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Switch manufacturer Contrinex is producing a range of miniature inductive and photoelectric sensors with standard, double and triple detection distances from devices as small as 4mm in diameter.

This comes in response to a requirement for very small sensors for precise detection of tiny objects.

Many small sensors have inadequately short detection distances and are therefore unable to be used to verify part presence reliably and consistently.

The 4mm-diameter sensor series has a very long 2.5mm sensing range that is up to three times longer than other sensors of this size.

It is suitable for installation in tight spaces and enables good working clearances from detected products.

Contrinex also now makes the smallest inductive sensor in the world at 3mm in diameter.

Despite being very small, these sensors have a 1mm sensing distance and still include short circuit, overload and inverse polarity protection, as well as an operation light-emitting diode (LED).

The tough stainless-steel housing and high-flexibility polyurethane cable make them appropriate for harsh operating conditions.

Often for a photoelectric detection solution, the only available option is to use fibre-optics linked with an amplifier, despite the fact that fibre failures can be the bane of manufacturing and frequently the cause of costly stoppages.

As an alternative, Contrinex’s miniature photoelectric sensors include high-performance 4mm diameter photoelectric sensors with diffuse or through-beam formats in short stainless-steel housings.

The initial cost of these compact photoelectric devices is less than a fibre and amplifier arrangement and there is no need to find a safe location to mount an amplifier.

In addition, the connecting cable of these self-contained discrete products can be turned through a much tighter radius than a fibre and they can, therefore, be more easily embedded and protected, whereas fibres remain vulnerable to snagging and breakages.

The diffuse sensors have a long 50mm sensing range and a through-beam set-up of 250mm.

Both of these long sensing distances are intended to help ensure reliable part detection in production environments.

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