Sensors & Transducers


Compact proximity sensors with long sensing range

April 2001 Sensors & Transducers

Turck is offering its new Q25/Q30 compact inductive proximity sensors. These low-cost, long-range sensing devices can fit and function where standard size units may not. This unique combination of features makes these sensors a good solution for many general industry applications.

These one-piece, rectangular sensing devices, measuring 25,5 or 30,5 mm high by 25,0 or 30,0 mm wide by 38,5 or 52,5 mm deep, depending on model, achieve a 10 or 15 mm sensing range with repeatability greater than or equal to 2% of rated operating distance. Similar sized existing sensors typically offer sensing ranges of around 5 mm.

These nonflush sensors can be mounted in a position similar to flush sensors with no loss of range or degradation of hysteresis. Q25/Q30 three-wire DC, 10-30 V d.c. sensing devices include a highly visible LED that indicates 'output energised'. Both devices feature a normally-open PNP (sourcing) output and integral circuitry that protects against short-circuit, overload, wire-break and reverse polarity. Q25/Q30 sensors also feature a high switching frequency (500 Hz) vs the 150 Hz offered by most similar devices.

Designed for use in harsh environments, Q25/Q30 sensors feature a rugged plastic housing and are available with a potted-in 2 m PVC-jacketed cable or a 2 m pigtail-style quick disconnect. These sensors withstand washdown and operate in temperatures from -25 to +70°C. They are IEC IP67 rated.



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