This unit is designed for aggressive raptors (such as spotted owls) where a durable back-pack is required. It is designed to present a very low profile and has a very rugged antenna and anchoring system.
|Model||Weight||Standard Life||Lifespan range||Dimensions: L x W X H (mm)|
|RI-2A||8g||6 months||3-9 months||50 x 25 x 5|
|RI-2A||12g||12 months||9-18 months||50 x 25 x 7|
|RI-2A||17g||24 months||18-30 months||50 x 25 x 9|
Frequency Range: 138 to 235 MHz.
Transmitter: Crystal controlled two-stage design, pulsed by a CMOS multivibrator.
Pulse Width (standard): 24 milliseconds (ms). Available from 22-30ms.
Pulse Rate (standard): 40 pulses per minute (ppm). Available from 20-120ppm.
Power Output: Set to use available battery power over the required transmitter life.
Housing: The battery and transmitter are encapsulated in an inert waterproof epoxy.
Attachment: For backpack application, flat Teflon ribbon (or other suitable material) can be sewn to the transmitter through the holes in the transmitter.
Antenna: Stranded stainless steel cable covered with a black nylon coating. Two layers of shrinkable tubing reinforce the antenna at its base.
Activation: Removing an external magnet starts the transmitter. Replacing it stops the transmitter.
Mortality (suffix “M”): The available delay is 12 hours. The 12 hour delay circuit indicates its activation by increasing the pulse rate from a nominal ~42 ppm to ~75 ppm. After the mortality mode has been triggered, any motion resets the transmitter to the normal pulse rate. This option adds ~0.5g to the finished weight of each transmitter.
Activity (suffix “A”): Every motion event exceeding a preset range of angles generates one extra pulse between the normal pulses. This activity pulse is distinctively shorter (~12 ms) than the normal pulses. This option adds ~0.5g to the finished weight of each transmitter.
Temperature (suffix “T”): An increase or decrease in temperature results in a corresponding increase or decrease in pulse rate. At the standard settings, the pulse rate changes from ~15 ppm at 0°C to ~50 ppm at 40°C. Each transmitter is supplied with a plotted calibration curve. This option adds ~0.05g to the finished weight of each transmitter.
Position (suffix “P”): The pulse rate switches from ~24 ppm to ~50 ppm when the animal changes body position, pivoting the transmitter 10° or more from a preset orientation. This option adds ~0.5g to the finished weight of each transmitter.