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.
|Model||Weight||Standard Life||Lifespan range||Dimensions LxWxH (mm)|
|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|
Frequency Range: 138 to 235 MHz.
Transmitter: Crystal controlled two-stage design, pulsed by a multivibrator.
Pulse Width (standard): 20 milliseconds.
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 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.
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.
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 ~25 ppm at 0°C to ~40 ppm at 40°C. Each transmitter is supplied with a plotted calibration curve. This option adds ~0.05g to the finished weight of the transmitter.
Position (suffix “P”): The pulse rate switches from ~24 ppm in a vertical position to ~50 ppm in a horizontal position. This option adds ~0.5g to the finished weight of the transmitter.
Mouse of the Rising Sun