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

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

These units are designed as intraperitoneal implantation in snakes and lizards. When fitted with a temperature sensor, the pulse rate is adjusted to accommodate the wide body temperature range of poikilotherms. For other applications the pulse rate can be set to measure narrower temperature ranges. These units can also be configured for use in waterfowl and mammals.

Frequency Range: 138 to 235 MHz.

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

Pulse Width & Rate: SB-2: Pulse width 20-22 ms, pulse rate nominal 0.67 p/s (40 p/m).
SI-2: Pulse width 22-24 ms, pulse rate nominal 0.7 p/s (42 p/m).
AI-2: 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-2	3.8g	5 months	3-6 months	14 x 9.5
SB-2	5.0g	10 months	6-12 months	19 x 9.5
SI-2	9g	12 months	6-18 months	33 x 11
SI-2	11g	18 months	12-24 months	40 x 11
SI-2	13g	24 months	12-30 months	50 x 11
AI-2	16g	24 months	12-30 months	38 x 15
AI-2	20g	30 months	18-36 months	43 x 15
AI-2	25g	36 months	24-42 months	45 x 17

Note: Because the larger (5.0g - 10 month) SB-2 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. A small groove is added to the unit to allow for suturing during implantation. To prevent tissue reactions, the case is coated with multiple layers of a biologically inert butyl rubber compound. For subcutaneous placement, asymmetrically tapered ends are added, increasing the length by 5mm at each end.

Antenna: Finely stranded stainless steel cable, covered with a clear Teflon coating. Clear silicone tubing reinforces the 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-2 ~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-2 only. 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.

SB-2, SI-2 & AI-2 TRANSMITTERS

SB-2 (5g size)

SI-2 transmitter

SI-2 (9g size)

AI-2 transmitter

AI-2 (16g size)

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