Process Control and Factory Automation with Massa’s mPulse® 220 kHz

The MassaSonic® mPulse® Model M-5000/220 Sensor is a short range, full featured, wired sensor with multiple outputs. It has a high measurement speed and high accuracy.

The mPulse® Sensor uses modern ultrasonic and microprocessor technology to transmit precision non-contact distance measurement for factory automation and industrial process control. The mPulse® Sensor is known for its flexibility in user-controlled outputs, ability to be set up without the need for a target, user-friendly software, and exceptional ease of operation.

The mPulse® Sensor is designed to transmit narrow beam sound pulses at a user-selected rate (or it can be triggered externally), processes return echoes, and generates a number of outputs based on the target position. The sensors provide non-contact measurement over a nominal target range of 4“ (100 mm) to 40" (1 m), and operate from 12 to 28 V DC.

Outputs include a 4 to 20 mA or 0 to 20 mA DC analog current loop, two independent set-point switches, and echo status by both an Echo Status Output switch and an LED indicator. The system’s outputs and parameters are fully user programmable through an RS-485 data link, eliminating sealing and tampering problems related to push-buttons or adjustment potentiometers.

Set-point hysteresis, sampling rate, loss-of-echo time-out, analog output slope, and averaging of multiple target distance measurements are extra programmable features of the mPulse® Sensor.

The user-friendly software from Massa​ works with a PC working under Windows® 10, 8, 7, 95, 98, XP, NT, and 2000 operating systems. The mPulse® Sensor can be connected to a PC through USB/RS-485 or RS-232/RS-485 converters.

The RS-485 data link allows up to 32 sensors to be on the same multi-drop communications network. For customers who do not wish to use a PC, the sensors can be programmed at the factory to meet the customers’ exact specifications for true “plug and play” operation.

The mPulse® Sensor includes other features, such as; protection from short circuits, reverse polarity and over-voltage, operation from -20 °C to 65 °C with built-in temperature compensation, diagnostic and monitoring outputs, and industry standard 30 mm diameter CPVC housing.


The following table lists the key specifications of the mPulse®220 kHz Sensor:


220 kHz  mPulse
Measurement Range 4" (100 mm) to 40" (1 m)
Measurement Resolution 0.01 inches (0.25 mm)
Sampling Rate 0.1 Hz to 100 Hz in 0.1 Hz increments
Loss of Echo Options 0, 3.5, 4.0, 20.0 or 20.5 mA
Trigger Modes

Internal, internal with trigger output, external,  external with delay, manual

Target Distance Averaging

Rolling Average: up to 32 samples; or
Boxcar Average: up to 1,024 samples

Housing Dimensions

30 mm diameter M-30X1.5 threaded tube, 100 mm long

Housing Material PVC
Operating Temperature -20 °C to 65 °C
Communication Converter

USB/RS-485 or RS-232/RS-485 with automatic send data control

Operating System Windows® 10, 8, 7, Vista, and XP SP3


Key Features

The main features of the mPulse® Model M-5000/220 Sensor are as follows:

  • Analog and setpoint outputs
  • Plug and play setup - no target needed
  • 4" (100 mm) to 40" (1 m) range
  • Software set span and zero - no pots or pushbuttons; tamperproof settings
  • Built in Temperature/sound speed compensation
  • Up to 32 sensors on RS-485 multi-drop loop
  • Easy to use setup software - Windows® 10, 8, 7, XP SP3, and Vista.
  • Low Cost of Ownership (CoO)


The mPulse® Model M-5000/220 Sensor is used in the following applications:

  • Liquid level control
  • Machine tool fluid level
  • Automatic filling operations
  • Paper/plastic film processing
  • Mechanical positioning
  • Roll diameter measurement
  • Web loop monitoring
  • Automatic packaging

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