The Irbis System
The Irbis System monitors VHF transmitters and makes an alarm when the state of a transmitter changes. The Irbis System is designed for monitoring of trapsite transmitters such as Telonics TBT-500. It makes an alarm when an animal is trapped. This alarm occurs within a few minutes from capture. The time that trapped animals spend in traps is reduced to a minimum, reducing the risk to the animal. The alarm triggers a siren loud enough to wake a sleeping person. Click on the photo below for more information.
Snow leopard populations with emphasis on camera trapping_a handbook ( English + Chinese)
Surveying Snow Leopard Populations with Emphasis on Camera Trapping (2006)