Measuring Uneven Bulk Materials or Liquids with the Flatpack® 95 kHz

The MassaSonic® FlatPack® Sensors from Massa are optimized to provide consistent non-contact distance measurement of uneven solid bulk materials, fluids, or pastes in constrained working zones for application ranges from 1" (25 mm) to 13' (4 m).

The low profile designed ultrasonic transmitter modules are integrated with modern dual-transducer ultrasonic technology and processing algorithms, providing precise measurement for factory automation, pipe and conveyor belt blockage, tank level applications with non-uniform surfaces, and warehouse materials control, and chute monitoring of mining/construction equipment.

FlatPack® Sensors are suitable to monitor or control in-pipe flow levels of waste water pipes or renewable energy systems. The sensors have a unique dual transducer design with a 15° system beam angle, and because of this, it is unlikely that solid materials with non-uniform surfaces will affect the maximum range capabilities, as is the case with single transducer sensors using narrow beam angles.

The FlatPack® Sensors are IP68 rated and complaint with CE and RoHS. These sensors have field proven designs and come with PVC housing for use in all-weather resistant moderate chemical environments between -40 °C and 70 °C. As the sensors are provided with an integrated mounting plate with pre-formed holes, they can be installed easily.

All of the models are supplied with constant temperature compensation that guarantees precise speed of sound calibration and measurement accuracy. Other user-friendly characteristics include protection against reverse polarity, monitoring and diagnostic outputs, over voltage, and short circuits.


The key specifications of the FlatPack® 95 kHz Sensors are as follows:

Model 95 kHz (Medium Range) FlatPack
Minimum Detection Distance 4 inches
(100 mm)
Maximum Detection Distance 13 feet
(4 m)
0 to 10 V DC Analog Output Model Yes
0/4 to 20 mA DC Analog Output Model Yes
Housing Material PVC
Mount Integrated mounting plate with pre-formed holes
Operating Temperature Range -40 °C to 70 °C
Electronic Communication Using a Computer RS-485 data link allowing up to 32 sensors on a multi-drop communication network

Figure 1: Flatpack in Pipe Level

Key Features

The key features of the FlatPack® 95 kHz sensors are as follows:

  • Operates on uneven solids or liquids
  • IP68 enclosure rating
  • Temperature compensated
  • Up to 32 sensors on RS-485 multi-drop network
  • Rugged and tamperproof
  • Broad range of user programmable customizations
  • Accurate under demanding environmental conditions
  • Low cost of ownership (CoO)
  • Short dead band and dual transducers


The key applications of the FlatPack® 95 kHz sensors are as follows:

  • Bulk material management
  • Position detection
  • Uneven solids control
  • Liquid level control in turbulence
  • Conveyor belt, hopper, and chute monitoring
  • Monitoring fluid level in pipes
  • Conduit and pipe blockage detection

Other Equipment by this Supplier

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.