depth measuring

SUB SEA SERVICE performs underwater average depth measurements that do not require any preparation of the surface to be measured. With the measuring devices of SUB SEA SERVICE, it is not necessary to remove the protective coating on any surfaces, protecting the elements against external attacks and corrosion.

All the ultrasonic thickness gauges used are calibrated for the speed of sound of the material to be subjected to measurement.

It should be known that each coating has a different speed of sound compared to metals, for example and, as such, it is necessary not to include them in the measurement.

The ultrasonic measurement systems used by SUB SEA SERVICE is based on the Triple ECO, able to ensure the complete exclusion of each type of coating

Product specifications

Range (Scale - Radius) of the sound speed
Single crystal with soft tip
Measurement scale (Size)
Probe dimensions
Maximum depth to be utilised
Dimensions of the Gauge
Temperature at which it can be used
Temperature at which it can be stored
From 1000 m/s to 8000 m/s (0.0394 in/us to 0.3150 in/us)
Options for the probe with a unique layer of crystal coating
2.25 MHz, 3.5 MHz, 5 MHz
3 - 250 mm (0.120" - 10"), 2 - 150 mm (0.080" - 6"),< br> 1 - 50 mm (0.040" - 2")
13 mm (0.5") & 19 mm (0.759, 13 mm (0.5"), 13 mm (0.5")
0.1 mm (0.005") or 0.05 mm (0.002")
0.1 mm (0.005") or 0.05 mm (0.002")
Large red 4-character 7-segment LED
500 Metres
235 mm x 80 mm (9.25" x 3.15")
Product casing in observance of regulations IP65, RoHS and WEEE
-10°C to + 50°C (14°F - 122°F)
-10°C to + 60°C (14°F - 140°F)

How do the depth gauges work?

The Ultrasonic depth gauges work by means of an ultrasonic pulse that passes through both the coating and the metal, being then reflected from the base of the wall. The return echo is reflected within the metal with only a small fragment of the echo that returns through the coating each time. The time calculated between the return of the small echoes provides the time of the echoes within the metal that is connected to the thickness of the metal.

The echoes must be consecutive so that the metre can automatically interpret them to then calculate the thickness.

A minimum of 3 echoes are examined each time. This system is called Automatic Measurement Verification System (AMVS).


Surface repeaters

The surface repeaters is a tool offering the opportunity to work in adverse weather conditions, allowing the installation of a surface repeater via a cable. The repeater is immediately able to view the measurements taken.

The metre is based on British standards according to the BS EN 15317:2007 regulations that regulate the characteristics and verification of all ultrasonic depth measuring equipment.

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