“NDT systems” develops and manufactures AE piezoelectric transducers. A study of the frequency response of the sensors is carried out using the approaches and practicesfrom ASTME976 and E1106.
Each manufactured sensor is supplied with the measured frequency response data. Typically, the measurement is done by direct excitation of the sensor coupled face-to-face to a reference wideband acoustic emitter. This method is simple and gives good reproducible results. However, one must understand that this method is not accurate and gives just an estimate.
The sensor converts the energy of elastic acoustic waves into an electrical signal. The sensor housing is made of stainless steel. Piezo inside the housing is protected by the ceramic, which acts as an electrical insulator and protects the piezoelectric from mechanical damage. The sensors are sealed and designed to work under adverse weather conditions at a temperature from -40 ° C to +100 ° C. Sensors with integrated amplifier designed for temperatures ranging from -40 ° C to +70 ° C
Typical applications of sensor RS-30 - oil tank bottoms diagnosis. RS-90 is popular in the diagnosis of pipes, and RS-150 is widely used to diagnose high-pressure tanks. RS-400 is a wideband sensor for different applications.
Sensors with integral amplifier are rather popular due to its small size. Low-noise integral preamplifier incorporateslowpass and highpass frequencyfilters, 4-th orderwith slope of24dB/octave. Built-in amplifier has a calibration bypass.
To fix the sensors on the magnetic surfaces the magnet holder RMH-01 was designed . The material of cylindrical insulator was specifically chosen for a better attenuation of ultrasound. Flexible flat spring improves the mounting to the curved surfaces. The total magnetic force on a flat surface is 28kg.
|model||Peak freq.||size||weight||connector||capacity||Built-in magnet||Built-in amplifier|
|RS-150L||100-200 kHz||Ø19.5×20||20g||lemo||500 pF||---||---|
|RS-30L||30-250 kHz||Ø23×33||47g||lemo||180 pF||---||---|
|RS-30LM||30-250 kHz||Ø26×33||80g||lemo||180 pF||×||---|
|RS-90L||50-120 kHz||Ø22×37||43g||lemo||150 pF||---||---|
|RS-90LM||50-120 kHz||Ø25×33||33g||lemo||150 pF||×||---|
|RS-150S||100-200 kHz||Ø19.5×20||20g||sma||500 pF||---||---|
|RS-150SM||100-200 kHz||Ø26×24||35g||sma||500 pF||×||---|
|RS-150LM||100-200 kHz||Ø26×20||26g||lemo||500 pF||×||---|
|RS-75L||30-100 kHz||Ø22×37||70g||lemo||150 pF||---||---|
|RS-400L||100-500 kHz||Ø17.5×20||20g||lemo||150 pF||---||---|