VR4 Underwater Modem (VR4-UWM)

The VR4 Underwater Modem (VR4-UWM) Receiver is a submersible receiver capable of identifying all VEMCO coded transmitters (both 69 kHz and 180 kHz tags) and communicating remotely to a surface modem. The VR4-UWM is designed to be a flexible and reliable means of recording fish telemetry data and then transmitting the stored data to a surface unit on demand. It is ideal for site residency and migratory studies involving many animals over an extended period and is suitable for offshore deployments or in deeper water.

Proven Technology
Based on the proven technology of the VR2W, the VR4-UWM can store more than 800,000 detections. It can be deployed and left undisturbed for more than 6 years so you can get data quickly without having to retrieve and redeploy your receivers. As the successor to the VR3-UWM, the VR4-UWM boasts numerous enhancements over its predecessor such as greater depth rating, more memory and the ability to detect all VEMCO transmitters.

Key Features

• Approximately 1100 Baud data rate
• Maximum depth rating of 500 metres
• Dual channel frequencies of 69 kHz and 180 kHz
• > 6-year battery life
• Stores > 800,000 detections
• Fast acoustic "wake up" enables modem communication in less than 30 seconds
• Receiver channels can be independently switched on or off to save power and significantly extend battery life
• All receiver functions can be switched off to save power during shipping and storage without removing the battery or opening the case

Download the PDF brochure below to learn more about the VR4-UWM or contact a VEMCO sales representative.