Changeover reed sensor products contain one or more single-pole double throw SPDT reed switches where a normally closed contact opens before a normally open contact closes. A changeover reed sensor is also referred to as a (Form C) reed sensor or break-before-make (Form C) which defines the sequence in which one reed switch contact opens its connection to another contact and then closes its connection to a third contact. Changeover reed sensors can also be used as a (Form B), normally closed reed sensor (N.C.) application.

Model	Image	Description
MK23 Series Reed Sensor		Best value ultraminiature bare glass surface mount (SMD) MK23 Series Reed Sensor series used in On/Off control switch, proximity, motion, position detection with high voltage and Form C (SPDT Changeover) options. Supplied in tape and reel according to IEC 286/part 3. Axial, gull-wing, inverse gull-wing, J-lead or helix lead designs available. UL Approval
MK01 Series 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
MK14 Series 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.
MK03 Series 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
MK11 Series 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
MK11 Series 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
MK11 Series Brass 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
MK07 Series 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
MK02 Series 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
MK28 Series Reed Sensor		Magnetically conductive vane operated screw fastened MK28 Series Reed Sensor with cable terminals is ideal in harsh environments.
MK04 Series Reed Sensor		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
MK05 Series 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
MK13 Series 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
MK26 Series 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 Series 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
MK27 Series 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 Series 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
MK25 Series 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.