High Temp. Water Cooled Piezoelectric Triaxial Accelerometer - A/33

The A/33 is a water-cooled triaxial piezoelectric charge output accelerometer designed for vibration measurement on surfaces operating at extremely high temperatures. With appropriate water flow, the A/33 supports measurements on surfaces up to 900°C, making it well suited to exhaust systems, turbocharger assemblies and other high-temperature test environments.

Developed using DJB’s Konic Shear® sensing technology, the A/33 has since been applied across a wide range of demanding high-temperature vibration measurement applications beyond its original automotive use cases.

Key specifications

• Sensitivity: 7 pC/g nominal
• Weight: 38 g
• Maximum temperature: -50°C to 900°C with water flow

Model variations

• A/33 triaxial
• Mono-axial versions available on request

Design and construction

The A/33 consists of three Konic Shear® mono-axial charge accelerometers mounted into an anodised aluminium block, providing triaxial measurement with the added benefit of single-axis repair if required. Electrically insulated individual inserts help eliminate ground loop interference during testing.

Water cooling is delivered via two titanium pipes. When operating at high temperature, a continuous water flow rate of approximately 0.5 litres per minute is recommended. At the highest temperatures, a constant supply of chilled cooling water should be used. Failure to maintain adequate water flow may result in damage to the unit and risk of injury.

When using multiple A/33 units within a single test setup, it is recommended that each accelerometer is operated with its own dedicated cooling pump.

Features

• Secure mounting via 5.5 mm cut-through fixing hole
• Lightweight design for high-temperature applications
• Konic Shear® piezoelectric sensing elements
• Operating temperature up to 900°C with water flow
• Operating temperature between -50°C and 220°C without water flow
• Electrically insulated inserts to reduce ground loop interference

Applications

• Automotive
• Aerospace
• High-temperature testing
• Exhaust system vibration measurement
• Turbocharger testing

How to reach us

Let us know what you're working on and how we can help.

• Phone: +44 (0)1638 712 288
• Email: Email the DJB sales team
• Hours: 9 am – 5 pm (UK time), Monday to Friday