Principle of inductive proximity switch
Inductive proximity switch is composed of three parts:oscillator,switch circuit and magnified output circuit.
The oscillator  will generate an alternating electric field. When  the metal object approaches this electric field
and reaches the induction distance, whirlpool will generate in metal object, resulting in attenuation of vibration
and then stop. The changes of vibration and stop of oscillator is treated by behind stage magnified circuit and
converted to switching sign, triggering driving control for non- contact detection.
Compact volume
High precious of repeated location
Diversified exterior structures
Good performance of anti-interference
Many output forms
High ON-OFF frequency
Wide voltage range
Dust proof,vibration proof,water proof,oil proof
With short-circuit protection and inverted conecting protection
Long service life
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Application
Various location detection of machinery process center
Stopper detection of grinding machine
Arm location detection of robot
Bottle lid detection
Inspection of the existing of milk inside the paper package
Spacing detection
Inductive Proximity Switch
DC switch should adopt insulation transformer and ensure stable voltage mains corrugation.
If any electric power line or dynamic line passes through the surrounding of switch lead-wire, in order to prevent
the switch  from damage or error action, cover the metal bushing on the switch lead-wire and ground it to the earth.
Set the switch use distance within the rated distance to avoid the effectc from temperature and voltage.
Wiring while power-on is strictly prohibited. Connecting the wires strictly according to the wiring diagram and
   output return elementary diagram.
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Model explanation of proximity sensor switch  |
| 1. Switch category(LM: inductance type; CM: capactitance type;SM:Hall type; AM:safety explosion-proof type; XM: mimic linear type) 2. Outward appearance code(: Cylinder type; F: Angular column type and planeinstallation type) 3. Operating voltage(30: 6-36VDC; 310: 5-24VDC; 320: 12-60VDC; 20:90-250VAC; 210: 24-250VAC;220: 380VAC; 40: 12-240VDC/24-240AC; 50: Special voltage) 4. Detection distance( 01: 1mm; 05:5mm; 10:10mm) 5. Output method (N: Three-line DC NPN output;P: Three-line DC PNP output; L: Two-line DC output;: AC two-wire output;J: Relay output;NP: NPN+PNP output) 6. Output status(A: NO; B: NC; C: NO+NC; MU: Mimic voltage; MI: Mimic current) 7. Auxi function code(T: With connector; Y: Water proof, oil proof; I: Special requirement; H: High temp resistance; R: Ring type) |
| Main features: |
| Compact volume high precision of repeated location Diversified exterior structures Good performance of anti-interference. Many output forms High on-off frequency. Wide voltage range Dust proof,vibration proof,water proof and oil proof. With short-circuit protection and inverted connecting protection. Long service life |
No. |
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1 |
Switch category |
LM: inductance type, CM: capacitance type, SM: hall type, AM: safety explosion-proof type, XM: mimic linear type, HM: reed type |
2 |
Outward appearance code |
(Blank): cylinder type; F: angular column type and plane installation type |
3 |
Diameter |
Diameter of sensor |
4 |
Working voltage |
30: 6-36VDC; 310: 5-24VDC; 320: 12-60VDC; 20: 90-250VAC; 210: 24-250VAC; 220: 380VAC; 5: Special voltage |
5 |
Detection distance |
01: 1mm; 05: 5mm, 10: 10mm and etc. |
6 |
Output form |
N: three wire DC NPN transistor output P: three wire DC PNP transistor output : AC two-wire output J: relay contact output NP: four-wire NPN+PNP double output (NOTE: when you order NP type output form, the output state can be or NO(A), or NC(B), can't be NO+NC(C). |
7 |
Output state |
A: Normally open NO B: Normally close NC MU: mimic voltage MI: mimic current |
8 |
Subsidiary |
T: angle connector+wire (with angle aviation connector) T3: direct connector+wire (with direct aviation connector) Y: water proof, oil proof I: special requirement H: high temperature resistance R: ring type |
Explanation of technical terms
Series connection and parallel connection
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For your information, as to the same size sensor, we have three types:Â
1, pre-wire type, such as LM8-3001PA
2, connector type, such as LM8-3001PC C ( "C" means male connector type)
3, connector type+connector wire (with aviation connector type) LM8-3001PAT ( "T" means angle connector+wire, T3 means direct connector+wire)Â
As the prices for 1 and 2 types are the same, we just put one code LM8-3001PA to represent them. When customer order, they should tell us which type pre-wire or connector type they need. In future order, you can add "C" at the end of the codes, then we know you need connector types.
LM12 and LM14 dimensions:
Structural category |
Cylinder type |
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Outward appearance code |
LM6 |
LM8 |
LM12 |
LM14 |
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Outward appearance illustration |
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Overall dimensions |
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    Flush |
Detection distance |
1mm |
1mm |
2mm |
3mm |
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NPN |
NO |
LM6-3001NA |
LM8-3001NA |
LM12-3002NA |
LM14-3003NA |
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NC |
LM6-3001NB |
LM8-3001NB |
LM12-3002NB |
LM14-3003NB |
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NO+NC |
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LM12-3002NC |
LM14-3003NC |
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PNP |
NO |
LM6-3001PA |
LM8-3001PA |
LM12-3002PA |
LM14-3003PA |
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NC |
LM6-3001PB |
LM8-3001PB |
LM12-3002PB |
LM14-3003PB |
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NO+NC |
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LM12-3002PC |
LM14-3003PC |
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two wire |
NO |
LM6-3001LA |
LM8-3001LA |
LM12-3002LA |
LM14-3003LA |
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NC |
LM6-3001LB |
LM8-3001LB |
LM12-3002LB |
LM14-3003LB |
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SCR |
NO |
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LM12-2002A |
LM14-2003A |
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NC |
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LM12-2002B |
LM14-2003B |
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NO+NC |
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Relay output |
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   N0n-flush |
Detection distance |
1.5mm |
1.5mm |
4mm |
5mm |
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NPN |
NO |
LM6-3002NA |
LM8-3002NA |
LM12-3004NA |
LM14-3005NA |
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NC |
LM6-3002NB |
LM8-3002NB |
LM12-3004NB |
LM14-3005NB |
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NO+NC |
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LM12-3004NC |
LM14-3005NC |
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PNP |
NO |
LM6-3002PA |
LM8-3002PA |
LM12-3004PA |
LM14-3005PA |
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NC |
LM6-3002PB |
LM8-3002PB |
LM12-3004PB |
LM14-3005PB |
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NO+NC |
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LM12-3004PC |
LM14-3005PC |
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NO |
LM6-3002LA |
LM8-3002LA |
LM12-3004LA |
LM14-3005LA |
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NC |
LM6-3002LB |
LM8-3002LB |
LM12-3004LB |
LM14-3005LB |
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SCR |
NO |
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LM8-2002A |
LM12-2004A |
LM14-2005A |
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NC |
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LM12-2004B |
LM14-2005B |
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NO+NC |
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Capacitor Motor,Furnace Capacitor,Start Capacitor,Capacitor Start Motor Wentelon Micro-Motor Co.,Ltd. , https://www.wentelon.com | |||||||