Holohil Systems Ltd. - BD-2NC/BD-2C/PD-2C

Holohil Systems Ltd.
BD-2NC, BD-2C & PD-2C

These collar transmitters with whip antennas are designed for small mammals from mice and voles to woodrats and squirrels. Collars can also be configured for birds and large bats.

Frequency Range: BD-2C & PD-2C: 138 to 235 MHz. BD-2NC: 148-151, 164, 165, 172 & 173MHz only.

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

Pulse Width & Rate: Pulse width 20 ms ą 10%, pulse rate nominal 0.67 p/s (40 p/m).

Specifications:

Model	Weight	Nominal Life	Lifespan range	Dimensions LxWxH (mm)
BD-2NC	0.60g	21 days	17-30 days	11 x 6 x 4.5
BD-2C	0.80g	21 days	17-30 days	11 x 7 x 6
BD-2C	0.95g	28 days	21-35 days	11 x 7 x 6
BD-2C	1.1g	42 days	28-50 days	13 x 7 x 6
BD-2C	1.4g	56 days	43-74 days	14 x 8 x 6
BD-2C	1.6g	9 weeks	7-11 weeks	15 x 8 x 6.5
BD-2C	1.8g	11 weeks	9-16 weeks	16 x 10 x 6
BD-2C	2.0g	14 weeks	10-20 weeks	15 x 8 x 8
PD-2C	2.7g	3 months	3-4 months	21 x 12 x 7
PD-2C	3.4g	4 months	4-6 months	21 x 12 x 8
PD-2C	4.0g	6 months	5-9 months	21 x 12 x 9

Power Output: Set to use available battery power over the required transmitter life.

Housing: The transmitter and battery are encapsulated in multiple layers of biologically inert waterproof epoxies, to resist damage from abrasion and chewing. Battery placement determines shape. The unit is attached to a collar formed by the antenna or a separate wire collar or elastic. In the antenna or separate wire configuration, a TYGON sleeve covers the wire to prevent abrasion on the animal's neck. In the elastic configuration, layers of heat shrinkable tubing cover the elastic collar to prevent abrasion. See diagrams below.

Antenna: A stranded stainless steel wire covered with a black nylon coating. The antenna may also serve as the collar on some models.

Activation: Removing an external magnet starts the transmitter. Replacing the magnet 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 ~30 p/m at 0°C to ~50 p/m at 40°C. Each transmitter is supplied with a plotted calibration curve. This option adds ~0.05 g to the finished weight of the transmitter.

Position (suffix "P"): The pulse rate switches from ~24 p/m in a vertical position to ~50 p/m in a horizontal position. This option adds ~0.5g to the finished weight of the transmitter.

EXAMPLES OF BD-2C and PD-2C CONFIGURATIONS

Several collar configurations are possible. On smaller models, usually the antenna is passed through a tube along the length of the transmitter, thus serving as the collar. This minimizes the weight and reduces the length of antenna exposed to possible damage. Larger models can have either this configuration or a separate replaceable wire collar. The collar loop is adjusted to fit the animal, then secured with a brass crimp (supplied). Flexible Tygon tubing protects the animal's neck from abrasion. For the recommended method of attachment please see: Attachment Methods for BD-2C/PD-2C.

Left: BD-2C (2.0g) with antenna and Tygon tubing forming collar.
Center: PD-2C (4.0g) with elastic and heat shrinkable tubing forming collar.
Right: PD-2C (4.0g) with separate collar wire and Tygon tubing forming collar.

BD-2C bat transmitter

Above: 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.

Pictures
This link will take you to a page containing pictures of these transmitters on various species.

MISC. ANIMALS

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