1 Introduction
Aimed primarily at the underwater vehicle market, the uvSVX is a compact direct reading
instrument that outputs a selectable, fixed data string at up to 64Hz of Sound Velocity,
Temperature, Depth and optionally, Salinity and Density calculated with Valeport’s proprietary
DASH formula. High accuracy data is assured with the added bonus of Valeport’s unique
interchangeable pressure module that allows customers to maximise operational specific depth
requirements. This innovative pressure module, with integral calibration, can be changed in a
couple of minutes without opening the instrument.
There are two communication options of the uvSVX, RS232 / RS485 and Ethernet
uvSVX - Sound Speed, Exchangeable Pressure and Temperature
for underwater vehicles
To be used in a variety of subsea applications ROVs, construction survey, monitoring and
positioning operations, one of the key development drivers was to provide a cost-effective
alternative to the use of resonant quartz pressure sensors. Using the very latest technology in
temperature compensated piezo-resistive transducers, the uvSVX offers several advantages over
resonant quartz sensors, with similar performance - cost, maintenance and operationally specific
pressure ratings.
Valeport's DASH equations are included in the uvSVX, as standard and provide a real-time water
density output.
• Interchangeable Pressure Sensor Module
- Pressure ranges from 10 to 600 Bar (approximately 100 to 6 000 metres water)
- Titanium diaphragm pressure sensor
▪ No external diaphragms, oil reservoir or oil-filled tubes
- Long term calibration stability with a 2 year recommended recalibration cycle
• Sound Speed
- Valeport's industry standard 25mm baseline, Digital Time of Flight sound speed sensor
• Temperature
- fast response PRT
• Titanium housing
• RS232 or RS485 (addressable) data output
• ASCII and Modbus RTU output protocols
• Choice of calibrated data output format at a sampling rate of up to 64Hz
• TEOS 10 seawater properties of water computation for depth calculation
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