Page 2 - Combined_39_OCR

What's New in Proximity/Limit Switches? iiiiiiiiiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniitiiriiiiiiiiiiiiiiiiiiiiiiinii:

Measuring Shaft Programmable Rotary
Vibration Limit Switch
Non-contact proximity sensor measures Magnetic coupling actuates this solid­
radial vibration or axial position of ma­ state rotary limit switch. The machine-
chinery shafts and other ferrous or non­ Solid-State meunted transducer is electrically con­
ferrous metallic objects. Operating on Metal Sensing nected to a remote electronics package.
the eddy current principle, Model 5265 Limits are digitally dialed-in at the elec­
will sense a static change of position Miniature switch has unlimited opera­ tronics package in a matter of seconds.
or vibrations at frequencies up to KHz. tional cycles, repeatability is ±10% It is suitable as an input device to pro­
Motions as small as 40 microinches over a wide temperature range ( — 65 grammable controllers or it can be used
and up to 0.05 inch can be measured. to 4-180 F), and response is 3 ms for as a complete control package. Thumb­
Temperature range of the driver unit is rapid and highly repetitive operations. wheel switches or coded keys are used
— 20 to +65 C and of the probe is Model 8-210 offers a sensing distance to set the limits and no separate pro­
— 20 to 100 C. • Metrix Instrument of % inch in the standard version or gramming boxes are required. • Astro­
Co., Houston 1/10 inch in the precision version. It systems Inc., Lake Success, N. Y.
Mark 660 on Free Service Card also has momentary (60 seconds) Mark 664 on Free Service Card
short-circuit protection. • Eldec Corp.,
Lynnwood, Wash.
Mark 662 on Free Service Card

Adjustable Range
Optical Sensor
Infrared optical sensor transmits a Infrared
pulsed narrow-beam, and detects re­ Proximity Switch
flected light at ranges up to 60 inches
from noncooperative targets or 30 ft Self-contained switch has a range up to
from a retroreflector. It detects any 20 inches (50 cm). When used with a
object such as paper, plastic, liquid, or Coaxial Beam retroreflective target, the range is up
powder. Sensing distance is adjustable Photoelectric Control to' 20 ft (6 m). The infrared sensor
externally and is stabilized by a range responds to any surface or object en­
control. An LED transmits infrared Infrared LED photoelectric control has a tering its field of view, no matter what
light at a frequency of 10,000 pulses range of up to 35 ft (11 meters) using the material. Any number of sensors
per second. By using 10 nanosecond/ a single 3 inch retrotarget. Increasing can be interconnected for simultaneous
50 milliwatt (peak power) pulses, relia­ target size increases range. The adjust­ or sequential operation. A visible in­
bility is extended. The receiver fre­ able sensitivity feature permits simple dicator glows brightly when the sensor
quency is phase locked to the emitter setup for size of object to be detected. is aligned on target and permits visual
for synchronous operation and ambient The LED source and the photodetector monitoring during operation. • Control
light rejection. • Electronic Products for are on a common axis for maximum Equipment Div., Westinghouse Electric
Industry, Sunnyvale, Calif. control precision and sensitivity. The Corp., Beaver, Pa.
Mark 661 on Free Service Card invisible modulated beam is unaffected Mark 665 on Free Service Card
by sun, fog, dust, and other adverse
ambient conditions. • Scientific Tech­
nology Inc., Mountain View, Calif.
Mark 663 on Free Service Card

iiiiiiiUllliiiiiliiliiiiiiiiiiiiiiiiiitiiiiiiiiiiiiiiiiiiiiiuiiiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiu..............niiiiiiiiiiiiiiimi............................................................................................................................................................................................................................................ ...................................................I....... I.......iililllilliiiiiillillllllltllli.......
76 Automation—July 1974