Capacitive, Magnetic and Piezo Switches

Capacitive, Magnetic, and Piezo Switches are types of electronic switches that operate based on different principles. Let's explore each of them:

  1. Capacitive Switches: Capacitive switches use the principle of capacitance to detect touch or proximity. They typically have a touch-sensitive surface that acts as one plate of a capacitor, while the other plate is usually a ground plane or a separate electrode. When a conductive object, such as a finger, comes close to or touches the touch-sensitive surface, it changes the capacitance, which is then detected by the switch's electronics. Capacitive switches are commonly used in touchscreens, touch-sensitive buttons, and proximity sensors.
  2. Magnetic Switches: Magnetic switches, also known as magnetic reed switches, use the presence or absence of a magnetic field to control the switch's operation. They consist of two metal reeds that are hermetically sealed within a glass tube. Each reed contains magnetically sensitive material. When a magnetic field is applied near the switch, the reeds are attracted to each other, and the switch closes, allowing current to flow. When the magnetic field is removed, the reeds separate, and the switch opens. Magnetic switches are often used in applications such as security systems, door and window sensors, and proximity sensors.
  3. Piezo Switches: Piezo switches utilize the piezoelectric effect to convert mechanical stress or pressure into an electrical signal. They consist of a piezoelectric material, such as certain crystals or ceramics, that generates an electric charge when subjected to mechanical deformation. When pressure or force is applied to the switch, it causes the piezoelectric material to deform, generating an electrical signal. This signal can be used to trigger a switching action. Piezo switches are commonly found in applications where a robust and reliable switch is required, such as industrial control panels, medical equipment, and automotive applications.

Each type of switch has its own advantages and limitations. Capacitive switches offer touch-sensitive and non-mechanical operation but may be affected by moisture or dirt. Magnetic switches are highly reliable and can operate in harsh environments but require the presence of a magnetic field. Piezo switches are durable and can withstand high forces, but they require mechanical pressure to operate and are typically more expensive.

Capacitive Switches
Capacitive Switches
Hall Effect Switches
Hall Effect Switches
Piezo Switches
Piezo Switches
Reed Switch Magnets
Reed Switch Magnets
Reed Switches
Reed Switches
Thumbwheel Switches
Thumbwheel Switches

1019 Products showing for Capacitive, Magnetic and Piezo Switches

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In Stock
EAO Capacitive switch Latching NO Illuminated, Red, Green, IO-Link, IP69K
  • RS Stock No. 227-0850
  • Mfr. Part No. 84-ASKS-C18-04A8
Subtotal (1 unit)
MYR413.71
MYR413.71/unit
In Stock
EAO Capacitive switch Latching NO Illuminated, Green, Red, IO-Link, IP69K
  • RS Stock No. 227-0851
  • Mfr. Part No. 84-ASKS-C19-04A9
Subtotal (1 unit)
MYR413.71
MYR413.71/unit
Last RS stock
DiodesZetex Hall Effect Sensor 4 mA 50 mA Through Hole Linear Maintained, 105 °C, -40 °C, 8V dc, 3 V dc
  • RS Stock No. 246-7403
  • Mfr. Part No. AH49FZ3-G1
Subtotal (1 pack of 10 units)
MYR27.36
MYR2.736/unit
In Stock
Assemtech SPST PCB Reed Switch 500 mA 200 V
  • RS Stock No. 909-2584
  • Mfr. Part No. RI-03A
Subtotal (1 bag of 10 units)
MYR41.50
MYR4.15/unit
In Stock
RS PRO SPCO Through Hole Reed Switch 500 mA 170 V
  • RS Stock No. 265-2236
Subtotal (1 pack of 5 units)
MYR75.29
MYR15.058/unit
Currently unavailable
Banner Capacitive switch Momentary NO Illuminated, Green, Yellow, Red, PNP, IP67
  • RS Stock No. 285-938
  • Mfr. Part No. K50APTGRYF2Q
Subtotal (1 unit)
MYR1,144.75
MYR1,144.75/unit
Stocked by manufacturer
Banner Capacitive switch NO Momentary or Latching Touch Button Output Illuminated, RGB, NPN/PNP, IP69K, IP67, IP66
  • RS Stock No. 294-102
  • Mfr. Part No. S22AMTSGRHQ
Subtotal (1 unit)
MYR487.29
MYR487.29/unit
Stocked by manufacturer
Banner Capacitive switch Latching NO Illuminated, Red, Green, Bipolar, IP69K, IP67 Polycarbonate
  • RS Stock No. 294-265
  • Mfr. Part No. K50ALBTRGHQ
Subtotal (1 unit)
MYR1,006.27
MYR1,006.27/unit
Stocked by manufacturer
Banner Capacitive switch Momentary NO, Solid State, IP66
  • RS Stock No. 331-375
  • Mfr. Part No. OTBA5LQD
Subtotal (1 unit)
MYR999.95
MYR999.95/unit
Stocked by manufacturer
Banner Capacitive switch Momentary NO Illuminated, Green, Bipolar, IP69K, IP67 Polycarbonate
  • RS Stock No. 294-262
  • Mfr. Part No. K50ABT2XGHQ
Subtotal (1 unit)
MYR1,006.27
MYR1,006.27/unit
Stocked by manufacturer
Banner Capacitive switch Momentary NO Illuminated, Green, Bipolar, IP69K, IP67 Polycarbonate
  • RS Stock No. 294-288
  • Mfr. Part No. K50CABT2XGHQ
Subtotal (1 unit)
MYR1,006.27
MYR1,006.27/unit
In Stock
EAO Capacitive switch Latching NO Illuminated, Green, Red, IO-Link, IP69K
  • RS Stock No. 227-0843
  • Mfr. Part No. 84-ASKS-B11-049D
Subtotal (1 unit)
MYR366.92
MYR366.92/unit
In Stock
Assemtech SPCO PCB Reed Switch 200 mA 30 V ac/dc
  • RS Stock No. 362-2568
  • Mfr. Part No. 8602-0551-020
Subtotal (1 unit)
MYR27.71
MYR27.71/unit
Currently unavailable
ifm electronic Capacitive switch
  • RS Stock No. 810-0195
  • Mfr. Part No. E12377
Subtotal (1 unit)
MYR54.91
MYR54.91/unit
Limited stock
Cynergy3 SPST PCB Reed Switch 100 mA 24 V ac/dc
  • RS Stock No. 229-3664
  • Mfr. Part No. TRA211G/15-20
Subtotal (1 unit)
MYR38.39
MYR38.39/unit
Stocked by manufacturer
Banner Capacitive switch Momentary Manual Illuminated, Red, Green, PNP, IP69K Polycarbonate
  • RS Stock No. 295-183
  • Mfr. Part No. K50APT2GREQ
Subtotal (1 unit)
MYR1,157.52
MYR1,157.52/unit
Temporarily out of stock
KEMET SPST Through Hole Reed Switch 300 mA 110 V ac/dc
  • RS Stock No. 188-1074
  • Mfr. Part No. OHD3-125M
Subtotal (1 unit)
MYR32.83
MYR32.83/unit
Temporarily out of stock
KEMET SPST Through Hole Reed Switch 300 mA 110 V ac/dc
  • RS Stock No. 188-0843
  • Mfr. Part No. OHD1-80M
Subtotal (1 unit)
MYR31.35
MYR31.35/unit
In Stock
Cynergy3 1 NO Surface Reed Switch 1.3 A 250 V
  • RS Stock No. 283-5748
  • Mfr. Part No. DRA200G/80-90
Subtotal (1 unit)
MYR59.68
MYR59.68/unit
In Stock
RS PRO Illuminated Piezo Switch, Momentary, IP68, 1A, 65 °C, -20 °C
  • RS Stock No. 175-9553
Subtotal (1 pack of 1 unit)
MYR245.03
MYR245.03/pack
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