The **M2TG-2B-R2/UL** is a specialized electronic component, typically classified as a **Magnetic Proximity Sensor** or a **Magnetic Reed Switch Assembly**, often used in industrial automation, security systems, and position sensing. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications This device operates based on the interaction between a magnetic field and an internal reed switch. When a magnet comes within the sensing range, the internal contact changes state. | Feature | Specification Details | | :--- | :--- | | **Contact Form** | SPST (Single Pole Single Throw) | | **Switching Logic** | Normally Open (NO) or Changeover (depending on wiring) | | **Housing Material** | Robust Plastic or Metal (depending on sub-variant) | | **Safety Standard** | UL (Underwriters Laboratories) Certified | | **Output Type** | Dry Contact (Potential-free) | --- ### 2. Key Electronic Components & Materials The device consists of three primary internal stages: #### A. The Reed Switch The heart of the unit is a hermetically sealed glass envelope containing two ferrous metal reeds. * **Plating:** Usually rhodium or ruthenium to minimize contact resistance and prevent "sticking." * **Protection:** The vacuum or inert gas inside prevents oxidation of the contacts. #### B. Internal Protection (R2 Configuration) The "R2" suffix often denotes specific electronic protection or physical mounting traits: * **Resistor/Diode Protection:** Some versions include internal series resistors or clamping diodes to protect the contacts from back-EMF (Electro-Motive Force) when switching inductive loads like relays. * **Lead Wires:** Typically features UL-rated 22AWG or 24AWG insulated wires. #### C. Magnetic Circuit The device is designed to be triggered by a specific magnetic flux density (measured in Gauss or Ampere-turns). The sensitivity is calibrated so that it does not trigger from ambient electromagnetic interference (EMI). --- ### 3. Electrical Ratings Standard operating limits for this series generally fall within the following parameters: | Parameter | Value (Typical) | | :--- | :--- | | **Max Switching Voltage** | 100V - 200V DC/AC | | **Max Switching Current** | 0.5A | | **Contact Resistance** | < 200 mΩ | | **Insulation Resistance** | > 100 MΩ | | **Dielectric Strength** | 250V DC (minimum) | --- ### 4. Application Use Cases * **Industrial Sensing:** Detecting the position of hydraulic cylinders or pneumatic actuators. * **Security:** Door and window contact sensors for UL-listed alarm panels. * **Safety Interlocks:** Ensuring machine guards are closed before operation. ---