Cases & enclosures
against impact, as well as moisture and dust ingress,” explains TEL’s Anthony Boyd.
DURABLE POLYCARBONATE The company primarily uses a combination of Spelsberg TK and TG enclosures, constructed from highly durable polycarbonate, that provide lasting protection to the electronics housed within. As well as meeting electrical conformance, Spelsberg’s boxes also achieve UL marking, crucial to TEL’s US market. Another key benefit of polycarbonate construction is the ability to rapidly customise the enclosures. Spelsberg’s housings are used across 14 different TEL products, each of which has distinct PCB connection requirements. This not only requires flexibility over specific terminal
connections for each controller design, but its corresponding enclosure also needs to allow specific cable routing. As well as a mains power cable, the PCB requires various communications and I/O cables that need entry/exit points designed into the enclosure. Spelsberg UK, based in Telford, Shropshire, achieves all required CNC customisation with an in-house team. The CNC engineers can issue bespoke designs as required, or they can program cutting and drilling according to customer-issued CAD drawings. For any new design, Spelsberg typically provides a prototype within five working days. Scaling up production, the company delivers 300 to 500 CNC customised enclosures to TEL each month.
QUALITY FINISH Although every controller’s capabilities are centred around its PCB, the main point of physical and visual contact for the user is the enclosure. As the company’s control products are commonly installed within laboratories and settings such as pharmaceutical production facilities, it is crucial for the housing to have a clean and modern design. “The finish of the enclosures is the right kind of design our products need for our target market,” says Boyd. “The boxes have clean lines, and they demonstrate durability. As we use Spelsberg enclosures throughout our range of
Instrumentation Monthly June 2024
airflow monitoring and control systems, the uniformity they have, across various sizes and models, is also important to us.” Fume cupboard manufacturers are TEL’s core market, both in the UK and across the globe, especially in the US and India. Requiring a regular, high-volume supply of products that are dependable for use in the field, this makes Spelsberg a key supplier for TEL’s strategic plans. “The range and uniform quality of the enclosures, along with the CNC machining to suit our individual products, means Spelsberg continues to be a key factor in our overall product quality,” Anthony confirms.
Spelsberg
www.spelsberg.co.uk
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