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Valve Monitoring Device
Brand: Rotork PLC
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.
Specifications
Brand
Accuracy
- ± 1°
Approvals & Certifications
- Ex ia IIC T4 (Intrinsic Safety Zone 1/21)
- IEEE 802.15.4 - 2006 at 2.4 GHz
Battery Life
- 5-Years (Assuming One Valve Position Change Per Hour & Nominal Configuration)
Case Material
- Nylon 12 with 50 % Glass Beads, UV Stable
Communication
- Data Rate: 1,366 bit/sec
- Zigbee Pro
Distance
- About 25 metres (Indoors at Non-Obstructed Environment)
- LF Range (with O.D.): -1 Meter
Environmental Protection
- IP66
Frequency
- 125 kHz (3-Channels)
Operating Temperature
- -40° to 85° C (-40° to 185° F)
Power
- 3 dBm
Power Requirement
- Lithium Batteries
Resolution
- 0.1°
Rotation
- -10° to 100°
Sensitivity
- About 2 mV Per Channel
VDM Antenna
- F-SMA Connector
- Internal +2 dBi Peak