MK37 Recessed Reed Sensors

Introduction

The Standex Electronics MK37 series is a range of recessed magnetic reed sensors designed to detect the opening, closing, or position of nearby magnet-equipped objects. These compact sensors are installed flush within a surface, making them well suited to discreet and protected sensing applications.

Part Description

MK37 recessed reed sensors use a non-contact magnetic switching principle. A magnet placed near the sensor changes the state of the internal reed contact, allowing the system to detect whether a door, window, cover, drawer, or moving component is open or closed.

The series is available in normally open and normally closed versions, enabling designers to select the default electrical behavior required by their control or monitoring circuit. The sensors are intended for press-fit recessed installation, helping create a clean appearance while protecting the sensor from accidental impact.

With IP67 environmental protection, MK37 sensors are resistant to dust ingress and temporary water immersion. Multiple cable lengths, cable styles, and housing options support integration into a variety of equipment and installation environments.

Applications

• Door open/closed detection
• Window and skylight monitoring
• Cabinet and enclosure access sensing
• Safety guard position detection
• Drawer and tray position monitoring
• Industrial equipment cover sensing
• Access-control and alarm systems
• Appliance door detection
• Machine panel monitoring
• Magnetic end-position sensing

Industries

• Building automation
• Security and access control
• Industrial automation
• Manufacturing equipment
• Consumer appliances
• HVAC and refrigeration
• Transportation equipment
• Medical equipment
• Telecommunications infrastructure
• Smart home systems

Usage Ideas

1. Smart Cabinet Alarm
   Install an MK37 sensor inside a storage cabinet and pair it with a magnet on the door to trigger an alarm or notification when the cabinet is opened.

2. Machine Guard Monitor
   Use a normally closed MK37 sensor on an industrial equipment guard so a control system can detect when the guard is removed or left open.

3. Workshop Drawer Tracker
   Fit the sensor and magnet to a tool drawer to illuminate an indicator LED or send a status signal when the drawer is not fully closed.

Conclusion

The Standex Electronics MK37 recessed reed sensor series provides a simple, durable, and contactless method for detecting position and access states. Its flush press-fit mounting, normally open or normally closed options, and IP67 protection make it a practical choice for door, window, enclosure, appliance, and industrial monitoring applications.