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973CP15TM-B11T-L PDF预览

973CP15TM-B11T-L

更新时间: 2024-11-10 23:26:23
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Industrial Control IC

973CP15TM-B11T-L 数据手册

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Proximity Sensors  
972/973CP Series  
Capacitive Proximity Sensors  
FEATURES  
Sensitivity adjustment is standard, allowing  
fine tuning to specific applications, the key  
to ‘‘seeing through’’ an object or material in  
order to sense another. The dielectric con-  
stant must be very low for material being  
‘‘seen through’’.  
Shielded sensors are used when a path to  
ground does not always exist. By incorpo-  
ratingthegroundelectrodeinthesensor, an  
electric field is created independently of any  
outside path to ground. The field functions  
the same as when the electrodes face each  
other. The shielded sensor can sense any  
material, grounded or ungrounded. Shield-  
ed sensors may be flush mounted in any  
solid material.  
ɀ Senses all materials  
ɀ Threaded 18 mm diameter metal  
housings  
ɀ Threaded 30 mm diameter metal and  
plastic housings  
ɀ Sealed to IP 65 and IP 67 for industrial  
environments  
ɀ Shielded and unshielded sensing  
ɀ Electrical options:  
– 10-48 VDC 3-wire sensors provide  
current sinking or current sourcing  
operation  
– 90-250 VAC 2-wire sensors operate on  
line voltage and are as easy to wire as  
mechanical switches  
CAPACITIVE SENSOR TYPES  
UNSHIELDED (Plastic body)  
ɀ Primarily used to detect conductive type  
materials (metal, water) at maximum  
distances. When detecting non-  
conductive materials, a path to ground  
is required.  
ɀ Designed to sense conductive materials  
through a non-conductive material (i.e.,  
water in a glass or plastic container).  
NOTE: Capacitance sensors will not see  
through metal or a material thicker than the  
specified sensing range.  
Accessories for capacitive sensors include  
mounting brackets. See page B101.  
ɀ Self-contained – no separate amplifier  
needed  
Conductive and non-conductive materials  
cause an increase in capacitance due to a  
dielectric change in comparison to air. The  
ground electrode is located directly across  
fromthemainelectrode.Thisisnotmechan-  
ically required, as a path to ground will ac-  
complish the same thing.  
TYPICAL APPLICATIONS  
ɀ Fill level detection in tanks  
ɀ Package inspection for product content  
ɀ Sense liquid level in sight glass or bottle  
ɀ Detect powder or granular material in a  
hopper  
ɀ Detect non-metallic objects on conveyor  
belts  
Unshielded sensors are often used for  
‘‘looking through’’ a non-conductive materi-  
al to control the level of a conductive materi-  
al. An example is a plastic section in a tank  
drain pipe to indicate when tank is empty.  
MICROSWITCH900Seriescapacitiveprox-  
imity sensors detect targets made of glass  
or grain, paper, wood or water.  
SHIELDED (metal body)  
These sensors utilize an oscillating electric  
field which is sensitive to both non-conduc-  
tive materials (glass, plastic, rubber, oil)  
and conductive materials such as metals  
and water. This flexibility adds solid state  
sensing reliability to many packaging and  
process control functions.  
ɀ General purpose to sense non-  
conductive type materials (wood,  
plastic, cardboard, glass).  
ɀ Do not use in applications where  
condensing humidity could cause water  
droplets to form on the face of the  
shielded capacitive sensor. Water  
droplets on the face will cause the  
output to lock on.  
Metal housings are available in 18 and 30  
mm diameters. Shielded versions allow op-  
timum sensing of non-conductive materials, ɀ Used when mounting considerations  
including the ability to sense longer range  
than certain inductive devices.  
such as flush mounting and surrounding  
metals could impact the operation of the  
sensor.  
Plastic 30 mm housings are for conductive  
liquids. Review application information on  
pages B124 and B125 for more information.  
B76  
Honeywell ɀ MICRO SWITCH Sensing and Control ɀ1-800-537-6945 USA ɀ ⍣1-815-235-6847 International ɀ1-800-737-3360 Canada  

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