behaviour patterns, rythyms and even to check on animals well-being. The sensor has been updated with the new collar generation offering many more options than the old GPS Plus sensor. It can store the raw data in contrast to the old generations which generated processed and averaged values only (storage limitations within the collar).

More Information:
Activity sensor (before 2015)
New Activity sensor (after 2015)

Activity sensor
Activity sensor

Mortality / Hibernation sensor

A simpler version of the activity sensor is able to create a mortality event if the collar has not been moved for a pre-defined time. This event is stored in the collar and can be sent to you via GSM or Iridium. Additionally, the collar can switch automatically to hibernation mode if the animal’s movement and activity schemes are low and will re-enter normal operation if the animal is moving again. GPS positioning and data transmission cease during hibernation mode to save battery power and prolong the collars operational lifetime.

Activity chart
Activity chart

Temperature

The temperature of the collar is stored with every GPS fix, every activity sample or, if no activity is measured, every 5 minutes as an estimate of ambient temperature and transferred to you with the GPS positions and activity data. This way you can control the operating temperature of the collar and monitor the animal’s reactions to changes in temperature. Temperature data can be downloaded from the collar via Link Manager orUHF/VHF Handheld Terminal.

Temperature chart

External Sensors

The VERTEX Plus collar is also able to monitor external sensors and send messages remotely about their status. These Sensors use UHF technology to provide data on birth, mortality, body temperature and interactions between different animals. You can download the data via Link Manager or UHF/VHF Handheld Terminal. It is also possible to receive sensor status messages via Iridium or GSM and even get a real time alert if your study animal gives birth or dies. The same feature (next to others) can also be used to change the GPS pattern of the collared specimen. Please check FAQ / Schedules for details on the intelligent collar programming.

To get a first impression of the External Sensors, have a look at the short video introduction:

Mortality Implant (MIT)

The MIT is designed to inform you immediately if your study animal has died. The Mortality Implant Transmitter is a stainless steel tube which can be placed either into the rumen or into the abdominal cavity of the animal. It contains a temperature sensor and also a highly sensitive acceleration sensor which is able to detect even the heartbeat of the animal. The MIT sends frequently status messages of the animal to the GPS VERTEX collar using UHF communication.

More Information: Mortality Implant

Mortality implant
Mortality implant

Vaginal Implant (VIT)

The Vaginal Implant is a UHF transmitter which provides data about birth events. The VIT is encapsulated in a small tube which can be inserted into the vagina of a pregnant ungulate. The VIT continuously measures body temperature and motion, and sends the data to the VERTEX Plus collar in regular intervals. In the event of birth, the VIT is pushed out of the mother’s body by the newborn and a birthing event will be recorded. It will also provide data when the mother leaves the vicinity of the VIT and the calving site. All data is stored in the collar and VERTEX Plus collars with Iridium or GSM communication can provide data about the birth events remotely.

More Information: Vaginal Implant

Vaginal implant
Vaginal implant

UHF ID Tags

For studying intra- and interspecies interactions, we offer small, light-weighted, energy-efficient, and inexpensive UHF-ID tags. These ID tags can be deployed to any kind of collar or they can be integrated in a VERTEX Plus collar. Each ID tag has its own ID number, and can be equipped with several sensors and a VHF beacon transmitter. Depending on the application different data is transmitted between the UHF ID tag and a VERTEX Plus Collar. The ID tag’s signal is received and recorded using the UHF data communication in a VERTEX Plus collar. The maximum distance is around 130 meters but the IDs signal output can be adjusted to the specific needs.

Separation Sensor Application

The Separation Sensor Application has been developed to study mother-offspring behaviour, but it can also be a useful tool for monitoring inter-group dynamics. With the Separation Sensor Application, the VERTEX Plus collar is able to monitor signals from up to eight UHF-ID tags. The VERTEX Plus collar listens to the UHF-ID tags in pre-defined intervals. If an ID tag signal has not been received for one hour, the VERTEX Plus collar stores a separation event and optionally sends a message via GSM or Iridium. The tag’s signal does not only contain the ID, but also the information if the tagged animal is dead or alive. This information (mortality event) is automatically sent to the collar, independent of the communication schedule.

Seperation Sensor Application
Separation Sensor Application

VECTRONIC Expandable Fawn Collar

The Expandable Fawn Collar has been designed for attaching a UHF-ID tag on a fawn. This collar is very light and made of elastic material which is folded in several layers. The layers are sewed together with cotton yarns, which allow the layers to unfold with the effect from wear, time and weather. The combination of elastic and folded material ensures a good fit for a growing neck of the fawn.

More Information: Separation Sensor

Expandable Fawn Collar
Expandable Fawn Collar

Proximity Sensor Application

The Proximity Sensor in the VERTEX Plus collar communicates with UHF ID tags of other animals. Any ID tag in an area of up to 130 m will be registered and its ID is stored in the collar with date, time and signal strength. Optionally, this information can be transmitted via GSM or IRIDIUM. The collar can also switch to an alternative GPS schedule during these encounters. This way you can monitor interaction between predator and prey, conspecifics or competitors. The detection range can be extended or reduced depending on your demands.

More Information: Proximity Sensor

Proximity sensor