Technical Reference Guide
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SENSING ENGINEERING INNOVATION Designed Engineered Manufactured Technical Reference Guide

DJB Instruments UK Ltd has been manufacturing accelerometers, cables, instrumentation and accessories for over 40 years. Originally established as DJ Birchall Ltd in 1974, it changed name in 2010 after the death of the company's founder, Don Birchall. After some major restructuring and re-investment, the company is now enjoying a period of expansion with truly global aspirations. DJB is proud to uphold the traditions of quality British manufacturing that has been admired for so long around the world and also maintains the fundamental engineering innovation that Don Birchall was well...

Piezoelectric Accelerometers Type Mono-axial Piezo-Tronic IEPE Accelerometers 0.19gm A/128/V A/127/V A/124/E A/124/TE A/124/TS A/123/E A/123/S A/123/TS A/123/TE A/122/V A/120/V A/120/VT A/120/VTC A/120/VI A/120/VTI A/121/V A/121/VI A/1600/V A/1600/VT A/120/CR Mono-axial Piezo-Tronic IEPE Accelerometers - High Shock Tri-axial Piezo-Tronic IEPE Accelerometers AT/18 1mV/g up to 10mV/g Mono-axial Piezoelectric Charge Accelerometers Tri-axial Piezoelectric Charge Accelerometers AT/08 0.4pC/g nom. 1.2gm Mono-axial Charge Accelerometers - Seismic A/800 9nC/g nom. 400gm Mono-axial...

Piezoelectric Accelerometers Instrumentation Piezoelectric Accelerometers Accelerometer Selection – Points to consider… • Mass - Mass loading is the effect of adding mass to a test item which then changes the dynamic characteristics of that item. We have a great video on our Youtube page to show this phenomena, well worth a look. Sensitivity – Consider the measurement range you require. An IEPE accelerometer is limited by its voltage output, so a 100mV/g accelerometer measures nominally 50g, whilst a 10mV/g measures 500g. The sensitivity you use needs to cover the whole range of your likely...

Mono-axial Piezo-Tronic IEPE Accelerometers Integral Electronics, Voltage Output All dimensions given in mm (L x W x H) not including the connector Micro Miniature A/128/V Sensitivity 1mV/g up to 10mV/g Weight 0.19gm Size (mm) 5.1 x 03.1 x 2.1 Min-Max. Temp -50°C • 200°C Connector L8/Microdot Sensing Element Shear Plate Piezo-Ceramic Mounting Adhesive Sensitivity 1mV/g up to 250mV/g Weight 3.6-5.2gm Size (mm) 9.5 (A/F) x 10 Min-Max. Temp -50°C • 125°C (185°C HT) Connector 10-32 UNF Microdot Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive, M4x5mm integral stud 17.2 x 016 x...

Piezoelectric Accelerometers High Shock Mono-axial IEPE Accelerometers Integral Electronics, Voltage Output All dimensions given in mm (L x W x H) not including the connector Connector M5 or Integral Cable Connector M5 or Integral Cable Connector Integral Cable Sensing Element Shear Plate Piezo-Ceramic Sensing Element Shear Plate Piezo-Ceramic Sensing Element Shear Plate Piezo-Ceramic Piezoelectric Accelerometers – The principle of operation and design: All piezoelectric accelerometers operate on the same principle, a mass applies a force to a piezoelectric material (crystal or ceramic) and...

AT/18 Sensitivity 1mV/g up to 10mV/g Weight 1.2gm Size (mm) 7 x 7.5 x 5.6 Min-Max. Temp -50°C • 200°C Connector 1m integral cable, 3 X BNC or 4 pin %-28 UNF Sensing Element Shear Plate Piezo-Ceramic Mounting Adhesive

Mono-axial PiezoelectricAccelerometers Charge Output Connector Integral A/28/E-1 L8 A/28/E Sensing Element Shear Plate Piezo-Ceramic Mounting Adhesive Connector L5 Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive Connector M3.5 KP Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive Connector M3.5 KP Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive, M4 x 5mm Integral stud Connector 10-32 UNF Microdot Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive, M5 x 5mm Integral stud Weight 12gm Size (mm) 17.2 x 16 x 8.1 Min-Max. Temp -50°C •...

Charge Output All dimensions given in mm (L x W x H) not including the connector AT/08 Sensitivity 0.4pC/g nom. Weight 1.2gm Size (mm) 7 x 7.5 x 5.6 Min-Max. Temp -50°C • 200°C Connector 1m integral cable, 3 X BNC or 4 pin %-28 UNF Sensing Element Shear Plate Piezo-Ceramic Mounting Adhesive A/36, A/36-1 Sensitivity 5pC/g Weight 18gm Size (mm) 24 x 17 x 10.7 Min-Max. Temp -50°C • 220°C Connector 10-32 UNF Microdot Sensing Element Konic Shear Piezo-Ceramic Mounting Adhesive, Mounting clip, 3 x mounting holes IEPE & Charge Accelerometers - Pros and Cons IEPE: Pros • Use wide range of cable...

Piezoelectric Accelerometers Mono-axial Seismic Accelerometers All dimensions given in mm (L x W x H) not including the connector Seismic Accelerometers... IEPE micro g measurement A/1800/V, A/1800/VT, A/1800/VTC Sensing Element Shear Plate Piezo-Ceramic Sensing Element Shear Plate Piezo-Ceramic Charge output micro g measurement A/800, A/800/T, A/800/TC are generally much bigger and heavier than other test and measurement accelerometers. This is due to the much higher quantity of piezoelectric material and the large mass material required to create the high output (typically 10V/g or...

Mono-axial Industrial Piezoelectric Accelerometers Charge Output All dimensions given in mm (L x W x H) not including the connector A/53/F, A/53/F/HT Sensitivity 12pC/g (A/53/F), 1.7pC/g nom. (A/53/F/HT) Weight 20gm (exc cable) Size (mm) 33 x 13.7 x 14.2 Max. Temp 260°C (A/53/F) 400°C (A/53/F/HT) Connector 7/16 UNS HT Microdot Cable Integral Hardline Cable Mounting 2 x 05.2mm holes @ 24.4mm ctrs. A/52/F, A/52/F/HT Sensitivity 100pC/g (A/52/F), 12pC/g nom. (A/52/F/HT) Weight 100gm (exc cable) (A52/F) 123gm (exc cable) (A/52/F/HT) Size (mm) 50.8 x 29.6 x 21.7 Max. Temp 260°C (A/52/F) 400°C...

Piezoelectric Accelerometers Piezoelectric Dynamic Pressure Transducers Low Cost Mono-axial Industrial IEPE Accelerometers All dimensions given in mm (L x W x H) not including the connector Mounting ¼-28 UNF Base tapped Mounting ¼-28 UNF through hole Connector Integral Overbraided Stainless Steel Cable Connector 10-32 UNF Microdot skt Case Seal Welded, hermetic diaphragm Case Seal Welded, hermetic diaphragm Mounting ¼-28 UNF Base tapped Accelerometer Specifications Explained Constant current supply – 2-20mA, supply voltage 15-35V DC. This is the range of supply voltage/currents that the...