World-class sensor manufacturer and supplier
Working principleof capacitance proximity switch
Capacitance proximity switch
* The induction surface of capacitance sensor is composed of two coaxial mental electctrodes, which from a capacitor and connected on RC oscillation circuit, just like an open capacitor electrode.
* When connecting to power supply, RC oscillator does not work. When an object is clos eto capacitor
electrode, the capacitor capacity will increase, and the oscillator will vibrate. Through the treatment of behind stage circuit, both signals of stop oscillation and oscillation will be converted to switch signs for checking the existence of object. this distance can be obtained, but to nonmetal object, the action distance is d etermined by material dielectric constant, the more dielectric constant, the more action distance will be obtained.
Outward appearance illustration
Features
2. High precision of repeated location
3. Diversified exterior structures
4. Good performance of anti-interference
5. Many output forms, Wide voltage range
6. Dust proof, vibration proof, water proof and oil proof
7. With short-circuit protection and inverted
8. Connecting protection
9. Long service life
Model explanation of proximity 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(C: 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)
Techique parameter
| Model NO. | Detection distance | Working voltage | Output | Flush | |
| Form | State | ||||
| CM34-3020NA | 0 -20mm | DC6-36V | NPN | NO | Non-flush |
| CM34-3020NB | 0 -20mm | DC6-36V | NPN | NC | Non-flush |
| CM34-3020NC | 0 -20mm | DC6-36V | NPN | NO+NC | Non-flush |
| CM34-3020PA | 0 -20mm | DC6-36V | PNP | NO | Non-flush |
| CM34-3020PB | 0 -20mm | DC6-36V | PNP | NC | Non-flush |
| CM34-3020PC | 0 -20mm | DC6-36V | PNP | NO+NC | Non-flush |
| CM34 -2020A | 0 -20mm | AC90-250V | SCR Control lable silicon | NO | Non-flush |
| CM34-2020B | 0 -20mm | AC90-250V | SCR Control lable silicon | NC | Non-flush |
Dimension
Application illustration
The dielectric constants for some important materials are as; osted as below
| Materials | Dielectric constant | Materials | Dielectric constant | Materials | Dielectric constant | Materials | Dielectric constant |
| Synthectic resin adhesive | 3.6 | Styrence | 3 | Alcohol | 25.8 | Polyvinyl | 2.9 |
| Mica | 6 | Prorcelain | 4.4 | Glass | 5 | Quartz glass | 3.7 |
| Ebonite | 4 | Petrolin | 2.2 | Cardboard | 4.5 | Silicon | 2.8 |
| Marble | 8 | Quartz sand | 4.5 | Cable rubber compound | 2.5 | ||
| Paper | 2.3 | Soft rubber | 2.5 | Gasoline | 2.2 | ||
| Organic glass | 3.2 | Water | 80 | Wood | 2.7 |
Packaging & Shipping
FAQ
Q 1. what's the payment term?
A. We accept TT,30% deposit and 70% balance agaisnt copy of BL
Q 2. how's the delivery time ?
A. usually it will take about 15 days for production
Q 3. tell me the standard of package?
A. Export standard carton box
Q 4.Could you offer Form A or C/O ?
A. It totally not a problem. We can prepare relative documents to forgin affairs office or other office to apply for this certificate.
Q 5.Would you accept to use our logo ?
A.If you have good quantity,it absolute no problem to do OEM.
Q 6.We want to know month capacity.
A. It depends on which model.For example for M12 type normal type, month capacity can reach near 20000pcs.
Q 7.Where is your market?
A. Our products are popular in Russia, Indonisia, Philippines,Italy, America, Brazil and so on.Some of them are our regular customers and some of them are developing. We hope you can join us and make mutural benifit from our cooperation.
Other product
About us
Yueqing Winston Electric Co., Ltd. is not only an exporting company, but also a professional manufacturer in China. We have our own production base. The products we professionally deal with are switching power supplies, sensors, relays, voltage stabilizers, AC contactors, circuit breakers, distribution boxes, industrial plugs & sockets and others. Since we are a manufacturer & exporter, we are sure that we can best support our customers with high quality products and the most competitive prices. Our company is located in Wenzhou - the Electric Capital of China. We specialize in developing, manufacturing and distributing low voltage & high voltage electrical products. We are an ISO9001:2000 certified company.
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