SOUND VELOCITY SENSOR - AQSV-1500.

The AQUAMATIC sound velocity sensor AQSV-1500 has no moving parts for detection of the sound velocity in water. The ultrasonic sensor operates in sea water as well as rivers, measuring velocity between 1400 - 1600 m/sec. profiling or monitoring.

The sensor contain one piezoelectric transducer (2 MHz) mounted in the main housing. One reflector plate mounted (52 mm away) in a adjustable distance from the transducer. Temperature stabilisation is obtained by using special "Invar" steel for the three distance pins. The measuring principle is "Sing Around" where the change in frequency (2 MHz) is converted into Sound Velocity.

Features include a pressure stable and waterproof construction designed for easy maintenance at sea. Small dimensions, good linearity, high accuracy and long time stability.
The acoustic transmission losses might be too large for proper operation, if the water contains bubbles of gas or air, if the water contains greater particles (diameter over ø 0,2 mm) or the water has high turbulence movement.

SPECIFICATIONS
Sound Velocity range : 1380 - 1600 meter/sec.
Accuracy : + 0.2 m/sec.
Repeatability : + 0.4 m/sec.
Response time - sensor : 66 msec. - 63 % of accurate value.
Response time - electronic : 220 msec.
Resolution - 12 bit. : 0.06 m/sec.
Linearity : + 0.2 m/sec.
Stability : Drift less than + 1.0% over 1 months.
Depth : 100 dbar or 140 psi.
Vibration - Shock : 10 to 2000 Hz - 10 - 30 G in 10 m sec.

AQUAMATIC, Ellebrinken 99, 8520 Lystrup, Denmark, Phone: +45 86 17-31-44,
E-mail: aquamatic@aquamatic.dk