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Ultrasonic Sensors

The Ultrasonic Sensors are used at the GWK to measures target distances, bottom profiles or wave heights. The working range of the M-300 Sensors covers a distance of 0.3 to 4.5 meters.

The systems advantages are their extraordinary ease of operation, genuinely user-friendly software, versatility in user-controlled outputs, and the ability to be set up without using a target. They transmit narrow beam sound pulses at a user selected rate (or they can be software triggered), process return echoes, and produce several outputs dependent on the position of the target.

The sensor´s software operates with MS Windows® operating systems using an RS-232/RS-485 or USB/RS-485 converter. This data link allows up to 32 sensors to be connected in parallel onto the same multi-drop communication network using the supplied protocol. This network also allows users to remotely program their sensors and read target distances for quick integration into their process control application.

Type / Model

MASSA M-300/95       

Measured variable

Bathymetrie and distance measurements in [m]

Range of measurement

0,3 – 4,5 m

Single Beam Angle

8° conical

Operating frequency

95 kHz

Sampling rate range

0.1 Hz to 20 Hz in 0.1 Hz increments


Analogue (Voltage: 0 – 10 V DC)


Length: 782 mm, Ø 48,26 mm


M-300 Software

Further Information

Datasheet (M300-95); Datasheet (USB-PTL4)