Sensors & Transducers


Keep your ear to the ground

October 2023 Sensors & Transducers

The SKF TKST 21 Stethoscope is a high-quality handheld instrument that monitors noise in bearings, machines and components. “The ability to ‘listen’ to rotating equipment and machine components, detect errors, and reliably identify the possible cause of the noise at an early stage, allows for preventive maintenance before costly failures can occur,” says business development manager, Eddie Martens. The device can be applied in a wide variety of industry sectors including power plants, automotive, recycling, materials handling, food and beverage, and paper mills.

The TKST 21 consists of the handheld instrument, a headset with an adjustable ten-level volume control, two probes of differing lengths (70 mm and 300 mm) for easy access to hard to reach areas, two AA Alkaline batteries, and an instruction manual. Everything is neatly packed inside a sturdy carry case for easy portability, handling and storage.

The Stethoscope is able to pick up noise in a range of components such as bearing housings, gears, valves, vents and pumps. The device captures the most common problematic bearing noises such as damaged bearings and balls, damaged inner and outer rings, and ash contamination and cavitation; valve chatter, tappet noise and piston slap can also be monitored.

Once the acoustic data (noise) is captured by the probe, the recorded audio is transmitted to a sensor, converted into an electrical signal, processed and amplified, and then fed to the headset or a recorder. Operators have the option of listening in live mode through the high quality, noise-cancelling ear defender approved headset, or recording the sounds for replay and comparison with the live sound. “The excellent sound quality enables the operator to identify the sound of problematic parts reliably, clearly and accurately, even in extremely noisy environments,” adds Martens.

The device is lightweight (1670 g) and ergonomically designed for convenient and comfortable one-hand operation. A large, backlit colour display, a unique feature for this type of device, facilitates viewing.

The user-friendly settings menu allows for easy navigation through a host of functions such as changing the display brightness, switching the volume limiter OFF, etc. The Stethoscope can even be muted if required. The instrument operates in a frequency range of 30 Hz to 15 kHz and will perform optimally in temperature extremes of -10 to 45°C. The battery lifetime will provide a minimum of ten hours of operation during continuous use.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

SKF achieves SaiMechE CPD accreditation
SKF South Africa News
SKF South Africa has achieved SaiMechE CPD accreditation, a decisive step that empowers the next generation of engineers.

Read more...
Sealed split spherical roller bearings slash MTTR by 70%
SKF South Africa Motion Control & Drives
SKF Cooper sealed split spherical roller bearings have a unique split design combined with a robust sealing system. These innovative bearings enable fast, simple, onsite, in-place bearing replacement or repairs even in hard to reach areas.

Read more...
Stub shaft and sealing solutions on ash plant deliver five years of uninterrupted performance
SKF South Africa Motion Control & Drives
SKF South Africa’s stub shaft and sealing solutions, installed on ash plant SSC systems at two power stations, have delivered five years of uninterrupted performance.

Read more...
Smart, effortless precision bearing installation
SKF South Africa Motion Control & Drives
The SKF TMFT 36/PRO from SKF delivers a durable, fast and safe solution for professional bearing installation.

Read more...
Belt tension meter drives peak machinery performance
SKF South Africa Motion Control & Drives
SKF’s belt tension meter is engineered to transform belt tensioning into a process defined by accuracy, reliability and ease of use.

Read more...
Distance sensor for confined spaces
ifm - South Africa Sensors & Transducers
The O6D100 from ifm has been designed as a powerful all-rounder for typical applications in object detection, distance measurement and positioning.

Read more...
Long-range laser distance measuring sensor
Vepac Electronics Sensors & Transducers
The MS-100A is a long-range laser distance measuring sensor with a range of 150 to 1000 mm. This sensor excels in applications requiring extended measurement capabilities, such as quality control and logistics.

Read more...
Listening for damage to wind turbines
Sensors & Transducers
The Fraunhofer Institute for Integrated Circuits, working in concert with the Fraunhofer Institute for Wind Energy Systems, has developed a solution that can be used to identify cracks and breakage inside wind turbine blades remotely at an early stage.

Read more...
Advanced lubrication technology for paper producer
SKF South Africa Motion Control & Drives
SKF South Africa’s lubrication systems, powered by integrated state-of-the-art technology, are driving peak performance across the paper industry.

Read more...
SKF enhances mill reliability and efficiency
SKF South Africa Motion Control & Drives
SKF South Africa has integrated its advanced products, deep engineering know-how and specialised remanufacturing capabilities to deliver and install a new trunnion assembly on a horizontal grinding mill.

Read more...









While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.




© Technews Publishing (Pty) Ltd | All Rights Reserved