Bullet Sensors & Transducers e-Digest, Vol. 85, Issue 11, November 2007: Product News

    (ISSN 1726- 5479)


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Long Range Smart Ultrasonic Sensors



The new MassaSonic™ M-300/150 and M-300/95 smart ultrasonic sensors are now available from sensing specialists Vydas International Marketing  and  offer longer ranges for the popular M-300 series family of RoHS compliant ultrasonic sensors.


The M-300/150 detection range is up to 2.5 meters and the M-300/95 is up to 4.5 meters. This complements the already established M-300/210 which has a range approximately from 100mm up 1.3 meters maximum.


Manufactured by Massa Products Corp USA, the M-300 ultrasonic sensor design incorporates state-of-the-art ultrasonic and microprocessor technology to provide low cost precision non-contact distance measurement for factory automation or industrial process control.


Massa has been producing ultrasonic transducers that operate in air for industrial applications for over fifty years and have designed hundreds of different types of transducers, having a wide variety of electroacoustic characteristics, for use in many applications. These include liquid and bulk level detection, mechanical positioning, roll diameter measurement, web loop monitoring, counting, position location, automatic filling operations, profiling, collision avoidance, web break detection and tensioning, automatic packaging, ultrasonic intrusion alarms, paper and plastic film processing and even an automatic scoring system for ten-pin bowling.


The M-300 series ultrasonic sensors stand out over all other systems because of their affordability while providing extraordinary ease of operation, genuinely user-friendly software, versatility in user-controlled outputs, and the ability to be set up without using a target. The sensor transmits narrow beam sound pulses at a user-selected rate (or it can be software triggered), processes return echoes, and produces several outputs dependent on the position of the target.


Operating from 12 to 24 V DC, the M-300 Family includes several sensor models that operate at different ultrasonic frequencies with different ranges. A linear output of 0 to 10 VDC is provided, which is proportional to the measured distance to the target from the minimum detection distance to the nominal maximum target distance specified for the particular M-300 model.


This output voltage range, however, can be easily reprogrammed to start and end anywhere between 0 and 10 V DC. The corresponding target distance span can also be set to start and stop at any two target ranges. This output voltage can also be programmed to operate as a digital switch at a specified target setpoint distance.

Smart ultrasonic sensors


The system parameters and outputs are programmable via an RS-485 data link, thereby eliminating problems associated with adjustment potentiometers or pushbuttons. Some additional programmable adjustments include: analog output slope, sampling rate, averaging of multiple distance measurements, loss-of-echo time-out, setpoint hysteresis when operating in the digital switch mode, and a software sensor transmit trigger.


The M-300 ultrasonic sensors user-friendly software operates with Windows® operating systems using an RS-232/RS-485 or USB/RS-485 converter. This data link allows up to 32 sensors to be on the same multi-drop communications network using the supplied protocol.


This network also allows users to remotely program their sensors and read ranges for quick integration into their process control application. For users that prefer not to use a PC, the sensors can be programmed at the factory to the customer's exact specifications for true 'plug and play' operation.


Other features of the M-300 ultrasonic sensor include: a totally sealed PVC housing containing an industry standard 1" NPT fitting for mounting, operation from -20°C to 65°C with built-in temperature compensation, diagnostic and monitoring outputs, and protection from over-voltage, short circuits, and reverse polarity.



Cliff Wyatt

Vydas International Marketing

Swan House Passfield Business Centre

Lynchborough Road,  Passfield, Hants, GU30 7SB, UK

Tel.: +44 (0)1428 751822, fax: +44 (0)1428 751833

E-mail: cliff@vydas.co.uk



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