Holohil Systems Ltd. - SB-2F, SI-2F & AI-2F

Holohil Systems Ltd.
SB-2F, SI-2F & AI-2F

These units are designed to be mounted on the carapace of turtles.

Frequency Range: 138 to 235 MHz.

Transmitter: SB-2F: Crystal controlled two-stage design, pulsed by a multivibrator.
SI-2F & AI-2F: Crystal controlled two-stage design, pulsed by a CMOS multivibrator.

Pulse Width & Rate: SB-2F: Pulse width 20-23 ms, pulse rate nominal 0.67 p/s (40 p/m).
SI-2F: Pulse width 22-24 ms, pulse rate nominal 0.7 p/s (42 p/m).
AI-2F: Pulse width 25-30 ms, pulse rate nominal 0.7 p/s (42 p/m).

Specifications:

Model	Weight	Nominal Life	Lifespan range	Dimensions: L x Diameter (mm)
SB-2F	6g	10 months	6-12 months	19 x 9.5
SI-2F	12g	12 months	6-18 months	33 x 11
SI-2F	14g	18 months	12-24 months	40 x 11
SI-2F	16g	24 months	12-30 months	50 x 11
AI-2F	19g	24 months	12-30 months	40 x 15
AI-2F	23g	30 months	18-36 months	45 x 15
AI-2F	33g	36 months	24-60 months	46 x 17

Note: Since the SB-2F unit uses two batteries in parrallel, it must not be stored for more than 2 months prior to use.

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

Housing: The battery and transmitter are hermetically sealed in a brass case.

Attachment: Brass tabs are attached at the mid-point or at the ends for screw attachment to a turtle carapace. The transmitter is usually mounted above a back leg.

Antenna: Stranded stainless steel cable, covered with a black nylon coating. Additional layers of shrinkable tubing and/or a spring reinforce the antenna at its base.

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 (SB-2C ~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 ~0.05g to the finished weight of each transmitter.

Mortality (suffix "M"): AI-2F only. The available delays are 4 or 12 hours. Note: The 4 hour delay is only available in the 30g size. The 4 hour delay circuit indicates its activation by a double pulse. The 12 hour delay circuit indicates its activation by increasing the pulse rate 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.

SB-2F, SI-2F & AI-2F CONFIGURATIONS

Left: SB-2F unit
Right: SI-2F units (14g size)

AI-2F transmitter - end tabs

Left: AI-2F unit (30g size) with end tabs
RIght: AI-2F unit (30g size) with cross tabs

Pictures of the SB-2F, SI-2F and AI-2F on various species:

Map Turtle (20KB)

AI-2F transmitter bolted to the carapace of a map turtle (Graptemys geographica).
Photo: Yves Chagnon (1998).

SI-2F transmitter tied to the carapace of a spiny softshell turtle (Trionyx spiniferus).
Photo: Yves Chagnon (1998).

AI-2F transmitter bolted to the carapace of a wood turtle (Glyptemys insculpta).
Photo: Raymond Saumure (1999) www.woodturtle.com

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