Variohm Eurosensor - PRODUCT NEWS







APPLICATION NOTE: Wiring harnesses include glass encapsulated thermistors: Force Engineering choose Variohm for linear motor winding temperature monitoring

Force Engineering, based in Shepshed near Loughborough, develops and manufactures customised Linear Induction Motor (LIM) based motion systems, serving a wide base of industries with applications as diverse as medical scanning equipment and baggage handling conveyors.

As a world leading expert and innovator in the field of LIM technology, a large part of Force Engineering’s activities centres on the amusement ride industry - adding heightened levels for thrill-seekers through ride launch and in-ride acceleration to 1.2 g, and equally rapid braking performance along roller coaster tracks. To help ensure the extreme levels of electrical safety and performance required for these high power systems which typical run from very high current three-phase supplies, Force Engineering embed temperature controls in its LIM winding assemblies and has chosen Variohm EuroSensor as its main supplier of customised wiring harnesses that include glass encapsulated NTC thermistors configured as temperature probe assemblies.

The special temperature probes are similar to standard components available as stock items from Variohm EuroSensor, however with 10K3976 series thermistors which offer a higher temperature range and stability specification than the standard probe. With the NTC chip encapsulated in hermetically sealed glass packages, these thermistors - which are supplied to Variohm from TE Connectivity, the global sensor and measurement systems company - are in turn encapsulated and fully sealed in copper tube housings by Variohm EuroSensor at its Towcester manufacturing facility.


Variohm’s customised wiring harness with NTC sensors encapsulated in a tubular copper housing

The 10K3976 glass thermistor has a temperature range of -40 to +250 °C and is specified in applications where a fast time response is required at high levels of thermal shock. Three special probes are each wired with different length leadwires and coloured insulated, all finished with rubber shrink-sleeving. Additional cabling, without thermistors, is also included in the harness to facilitate straightforward assembly into the LIM’s manufactured by Force Engineering.


Variohm’s ETP-TP-SS series temperature probe – NTC or PT sensor encapsulated in a stainless steel housing

Whilst Variohm stocks and supplies a comprehensive range of glass or epoxy coated thermistors with NTC and PT sensors as components, the specialist sensor manufacturer has developed many standard products like the probes for Force Engineering as convenient assemblies that may be integrated directly into the customer’s application. These assemblies take the form of electrical ring terminals, hexagonal bolts and pipe clamps as well as cylindrical probes finished in PTFE, stainless steel, brass and other materials. These assemblies for instance help power amplifier manufacturers directly sense chassis or heatsink temperature through ring terminal probes. In this way the customer can overcome the potential problems of handling and installing tiny NTC or PT type temperature sensor, reduces components and suppliers from more streamlined production and reduces maintenance.



Variohm’s ETP series temperature probes – NTC or PT sensor encapsulated in hexagonal bolts, ring terminals and various materials as cylindrical tubes

In addition to specialist temperature probe assemblies, Variohm also includes customised production by transforming other components from its wide range of sensors for linear and rotary position, pressure, load/force, and vibration etc. Modifications can range from alternative electrical connection or a modified mounting arrangement to integrating sensors with significant redesigns or combining multiple sensor technologies and other electromechanical components as fully tested sub-assemblies.


About Variohm EuroSensor
Variohm EuroSensor is a manufacturer, distributor and supply chain partner providing complete sales and application support across a comprehensive range of position, force, pressure, load, and temperature sensor technologies - for demanding measurement applications across industry, construction, agriculture, motorsports, research and more.


About Variohm Holdings
Comprising four closely linked operating divisions, staffed by highly experienced motion and sensor application specialists with extensive knowledge of international standards; Variohm Holdings combines its considerable design and manufacturing capability with best of brand products and components from leading global partners to provide engineered solutions that are seamlessly and cost effectively integrated for your application.

For more information, please contact:-

Variohm-Eurosensor Ltd.
Tel: +44(0) 1327 351004
Fax: +44(0) 1327 353564
Email:
graham@variohm.com
Web:
www.variohm.com

March 2019

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