The RI Wireless Valve Monitoring Device (VMD) is the basic component of the RI Wireless Monitoring System. It is installed on top of the monitored valve or actuator and consists of a stem attached mechanically to the top of the valve or actuator axle. The VMW incorporates the means and sensors to measure the angle which corresponds to the opening status of the valve (in degrees or opening percentage). The valve status is transmitted by an internal bi-directional transceiver that is based on the standard ZigBee protocol. A dedicated LF receiver in the VMD supports unique maintenance and provisioning procedures.
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Agency Approvals

  • ATEX
  • Ex ia IIC T4 (Intrinsic safety Zone 1/21)
  • IEEE 802.15.4 - 2006 at 2.4 GHz
  • ISO/DIS 5211.2 F03 to F12 Flanges

Environmental Protection

  • IP66

Operating Temperature

  • -40° to 85° C (-40° to 185° F)

Accuracy

  • ±1°

Sensitivity

  • About 2 mV per Channel

Resolution

  • 0.1°

Actuator Type

  • NAMUR

Power Requirement

  • Lithium Batteries

Communication

  • Antenna
  • Data Rate: 1,366 bps
  • Two Way Radio
  • Zigbee Pro

Frequency

  • 125 KHz (3 Channels)

Power

  • 3 dBm

Connectors

  • F-SMA Connector

Rotation

  • -10° to 100°

Enclosure/Body Material

  • Nylon 12 with 50% glass beads, UV stable

Battery Life

  • 5 Years (Assuming one valve position change per hour and nominal configuration)

Distance

  • About 25 Meters (Indoors at non obstructed environment)
  • About 70 Meters (Open space)
  • LF Range (With OD): -1 Meter