Holohil Systems Ltd.

Holohil Systems Ltd.
RI-2D

These units are designed as collar mounts for gallinaceous birds from quail to capercaillie. They can also be fitted to small mammals such as squirrels, rabbits and large fruit bats.

Frequency Range: 138 to 235 MHz.

Transmitter: Crystal controlled two-stage design, pulsed by a CMOS multivibrator.

Pulse Width & Rate: 20 to 24 ms, nominal 0.6p/s (36p/m).

Specifications:

Model	Weight	Nominal Life	Lifespan range	Dimensions LxWxH (mm)
RI-2D	7g	6 months	3-6 months	15 x 16 x 12
RI-2D	7.5g	12 months	6-18 months	23 x 14 x 11
RI-2D	9g	18 months	12-18 months	30 x 14 x 11
RI-2D	11g	24 months	12-24 months	40 x 14 x 11
RI-2D	12g	24 months	12-30 months	29 x 19 x 15
RI-2D	15g	30 months	18-36 months	34 x 19 x 15
RI-2D	22g	36 months	24-60 months	37 x 16 x 17

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: A number of mounting options are available, such as an elastic or Dacron line neckloop, tubes for the passage of harness material, or a wire loop for attachment to a necklace. See diagrams below.

Antenna: Stranded stainless steel cable covered with a black nylon coating.

Activation: Removing an external magnet starts the transmitter. Replacing it stops the transmitter.

OPTIONS
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 p/m at 0°C to ~50 p/m at 40°C. Each transmitter is supplied with a plotted calibration curve. This option adds ~0.05g to the finished weight of each transmitter.

Mortality (suffix "M"): After a nominal delay of 12 hours the pulse rate increases from a nominal ~42 p/m to ~75 p/m. 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.

EXAMPLES OF RI-2D CONFIGURATIONS

Left: RI-2D (7.5g) with wire collar and Tygon tubing forming collar.
Right: RI-2D (12g) with Dacron and heat shrinkable tubing forming collar.

When used on bats, the transmitter is placed on the back of the neck and the antenna emerges from the center of the transmitter and lies down the back. A small amount of glue under the transmitter prevents it from rotating on the neck

Diagrams represent examples of configurations used by various researchers. Battery size will vary depending on lifespan required. Antennas may be longer.

Pictures of the RI-2D on various species:

Big Cypress fox squirrel (95KB)

RI-2D transmitter attached to a Big Cypress fox squirrel (Sciurus niger avicennia).
Photo: Ralph Arwood (2008)

RI-2D transmitter attached with a bead chain collar to a golden lion tamarin (Leontopithecus rosalia).
Photo: James Dietz (2006)

RI-2D transmitter attached with a collar to a fruit bat.
Photo: Suzanne Nelson (2001)

RI-2D transmitter attached with a collar to a white-tailed ptarmigan (Lagopus leucurus).
Photo: Steve Ogle (1997).

RI-2D transmitter attached with a collar to a fruit bat.
Photo: Suzanne Nelson (2001).

RI-2D transmitter attached with a collar to a fruit bat (Pteropus mariannus).
Photo: Dustin Janeke (2004).

Holohil Systems Ltd., 112 John Cavanaugh Drive, Carp, Ontario, Canada K0A 1L0
Tel: 613-839-0676 Fax: 613-839-0675 E-mail: info@holohil.com