Posted in | Level Sensors

PulStar® Plus 95kHz for Non-Contact Level Measurement

MassaSonic® PulStar® Series Ultrasonic Sensors are transmitting modules that offer reliable continuous level or distance measurement of fluids, solid bulk materials, or pastes. These sensors are ruggedly designed, and accurately function at application ranges from 4″(100 mm) to 20′ (6 m).

All PulStar® models incorporate advanced ultrasonic technology and processing algorithms, which enables the sensors to provide precision non-contact distance measurement for applications such as process control, tank level monitoring, factory automation, or object detection applications.

False echoes caused because of structure interference are not an issue because of advanced processing algorithms. The PulStar® and PulStar® Plus are the advanced improvements to Massa’s Legacy M-300 and M-320 product lines, and are fully backward compatible with current M-300/M-320 installations and software.

The new PulStar® Series Sensors are built for easy mechanical and electronic interface to the control system of an OEM system integrator. The sturdy sensors are IP68 rated, RoHS and CE compliant, and are offered in three versions.

PulStar Series® Sensors are provided with NPT mounting fittings and come in PVDF or PVC housings for use in various environments. All models are fitted with nonstop temperature compensation to accomplish precise measurement accuracy. Other user-friendly attributes include diagnostic and monitoring outputs, coupled with protection from short circuits, over voltage, and reverse polarity.

PulStar® Series Sensors operate from 12 to 24 V DC, and provide user programmable linear outputs of 0 to 10 V DC, 4 to 20 mA, or 0 to 20 mA, which are proportional to the measured distance to the target. The output can also be equipped to function as a digital switch within zones defined by specified target setpoint distances. The PulStar® TTL model operates on UART TTL at 1.8V.

They are compatible with MS Windows operating systems, and while using RS-232/RS-485 or USB/RS-485 converters, it is possible for up to 32 sensors to be connected in parallel onto the same multi-drop communication network. This network also allows users to program their sensors remotely and read target distances for rapid integration into control applications.

All PulStar® Sensors are modifiable for sampling rate, analog output slope, averaging measurement, setpoint hysteresis, loss-of-echo time-out, and provide a software sensor transmit trigger.

Their user-friendly set up, field proven reliability, economical cost of ownership, and versatile control options make the PulStar® Series Sensors stand out over other sensors.

Key Features

The main features of the PulStar® Series Sensors are as follows:

  • Continuous or switch mode
  • Tamperproof and rugged compact housing
  • Temperature compensated
  • Plug and play setup
  • Narrow beam and short dead band
  • Up to 32 sensors on RS-485 multi-drop network
  • Many easy user programmable customizations
  • IP68 enclosure rating
  • Economical cost of ownership (CoO)
  • Accurate under demanding environmental conditions


The main applications of the PulStar® Series Sensors are given below:

  • Liquid and solid level control
  • Position detection
  • Bulk material management
  • Tanks, totes, processing
  • Web loop monitoring
  • Roll diameter measurement
  • Automatic packaging operations
  • Lift/Pump Stations
  • Wet Wells
  • Manhole Surcharge Monitoring

PulStar® Plus

The PulStar® Plus Sensor additional features include drop down menus to auto change detection settings to disregard false echoes caused by stationary objects in the sound path (mounting tubes or structured elements in a set-up), and contain a high power setting for an extended detection range.

Specifications of PulStar® Plus 95 kHz Sensors

The following are the key specifications of PulStar Plus 95kHz Sensors:

Model 95 kHz (Medium Range)
PulStar Plus
Minimum Detection Distance 8 inches
(200 mm)
Maximum Detection Distance 20 feet
(6 m)
Automatic User Programmable Adjustment of Detection Settings, Power Selection Yes
0 to 10 V DC Analog Output Model Yes
0/4 to 20 mA DC Analog Output Model Yes
Housing Material PVC or PVDF
Mount 1 inch NPT
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


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