1. Catalogs
  2. DJB Instruments UK Ltd
  3. Piezo-Electric Accelerometers - A/38

Piezo-Electric Accelerometers - A/38

Piezo-Electric Accelerometers - A/38

Product catalog summary
Overview: This document provides technical specifications and details for a micro-miniature triaxial piezo-electric accelerometer, specifically models A/38 and A/38-1. These devices are designed for precise vibration measurement across three axes.
Specifications:
  • Charge Sensitivity: 0.3/0.6 pC/g for X, Y, Z axes with a deviation of ±5% from nominal.
  • Capacitance: 220/340 pF.
  • Resonant Frequency: 32 kHz for X and Y axes, 36 kHz for Z axis.
  • Cross Axis Error: Maximum 5%.
  • Temperature Range: -50°C to +200°C with sensitivity deviations of -5% at -50°C and +10% at +200°C.
  • Pyro-electric Output: 0.2 g/°C with a corner frequency of 0.001 Hz.
  • Base Strain Sensitivity: Less than 0.002 g/µ strain.
  • Maximum Continuous Acceleration: 2000 g sine.
  • Insulation Resistance: 1000 M ohms at 100V, 20°C.
  • Materials: Stainless steel 303 S31 inserts and aluminum alloy mounting block.
  • Mounting: 1x2.1mm diameter through hole for A/38.
  • Weight: 0.9/1 gm.
  • Connector: L8.
  • Case Seal: Transducer inserts are welded and bonded into a hard anodized aluminum block.
Design and Functionality:
  • The accelerometer consists of three shear plate inserts bonded orthogonally into a hard anodized aluminum housing, providing mechanical isolation and minimizing strain-induced errors.
  • The inserts are electrically insulated to prevent ground loop interference.
  • Designed for accurate three-axis measurement, it addresses potential errors in single-axis vibration or shock measurement due to directional properties.
  • The A/38-1 model features three output connectors in the same horizontal plane.
Performance Graphs:
  • Frequency Response: Shows deviation percentage across a range of frequencies, indicating stable performance up to 10 kHz.
  • Temperature Response: Illustrates deviation percentage across the temperature range, highlighting sensitivity changes at extreme temperatures.
See more

Catalog excerpts

Piezo-Electric Accelerometers - A/38-1

Micro-miniature triaxial piezo-electric accelerometer A/38, A/38-1 0.4pC/g nom./axis icro-miniature triaxial vibration transducer comprising three shear plate. A/28/E inserts bonded orthogonally into a hard anodised aluminium housing. The inserts are electrically insulated, individually and from the housing, thus eliminating ground loop interference. The 3 output connectors of the A/38-1 are in the same horizontal plane. The spatial response of a structure to dynamic forcing may lead to erroneous single axis vibration or shock measurement, due to the inherent directional property of the transducer. FREQUENCY RESPONSE TEMPERATURE RESPONSE In cases where this is deemed to be a problem, an orthogonal three axis measurement, allowing computation of absolute value and direction offers a solution. The additional mechanical isolation implicit in the construction provides also near elimination of strain induced error. CONVERSION MODE Charge sensitivity pC/g (X, Y, Z) Charge sens. % deviation re nom. Capacitance pF Resonant frequency kHz Cross axis error % max Temperature range °C Charge sensitivity deviation re 20°C Pyro-electric output, g/°C Pyro-electric corner freq. Hz Base strain sens. g/µ strain Max continuous accn. g sine Insert/block insul.resce., M ohms Materials OPTIONS > wideband temperature calibration Mounting Weight gm Connector Case seal

 Open the catalog to page 1
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.