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VR4-UWM (Underwater Modem)

Receivers

 

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The VR4 Underwater Modem (VR4-UWM) Receiver is a submersible receiver capable of  communicating remotely to a surface modem and identifying all VEMCO coded transmitters (both 69 kHz and 180 kHz tags). 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.

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 coded transmitters.

The VR4-UWM’s fast acoustic “wake up” enables modem communication in less than 30 seconds. It’s 6-plus years battery life can be significantly extended by independently switching receiver channels on or off to save power. All receiver functions can also be switched off to save power during shipping and storage without removing the battery or opening the case.

To learn more, download the VR4-UWM Datasheet.

 

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Key Features

  •  Ideal for site residency and migratory studies involving many animals over an extended period
  •  Suitable for offshore deployments and/or in deeper water
  •  Capable of communicating remotely to a surface modem
  •  Identifies all VEMCO coded transmitters (both 69 kHz and 180 kHz tags)
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