Robust optical fork sensors

August 2005 Sensors & Transducers

Telco has been in the competitive photoelectric market since 1982, proving its ability to keep ahead with its products. Its high-performance photoelectric system delivers reliable performance in demanding industrial environments, where contamination such as dust, dirt, grease, oil etc can prevent other similar photo eyes from working.

Telco is offering an extended range of fork sensors. These are based on the through beam principle, where a transmitter and receiver have to be placed opposite each other, ensuring that the light from the transmitter shines directly onto the receiver. An object is detected when it interrupts the light beam. Through beam mode is the most efficient use of photoelectric sensing energy offering the highest level of excess gain when required.

Fork sensors have the advantage that both the transmitter and receiver are built in to the same sturdy anodised aluminium housing, enabling both problem free adjustment and mounting. The solid structure ensures that they are all shock, vibration proof and IP67 sealed. The housings are available in various sizes with full gain and NC/NO adjustment through an internal potentiometer, PNP/NPN output with a supply voltage of 10 to 35 V d.c. high switching frequency of 4 kHz and a resolution of down to 0,4 mm, with a light immunity of up to 70 000 lux.

For more information contact Telco-Gail Norton Instrumentation, 031 701 4861.

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