One-piece photoelectric fork sensor solution
February 2002
Sensors & Transducers
Telco products continue to be a leading high performance photoelectric system within demanding industrial environments, where contamination such as dust, dirt, grease, oil etc can impose great demands on photoelectric sensors.
In order to meet the growing demand for high resolution and high speed, Telco have extended their product selection with the introduction of its new range of fork sensors - 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 into 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 10-35 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, all mean that these sensors live up to today's requirements.
The sensors are available with fork gap sizes: 2, 5, 10, 20, 30, 50, 80, 120, 205 and 220 mm. Shock and vibration proof, IP 67 Sealed, no alignment problem, high gain level, compact housing, high light immunity. Telco has been in the competitive photoelectric market since 1982. The picture shows the 2, 30 and 220 mm fork sensors.
Telco-Gail Norton Instrumentation
(031) 701 4861
telco.sa@hit.co.za
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