Switch Proximity
Todays deals on Switch Proximity?
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400x Proximity Switch Sensor 8mm detection NPN 18Diame $3,191.96 |
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Pepperl and Fuchs Proximity Switch CJ1-12GK-N-B48-04 $769.00 |
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ANELVA Bellows Cylinder 0 55 x 22 ST A13-02288-03A w/ Proximity Switch D-A57 $774.99 |
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PACK OF 15 NEW SMC D-Y7PWVSAPC AUTO SWITCH PROXIMITY SWITCHES $759.99 |
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AS-440-10U Keyence New In Box Proximity Switch & Amplifier AS44010U AH-422 AH422 $689.99 |
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Pepperl and Fuchs Proximity Switch CJ4-12GK-N-B50-4.00″ $642.00 |
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TURCK MODEL BI40-R32SR-UP6X PROXIMITY SWITCH 10-30VDC NEW CONDITION NO BOX $625.00 |
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ISE APPLETON APPLETON MLS-3EX LATCHING PROXIMITY SWITCH / LEVEL ALARM SPDT – NEW $609.00 |
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Connector Proximity Switch Sensor M18-3008NAT 50PCS $599.60 |
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Pre-wired Proximity Switch Sensor 8mm detection NPN 50x $555.55 |
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Balluff Inductive Proximity Switch BNS-816-804-PA-12-602 Limit -11 0546US New $549.95 |
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Pepperl and Fuchs Proximity Switch UJ750-30GK-13 $530.00 |
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SIEMENS 3RG6112-3CF00 SONAR-BERO PROXIMITY SWITCH 24VDC $499.90 |
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BALLUFF BES-515-449-BO-L PROXIMITY SWITCH LOT BES515449BOL $500.00 |
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HYDE PARK SM500A-000 SUPERPROX SENSOR PROXIMITY NEW $479.99 |
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10 x Siemens Proximity Switch Inductive 3RG4014-4AG01 $419.00 |
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10 x Siemens Proximity Switch Inductive 3RG4014-4AG01-Z $419.00 |
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Connector Proximity Switch Sensor M30-3015NAT 40 pcs $468.92 |
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TELEMECANIQUE XS7C40MP230H7 LIMIT SWITCH PROXIMITY $459.99 |
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Pre-wired Proximity Switch Sensor 4mm detection NPN 50x $455.55 |
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Pre-wired Proximity Switch Sensor 2mm detection NPN 50x $455.55 |
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40x Proximity Switch Sensor 15mm detection NPN 30 Diame $441.32 |
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40x Proximity Switch Sensor 10mm detection NPN 30Diame $441.32 |
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TURCK PROXIMITY SWITCH PN: Bi20R-W30-DAN6X-H1141 $425.00 |
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Allen Bradley Proximity Switch 871P-AC29N140-N3 30-150VAC 5-300mA 29mm (6179) $404.00 |
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Connector Proximity Switch Sensor M18-3005NAT 40 PCS $413.72 |
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Inductive Proximity Switch 5mm detection NPN 80pcs $411.64 |
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NIB PEPPERL + FUCHS Ultrasonic Sensor Proximity Sensor AC Switch Point Output $400.00 |
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BALLUFF BES 516-300-S308-S4-D BES516300S308S4D PROXIMITY SENSOR SWITCH 3 NEW $399.99 |
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NEW TURCK BI15M30AP6XH1141 PROXIMITY SWITCH INDUCTIVE $379.99 |
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40pcs Proximity Switch Sensor 8mm detection NPN 18Diame $386.12 |
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40x Proximity Switch Sensor 5mm detection NPN 18 Diame $386.12 |
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PEPPERL+ FUCHS PB1-004-6 PALM BUTTON PROXIMITY SWITCH NIB $385.99 |
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NEW SIEMENS Sonar Proximity switch PXS300 3RG6012-3AH00 $356.99 |
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F2LP-AK4 Omron New In Box Ring Proximity Switch Amplifier F2LPAK4 $329.99 |
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NEW SIEMENS (P+F) Sonar Proximity switch 3RG6233-3LS00 $327.99 |
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SIEMENS (P+F) Sonar-BERO proximity switch 3RG6233-3JS00 $327.99 |
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BALLUFF BES-516-356-DO-Z PROXIMITY SWITCH LOT BES516356DOZ $325.00 |
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Hyde Park SM556A-181 PROXIMITY SWITCH SUPERPROX CONNECT $322.49 |
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TURCK NI35 PROXIMITY SWITCH, LOT OF 5, NEW $300.00 |
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Namco Proximity Switch EE260-30420 (6074) $310.00 |
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CONTRINEX PROXIMITY SWITCH DW-AS-513-M12 (LOT OF 10)NEW $320.00 |
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LOT OF 2 NAMCO ET 120-32420 PROXIMITY SWITCH M18 20-250V (1638) $320.00 |
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Telemecanique XAD A605539H7 Inductive Proximity Switch $295.00 |
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BALLUFF BNS-519-D05-D12-100-10/D5 PROXIMITY SWITCH ***NIB*** $299.00 |
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Inductive Proximity Switch 5mm detection NPN 50pcs $313.33 |
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Inductive Proximity Switch 5mm detection NPN 50pcs $313.33 |
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1 NEW CCS 646DZE1 PROXIMITY SWITCH Q2-1 $299.99 |
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BALLUFF BNS519D12L1210010 PROXIMITY / INDUCTIVE SWITCH $300.00 |
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NEW BANNER PROXIMITY SWITCH RING MOD BI30RW30DAP6XH1141 $299.99 |
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NEW NAMCO INDUCTIVE PROXIMITY SWITCH 80-250 VAC MODEL ET120-32410 $299.99 |
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40x Proximity Switch Sensor 2mm detection NPN 12 Diame $303.32 |
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40x Proximity Switch Sensor 4mm detection NPN 12 Diame $303.32 |
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CC Technology Pro Flo TPSO Captured Proximity Switch $299.00 |
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NAMCO EE210-61344 PROXIMITY SWITCH CYLINDICATOR 10-30V QUANTITY!!! $240.00 |
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NAMCO EE210-68744 PROXIMITY SWITCH CYLINDICATOR 10-30V QUANTITY!! $240.00 |
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OSHKOSH TRUCK PROXIMITY SWITCH 59″ PART # 2CT212 NSN: 5930-01-212-7325 $300.00 |
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NIB Sick Photoelectric Proximity Switch WT24-R2201A01_WT24R2201A01_WT24-R22O1AO1 $299.00 |
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LOT OF 12 EFECTOR IG0307 PROXIMITY SWITCH *NEW* $295.00 |
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NIB GENERAL ELECTRIC CR115A1 VANE OPERATED PROXIMITY LIMIT SWITCH $295.00 |
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Namco Proximity Switch Cylindrical NO 3WDC EE210-18744 (6201) $285.00 |
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Pepperl and Fuchs Proximity Switch NJ15-30GKK-W3 $280.00 |
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ITE Siemens 3RG6014-3AD00 Sonar Proximity Switch M30 K1 SIMATIC PXS200 NEW $285.00 |
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NAMCO EE510-20100 PROXIMITY SWITCH 8-28VDC USED $275.00 |
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NEW SIEMENS Sonar-BERO proximity switch 3RG6233-3RS00 $280.99 |
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NAMCO EE230-33820 CYLINDICATOR PROXIMITY SWITCH 3000PSI ****XLNT**** $269.00 |
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Eaton Cutler Hammer Proximity Switch Base E51CLT26PU $275.00 |
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BALLUFF BNS519-D1R12-100-10 PROXIMITY SWITCH NNB $265.00 |
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10pcs Digital 5Digit LCD Punch Counter proximity switch + strongmagnetic+support $269.99 |
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Omron Proximity Switch E2K-X8MF1 (E2KX8MF1) NIB! $269.00 |
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Schneider Proximity Switch XSAV11801 NIB $210.00 |
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Turck Elektronik B12CRS260ADZ Proximity Switch $250.00 |
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SICK WL36-B230 OPTICAL PROXIMITY SENSOR, PHOTOELECTRIC, PHOTO SWITCH PHOTOSWITCH $260.00 |
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NEW ISSC 1217P-3 PROXIMITY LIMIT SWITCH SENSOR KANSON ELECTRONICS $249.00 |
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ALLEN BRADLEY 871U-X5A18 CYLINDRICAL INDUCTIVE PROXIMITY SWITCH NEW IN BOX $250.00 |
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NEW ALLEN BRADLEY 802PR-XBAM1-08 PROXIMITY LIMIT SWITCH $250.00 |
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E2CA-AN4D Omron New In Box Proximity Switch Amplifier E2CAAN4D $249.99 |
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NIB NEW VEEDER-ROOT 778534-611 PROXIMITY SWITCH (60) $250.00 |
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Schneider Proximity Switch XSAV11801 NIB $255.00 |
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Connector Proximity Switch Sensor M18-3008NAT 20PCS $254.83 |
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Pre-wired Proximity Switch Sensor 5mm detection NPN 20x $254.83 |
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Trabon Graco Lubriquip Inc527-007-110 Proximity Switch 4-pin 20-28vdc NEW $249.99 |
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Pepperl and Fuchs Proximity Switch NJ40-FP-E2 $242.40 |
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NAMCO EE510-72402 PROXIMITY SENSOR / SWITCH, 18mm M12 DIAMETER, 8mm RANGE, 3WDC, $250.00 |
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Topworx Go Proximity Limit Switch 74-13222-F2 High Temp $250.00 |
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Allen Bradley 802PR-LBAR1-08 Inductive Proximity Sensor Switch 802PRLBAR108 NEW $250.00 |
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BALLUFF PROXIMITY SWITCH BNS 519-B6-R08-40-11 *NEW* $250.00 |
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CUTLER HAMMER E51BLT5 PROXIMITY SWITCH SENSOR LIMIT NEW $249.99 |
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NEW TURCK INDUCTIVE PROXIMITY SWITCH MODEL BC10M30VN4X $238.99 |
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New Efector 100 Capacitive Proximity Switch KD0024 KDE2060-FBOA/NI/NPT $235.00 |
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TOPWORX 77-13528-DCA PROXIMITY LIMIT SWITCH 3 PIN $240.00 |
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Schneider Proximity Switch Part # XS612B1MAL2 $190.00 |
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Schneider Proximity Switch XSAV11801 NIB ! $243.00 |
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Lot of 7 Omron E2F-X5E1 Proximity Switch $210.00 |
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EFECTOR 100 PROXIMITY CAPACTIVE SENSOR SWITCH KD0012 $200.00 |
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Issc 9852-0068 PulsoTronic Proximity Switch Lot of 2 $240.00 |
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TURCK BI20R-W30-DAP6X-H1141 PROXIMITY SWITCH INDUCTIVE 10-30VDC 3WIRE DC PNP $239.99 |
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Allen Bradley 802PR-LBAA1 Inductive Proximity Sensor $239.95 |
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TURCK BI10R-W30-DAP6X-H1141 INDUCTIVE PROXIMITY SWITCH 14038 NEW CONDITION $238.00 |
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Pepperl and Fuchs Proximity Switch NJ15+U2+DW1-1 $228.00 |
Switch Proximity Questions
Proximity Sensor / Switch
A Proximity Sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic or electrostatic field, or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor’s target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor requires a metal target.
Proximity switches open or close an electrical circuit when they make contact with or come within a certain distance of an object. Proximity switches are most commonly used in manufacturing equipment, robotics, and security systems. There are four basic types of proximity switches: infrared, acoustic, capacitive, and inductive.
Infrared proximity switches work by sending out beams of invisible infrared light. A photo detector on the proximity switch detects any reflections of this light. These reflections allow infrared proximity switches to determine whether there is an object nearby. As proximity switches with just a light source and photodiode are susceptible to false readings due to background light, more complex switches modulate the transmitted light at a specific frequency and have receivers that only respond to that frequency. Even more complex proximity sensors are able to use the light reflected from an object to compute its distance from the sensor.
Acoustic proximity sensors are similar in principle to infrared models, but use sound instead of light. They use a transducer to transmit inaudible sound waves at various frequencies in a preset sequence, then measure the length of time the sound takes to hit a nearby object and return to a second transducer on the switch. Essentially, acoustic proximity sensors measure the time it takes for sound pulses to “echo” and use this measurement to calculate distance, just like sonar.
Capacitive proximity switches sense distance to objects by detecting changes in capacitance around it. A radio-frequency oscillator is connected to a metal plate. When the plate nears an object, the radio frequency changes, and the frequency detector sends a signal telling the switch to open or close. These proximity switches have the disadvantage of being more sensitive to objects that conduct electricity than to objects that do not.
Inductive proximity switches sense distance to objects by generating magnetic fields. They are similar in principle to metal detectors. A coil of wire is charged with electrical current, and an electronic circuit measures this current. If a metallic part gets close enough to the coil, the current will increase and the proximity switch will open or close accordingly. The chief disadvantage of inductive proximity switches is that they can only detect metallic objects.
Proximity switches are used in manufacturing processes for example, to measure the position of machine components. They are also used in security systems, in applications such as detecting the opening of a door, and in robotics, where they can monitor a robot or its components’ nearness to objects and steer it accordingly.
About the Author
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