Contact Us
Contact Us Stock Check

Form B - Normally-Closed |

A normally closed (SPST-N.C.) or Form B reed sensor represent the state of contacts before any magnetic field is applied to them in which they exist in the closed state. To open the contacts a magnet of opposite polarity is brought into the existing magnetic field cancelling the field from the existing permanent magnet. This in turn opens the contacts. The magnet must be carefully chosen so that its strength is strong enough to cancel the field from the permanent magnet, but not too strong that it overpowers the permanent magnets field, which could re-close the contacts. Furthermore, care must be taken in selecting the physical operate and release points. Knowing where these 3 magnetic lobes are is essential for proper sensor operation. Check out these animated Magnet Interaction examples showing the reed switches in their sensing environment.

Parametric Search

MK24 Reed Sensor Dimensions

Ultraminiature surface mount (SMD) MK24 series reed sensor used in On/Off control switch, proximity, motion, position detection with optional Form B (SPST-N.C.) contact form. Supplied in tape and reel according to IEC 286/part 3. Axial or gull-wing lead designs available. UL Approval

UL Certificate of Compliance

MK15 Reed Sensor

Normally closed (SPST-N.O.) surface mount (SMD) MK15 Series Reed Sensor used in On/Off control switch, proximity, motion, position detection. Supplied in tape and reel according to IEC 286/part 3. Axial or gull-wing lead, high power switch. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK01 Reed Sensor

SPDT Changeover surface mount (SMD) MK01 Series Reed Sensor used in On/Off control switch, proximity, motion, position detection with high power switch option. Supplied in tape and reel according to IEC 286/part 3. UL Approval

UL Certificate of Compliance

MK14 Reed Sensor

Panel mount (4.0mm) MK14 Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK03 Reed Sensor

Panel mount (5.75mm) MK03 Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK08 Reed Sensor

ATEX & IECEx approved (intrinsically safe) panel mount MK08 Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals. Optional internal switch, cable, length, and termination. Oil resistant wire, operate -40°C to +130°C. Certified to operate in hazardous locations or potentially explosive environments. KEMA 00ATEX1112 X, IECEx KEM09.0006 X


Type of protection: II 2 GD Ex mb II T6
II 2 GD Ex tD A21 IP65 T85 °C
In accordance with: IEC/EN 60079-0, IEC/EN 60079-18, IEC/EN 61241-0, IEC/EN 61241-1

ATEX Examination Certificate

ATEX Declaration of Conformity

IECEx Certificate of Conformity

Mounting Instructions for MK08

UL Certificate of Compliance (MKxxU *Series followed by U)


 

MK11 Stainless Steel Reed Sensor

M5/M8 adjustable thread mount MK11 Stainless Steel Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals. Used in position, level, and end limit detection w/convenient sensing adjustment. Optional internal switch, cable, length, and termination. UL Approval, IP67 Rated

UL Certificate of Compliance (MKxxU *Series followed by U)

MK11 Plastic Reed Sensor

M8 adjustable thread mount MK11 Plastic Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals with optional high voltage switch. Used in position, level, and end limit detection w/convenient sensing adjustment. Optional internal switch, cable, length, and termination. UL Approval, IP67 Rated

UL Certificate of Compliance (MKxx/MxU *Series followed by U)

MK11Brass Reed Sensor

M6, M8, M10 and M12 adjustable thread mount MK11 Brass Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals with optional high voltage switch. Used in position, level, and end limit detection w/convenient sensing adjustment. Optional internal switch, cable, length, and termination. UL Approval, IP67 Rated

UL Certificate of Compliance (MKxx/BxU *Series followed by U)

MK07 Reed Sensor

Plastic M8 adjustable thread mount MK07 Series Reed Sensor are supplied in a cylindrically shaped housing with cable terminals. Used in position, level, and end limit detection w/convenient sensing adjustment. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK02 Reed Sensor

Ferrous metal detection screw fastened flange mount MK02 Series Reed Sensor in a rectangular housing with cable terminals. Front or above operation. UL Approval, IP67 Rated

UL Certificate of Compliance (MKxx/xU *Series followed by U)

MK28 Reed Sensor

Magnetically conductive vane operated screw fastened MK28 Series Reed Sensor with cable terminals is ideal in harsh environments.

MK04 Reed Sensor Dimensions

Best value screw fastened flange mount MK04 Series Reed Sensor in a rectangular housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK05 Reed Sensor

Best value screw fastened flange mount MK05 Series Reed Sensor in a rectangular housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK13 Reed Sensor

Best value screw fastened flange mount MK13 Series Reed Sensor in a rectangular housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Optional internal switch, cable, length, and termination. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK26 Reed Sensor

High voltage screw fastened flange mount MK26 Series Reed Sensor in a rectangular housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Optional internal switch, cable, length, and termination. IP67 Rated

MK21P, MK21M Reed Sensor

High temperature resistant screw fastened flange mount MK21P, MK21M Series Reed Sensor in a rectangular housing with cable terminals. Used in position, level, and end limit sensing. Molded (M) version for high temperature resistance up to +150°C. Optional internal switch, cable, length, and termination. UL Approval, IP67 Rated

UL Certificate of Compliance (MKxxU *Series followed by U)

MK27 Reed Sensor

High voltage aluminum screw fastened flange mount MK27 Series Reed Sensor in a rectangular housing with cable terminals. Ideal in harsh environments for proximity, position, motion, and end limit detection. Sensing distance up to 40mm, magnet included. Optional internal switch, cable, length, and termination. IP67 Rated

MK06 Reed Sensor

Miniature through-hole mount (THT) MK06 Series Reed Sensor used in On/Off control switch, proximity, motion, position detection. 1 inch (2.54mm) pin spacing available. UL Approval

UL Certificate of Compliance (MKxxU *Series followed by U)

MK25 Reed Sensor

ATEX & IECEx approved (intrinsically safe) contactless push button panel mount MK25 Series Reed Sensor. Optional internal switch, cable, length, and termination. Button plates, emergency stop buttons, etc. can be provided with laser inscriptions as required. The information is burnt into the surface and thus, unlike with print-inscribed elements, is very durable. KEMA 05ATEX1206X, KEM 09.0005X Certified to operate in hazardous locations or potentially explosive environments.


Type of protection: II 2 G Ex mb IIC T6
II 2 D Ex tD A21 IP65 T85 °C
In accordance with: IEC/EN 60079-0, IEC/EN 60079-18, IEC/EN 61241-0, IEC/EN 61241-1

ATEX Examination Certificate

ATEX Declaration of Conformity

IECEx Certificate of Conformity

Mounting Instructions for MK25


 

SUBSCRIBE TO OUR NEWSLETTER

We Will Use The Email Address You Provide To Send You Marketing And Promotional Materials Through MailChimp.

Tradeshows & Events

Follow Us

Focused. Leadership

Video
Download Table
Products compare