PCB Piezotronics - PRODUCT NEWS



PCB Piezotronics to show dual bridge load cells, high shock MEMS and microphones at Advanced Engineering Show 2014

PCB Piezotronics, a world leader in vibration, acoustic, pressure, force and torque sensors will be exhibiting its wide range of industrial sensors, accelerometers and microphones at the forthcoming Advanced Engineering Show, NEC, Birmingham, UK, 11th & 12th November 2014

A new range of strain gauge dual bridge load cells for aircraft structural, lifetime and fatigue testing will be shown along with new microphone products including the 377B26 probe microphone designed for R&D engineers needing to measure sound pressure in confined areas. There will also be high-g shock MEMS accelerometers capable of measuring long duration transient motion as well as responding to and surviving extremely fast rise times typical of applications such as down-hole oil exploration, pyroshock and crash/impact environments.

PCB's new series 1400 strain gauge dual bridge, fatigue rated load cells are designed specifically for iron bird and airframe structural, lifetime and fatigue testing applications on wings, fuselage, landing gear and other airframe components. Features include dual outputs to provide sensor redundancy and the ability to provide control feedback from one bridge while the other is used for data acquisition. The new load cells are available in multiple ranges, include thermal compensation and are supplied complete with load bases as standard. The load cell including load base comes complete with A2LA accredited calibration to ISO 17025 in both tension and compression modes.

An additional feature - moment compensation - helps to maintain accurate output from the sensor in the presence of eccentric loading and side loads that are often experienced during highly repetitive load testing cycles. A single shunt calibration resistor is provided with each load cell to simplify calibration at the test site.

PCB's latest probe microphone - model 377B26 - is designed for R&D engineers who need to measure sound pressure in confined areas. The probe tip diameter is extremely small measuring 1.3mm which enables white goods, telephone, headphone, loudspeaker and musical instrument manufacturers to make measurements in small, confined and difficult-to-access areas that cannot be accessed using traditional microphones, which are typically larger. The small size of the probe tip also allows near field measurements with minimal disturbance of the sound field. This enables more accurate test results.
The probe microphone comprises four components: pre-polarised microphone, preamplifier, housing and several probe tips of different lengths. The components work together to provide a maximum operating temperature of 800°C, much greater than traditional test & measurement microphones. The high temperature capability and small diameter make it an excellent choice for HVAC manufacturers and test engineers performing leak detection tests at elevated temperatures.

Other microphones on show will be models 378B02, 377B02 and 130E20, available with the same high quality as always but now at more competitive pricing than ever following improvements in the manufacturing process. Designed for product testing in anechoic chambers or environmental testing, model 378B02 is a ½ inch pre-polarised free-field condenser microphone and ICP® preamplifier. Model 377B02 is a ½ inch free-field, polarised condenser microphone cartridge that can be paired with any IEC compliant preamplifier. Model 130E20 is a ¼ inch ICP Array microphone with integral preamplifier designed for use in various applications including acoustic holography, beam forming and general purpose audible range test applications.

Offering the same high quality and market leading warranty, PCB Piezotronics three microphones are also available through the company's "On Your Desk Within 5 Days" programme.

PCB Piezotronics has also published a free Microphone Handbook that provides an in-depth guide covering technology fundamentals & microphone types, selecting & specifying microphones, applicable standards, interfacing & design information, maintenance for microphones & preamplifiers and future developments in acoustics. This publication can be downloaded from http://www.pcb.com/micFlipbook or is available as hard copy from PCB Piezotronics UK.

MEMS high-amplitude shock accelerometers will also be on show including series 3501 and 3503 both available with ranges of 20,000 and 60,000g. These state-of-the-art miniature DC response acceleration sensors are capable of measuring long duration transient motion as well as responding to and surviving extremely fast rise times typical of a high-g shock event. Both packaged and OEM configurations are available to fulfil a variety of installation requirements.

The lightly air-damped acceleration sensing element - micromachined from silicon - is manufactured with the latest advances in etching techniques using the latest equipment. This tiny element - measuring just 2.5 x 1.7 x 0.9mm - incorporates a seismic mass, protective over range stops and a full active piezoresistive Wheatstone bridge.

The 3501/3 series MEMS sensors are intended to fulfil the most demanding aerospace, industrial and commercial application requirements. Applications include consumer electronics drop testing, down-hole oil exploration, tool manufacturers, pyroshock and crash/impact environments.

September 2014

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