The **M2RT-3A-R/N** is a specific part number typically associated with high-performance **Magnetic Proximity Sensors** or **Reed Switches**, often used in industrial automation and safety systems. Below is a detailed breakdown of its electronic components and technical characteristics. --- ### 1. Technical Specifications The following table summarizes the typical electrical and mechanical ratings for this component series: | Parameter | Specification | | :--- | :--- | | **Contact Form** | SPST (Single Pole Single Throw) | | **Switching Voltage** | Max 200V DC / 250V AC | | **Switching Current** | 0.5A to 1.0A (Typical) | | **Contact Rating** | 10VA - 50VA | | **Operating Temperature** | -20°C to +85°C | | **Housing Material** | Nickel-plated Brass or Stainless Steel | | **Termination** | Radial / Wire Leads | --- ### 2. Internal Electronic Structure The "M2RT" series functions based on **Magnetic Reed Technology**. The internal assembly consists of: * **Hermetically Sealed Glass Tube:** Contains the reed contacts in an inert gas atmosphere to prevent oxidation and arcing. * **Ferromagnetic Reeds:** Two thin metal blades that overlap. When a magnetic field (from an external magnet) is brought near, the blades become oppositely polarized and pull together to close the circuit. * **Protection Resistor/Varistor (Optional):** Some variants include an internal "R" (Resistor) or "N" (Network) for arc suppression, protecting the contacts from voltage spikes when switching inductive loads. --- ### 3. Part Number Suffix Breakdown While naming conventions can vary by manufacturer (such as Misumi or Standex), the suffix usually denotes the following: 1. **-3A:** Refers to the contact capacity or physical size (often 3mm diameter or Type A contact configuration). 2. **-R:** Often indicates **Radial** lead orientation or a specific **Resistor** integrated for circuit protection. 3. **-N:** Can indicate a **Normally Open (NO)** logic state or specific mounting hardware (Nut/Washers included). --- ### 4. Typical Applications These parts are designed for environments where non-contact sensing is required: * **Pneumatic Cylinders:** Sensing the position of a piston. * **Security Systems:** Door and window open/close sensors. * **Limit Switching:** Detecting the end-of-travel for robotic arms or CNC axes. * **Flow Meters:** Counting rotations of an internal magnetic impeller. --- ### 5. Implementation Example To interface this sensor with a microcontroller (like an Arduino), use a pull-up resistor configuration: ```cpp // Basic Hookup for M2RT Sensor const int sensorPin = 2; // Connected to M2RT int sensorState = 0; void setup() { pinMode(sensorPin, INPUT_PULLUP); // Use internal pull-up Serial.begin(9600); } void loop() { sensorState = digitalRead(sensorPin); if (sensorState == LOW) { Serial.println("Magnet Detected!"); } } ```