Posted in | Level Sensors

The PulStar® 95kHz Sensor for Distance Measurement

Ruggedly designed transmitting modules, MassaSonic® PulStar® Series Ultrasonic Sensors offer continuous and reliable level or distance measurement of solid bulk materials, pastes, or fluids. PulStar Series Sensors deliver accurate operation at application ranges from 4" (100 mm) to 20' (6 m).

All PulStar® models incorporate the latest ultrasonic technology and processing algorithms, and they also offer exact non-contact distance measurement for applications including object detection, tank level monitoring, process control, or factory automation.

Structure interference causing false echoes is not an issue because of improved processing algorithms. The PulStar® Plus and PulStar® represent the next generation enhancements to Massa’s Legacy M-320 and M-300 series, and are fully backward compatible with existing M-320/ M-300 software and installations.

The new PulStar® Series Sensors have been custom designed for effortless mechanical and electronic interface to an OEM system integrator’s control system. The IP68 rated, RoHS and CE compliant sensors are available in three versions.

PulStar® Series Sensors provide of NPT mounting fittings and come in PVDF or PVC housings for use in different environments. All models are equipped with constant temperature compensation in order to obtain precise measurement accuracy. A few of the other user friendly characteristics include: diagnostic and monitoring outputs, and protection from over voltage, short circuits, and reverse polarity

PulStar® Series Sensors operate from 12 to 24 V DC and offer user programmable linear outputs of 0 to 10 V DC, 4 to 20 mA, or 0 to 20 mA, which correspond to the target’s measured distance. It is also possible to set the output in order to perform as a digital switch within zones defined by particular target setpoint distances.The PulStar TTL model operates on UART TTL at 1.8V.

Compatible with MS Windows operating systems, and when using RS-232/RS-485 or USB/RS-485 converters, up to 32 sensors can be linked in parallel onto the same multi-drop communication network. This network allows users to remotely program their sensors and read target distances for rapid incorporation into control applications.

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

PulStar® Series Sensors stand out over other sensors as they have versatile control options, affordable cost of ownership, user-friendly set up, and field proven reliability.

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
  • 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
  • Roll diameter measurement
  • Collision Avoidance
  • General use in non-contact distance measurement

Figure 1:PulStar for Waste Monitoring

PulStar® (Standard)

The standard models in the PulStar® Sensor Series are inexpensive, rugged, accurate, and particularly suitable if false echoes are not encountered from sound reflecting structures between the sensor and the surface being measured, and extended detection ranges are not needed.

Specifications of PulStar® Sensor (Standard):

The following are the key specifications of the PulStar Sensor (Standard)

Model 95 kHz (Medium Range)
PulStar (standard)
Minimum Detection Distance 12 inches
(300 mm)
Maximum Detection Distance 13 feet
(4 m)
Automatic User Programmable Adjustment of Detection Settings No
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



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.