| Magnetic |
| Magnetic Proximity Sensors SMC Series |
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WORKING PRINCIPLE
Magnetic proximity switches are made of reed contacts whose thin plates, trapped in a glass bulb together with inerted gas, are easily influenced by magnetic fields that create magnetic induction, opposite polarization. Magnetic attraction force makes thin plates flex and touch each other causing an electrical contact. The plate’s surface has been treated with a special material particularly suitable for low current or high inductive circuits. Magnetic sensors compared to traditional mechanical switches have the following advantage:
- Contacts are well protected against dust, oxidization and corrosion thanks to the hermetic glass bulb and inerted gas; contacts are activated by means of a magnetic field rather than mechanical parts.
- Special surface treatment of contacts assures in normal electrical conditions many of working cycles.
- Maintenance free, reduce encumbrance. The reed magnetic switches offer many electrical and mechanical characteristics together with various output functions.
- When in normally open (N.O.) mode the open reed contact closes as magnet approaches. They are supplied with two wires.
- When in the normally closed position (N.C.) the Redd contact, in rest position, opens as magnet gets closer. These models are created by using exchanging reed contacts in which N.O. output has been excluded. They are supplied with two wires. |
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Specifications
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MODEL NO |
SMC06 NO
$15.95 Add to Cart
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SMC08 NO
$17.85 Add to Cart
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SMC10 NO
$18.4 Add to Cart
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SMC12 NO
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CHANGEOVER MODEL NO/NC |
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SMC06 S
$19.1 Add to Cart
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SMC08 S
$28 Add to Cart
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SMC10 S
$28.9 Add to Cart
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SMC12 S
$29.25 Add to Cart
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Max switching voltage V |
220 |
150 |
220 |
150 |
220 |
150 |
220150
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Max switching current A |
0.5 |
1 |
0.5 |
1 |
0.5 |
1 |
0.51
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Max switching power W/VA |
10 |
20 |
10 |
20 |
10 |
20 |
1020
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Max switching frequency* Hz |
230 |
250 |
230 |
250 |
230 |
250 |
230250
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Contact actuation time ms |
2 |
2 |
2 |
2
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Repeatability mm |
± 0.3 --->
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Temperature limits °C |
- 25 ÷ + 100 --->
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IP rating (IP) |
67 --->
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Housing |
Nickelled brass --->
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Cable 2 metres length |
2x0.14 |
3x0.14 |
2x0.25 |
3x0.14 |
2x0.25 |
3x0.25 |
2x0.253x0.25 |
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Specifications
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MODEL NO |
SMP302 NO
$26.25 Add to Cart
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SMP304 NO
$21.9 Add to Cart
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SMC09PG NO
$22.25 Add to Cart
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CHANGEOVER MODEL NO/NC |
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SMP302 S
$26.25 Add to Cart
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SMP304 S
$30.8 Add to Cart
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SMC09PG S
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Max switching voltage V |
220 |
150 |
220 |
150 |
220150
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ds
Max switching current A |
0.5 |
1 |
0.5 |
1 |
0.51
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Max switching power W/VA |
10 |
20 |
10 |
20 |
1020
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Max switching frequency* Hz |
230 |
250 |
230 |
250 |
230250
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Contact actuation time ms |
2 |
2 |
2
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Repeatability mm |
± 0.3 --->
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Temperature limits °C |
- 25 ÷ + 100 --->
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IP rating (IP) |
67 --->
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Housing |
Plastic --->
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Cable 2 metres length |
2x0.25 |
3x0.14 |
2x0.25 |
3x0.14 |
2x0.503x0.35dd |
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Specifications
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MODEL NO |
SMC12LM NO
$36.25 Add to Cart
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SMC18M NO
$38.35 Add to Cart
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SMC09PGM NO
$42.9 Add to Cart
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CHANGEOVER MODEL NO/NC |
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SMC12LM S
$43.4 Add to Cart
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SMC18M S
$57.05 Add to Cart
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SMC09PGM S
$47.25 Add to Cart
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Max switching voltage V |
400 |
500 |
400 |
500 |
400500
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Max switching current A |
3 |
0.5 |
3 |
0.5 |
30.5
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Max switching power W/VA |
100 |
30 |
100 |
30 |
10030
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Max switching frequency* Hz |
150 |
150 |
150
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Contact actuation time ms |
4.5 |
4.5 |
4.5
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Repeatability mm |
± 0.3 --->
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Temperature limits °C |
- 25 ÷ + 100 --->
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IP rating (IP) |
67 --->
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Housing |
Nickelled brass --->
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Cable 2 metres length |
2x0.50 |
3x0.25 |
2x0.50 |
3x0.35 |
2x0.503x0.35 |
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EXAMPLE OF FUNCTIONING |
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SWITCHING POWER DIAGRAMS |
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Voltage (V), switching current (I) and max. power (P) mean the max. switching istantaneous value in presence of loads. When choosing a type of contact it is recommended that the following formula be applied: P = V x I.
For magnetic sensors which have different technical data from shown standard ones and for the switching of inductive or capacitive loads our technical department is always at your disposal.
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The table to the right states 2 distance values (D/C) in mm. D indicates the sensing distance, C indicates the min. hysteresis value, under this value the contact switches off (see example of functioning). Data shown on the above table have an approximate value, referred to appliances which are not ferromagnetic and with magnet for frontal working. The magnetic sensors can also work with a lateral magnet. In case of setting-up on ferrous surfaces which scatter the magnetic flux, it is necessary to interpose suitable spacers made of non-magnetic metal. |
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SENSORS AND MAGNETS SENSING DISTANCE |
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SENSOR |
REED |
M16 |
M20 |
M30 |
M300 |
M302M304
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SMC-06/08/10/12/09PG |
NO |
8/2 |
20/4 |
40/5 |
30/4 |
--
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SMC-06/08/10/12/09PG |
CHANGEOVER |
6/3 |
17/3 |
33/5 |
23/5 |
--
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SMC-12LM/18M/09PGM |
NO |
- |
10/6 |
33/10 |
18/8 |
--
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SMC-12LM/18M/09PGM |
CHANGEOVER |
- |
10/6 |
30/10 |
18/8 |
--
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SMP-302/304 |
NO |
- |
- |
- |
- |
10/410/4
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SMP-302/304 |
CHANGEOVER |
- |
- |
- |
- |
10/410/4 |
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IDENTIFICATION REFERENCE |
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WIRING DIAGRAMS |
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MAGNETIC SENSORS DIMENSIONS / DESCRIPTIONS |
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SMC-06 Smooth cylindrical body 6mm dia. nickel plated brass. Standard reed contact normally open or changeover
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SMC-08 Threaded cylindrical body dia. 8 x 1 mm nickel plated brass, complete with locknuts. Standard reed contact normally open or chang | | |
