Standex Electronics MK37 Recessed Reed Sensors

Introduction

The Standex Electronics MK37 series is a family of recessed magnetic reed sensors designed to detect the presence or position of a magnet without physical contact. Manufactured by MEDER electronic, these compact sensors are intended for press-fit installation in doors, windows, cabinets, enclosures, and equipment housings.

Part Description

MK37 recessed reed sensors provide reliable magnetic switching in a compact housing that can be installed flush within drilled mounting holes. Their recessed design helps protect the sensor from accidental impact, tampering, and environmental exposure while maintaining a clean installation appearance.

The series is available with normally open Form A and normally closed Form B reed switch configurations. A normally open model closes its electrical circuit when an appropriate magnet is brought near the sensor, while a normally closed model opens the circuit in the presence of the magnet. This allows designers to select a switching behavior that suits the application’s control or monitoring requirements.

Key characteristics of the MK37 series include:

• Noncontact magnetic position and proximity sensing
• Recessed press-fit mounting arrangement
• Normally open Form A and normally closed Form B options
• IP67 environmental protection
• Cable and housing configuration options
• Suitable for door, window, lid, panel, and enclosure monitoring
• Compact construction for concealed installations

Because reed contacts operate magnetically and require no mechanical actuator, MK37 sensors can support long-life position detection with minimal mechanical wear.

Applications

Potential applications for MK37 recessed reed sensors include:

• Door open/closed detection
• Window security monitoring
• Cabinet and drawer position sensing
• Electrical enclosure door monitoring
• Machine guard position detection
• Access panel status monitoring
• Industrial equipment cover sensing
• Storage compartment monitoring
• Furniture and appliance door detection
• Vehicle compartment and hatch position sensing
• Vending machine service door monitoring
• Smart building occupancy and access systems

Industries

The MK37 series can be used across a variety of industries, including:

• Building automation
• Security and access control
• Industrial automation
• Manufacturing equipment
• Electrical and power distribution
• Consumer appliances
• Furniture and cabinetry
• Transportation and automotive equipment
• Medical equipment
• Retail and vending systems
• Telecommunications infrastructure
• Smart home products

Usage Ideas

1. Magnetic Cabinet Alarm
   Install an MK37 sensor inside a storage cabinet frame and place a matching magnet on the door. Connect the sensor to an alarm controller to detect unauthorized opening.

2. Machine Guard Interlock Monitor
   Use the sensor to monitor whether a removable machine cover or safety guard is correctly closed before allowing a controller to enable operation.

3. Smart Window Status Indicator
   Mount the recessed sensor in a window frame and use a nearby magnet on the sash to report open or closed status to a home automation hub.

Conclusion

The Standex Electronics MK37 recessed reed sensor series offers a practical solution for reliable noncontact magnetic sensing in protected, space-efficient installations. With IP67 protection, recessed press-fit mounting, and normally open or normally closed switching options, these sensors are well suited to door, window, enclosure, and equipment position-monitoring applications across commercial, industrial, and residential systems.