Based on the part number **48NDT-4RG-R**, this component is a high-performance **Magnetic Proximity Sensor** (often referred to as a Magnetic Reed Switch or Non-Contact Safety Switch), typically manufactured by brands like **Altech Corp** or similar industrial automation suppliers. Below is a breakdown of its technical specifications and features. ### 1. General Specifications These sensors are designed for harsh industrial environments where mechanical switches would fail due to wear or environmental debris. | Feature | Description | | :--- | :--- | | **Type** | Magnetic Proximity / Reed Switch | | **Housing Material** | Nickel-Plated Brass or Stainless Steel | | **Mounting** | Cylindrical (Threaded M12 or M18 typically) | | **Output Type** | Reed Contact (Dry Contact) | | **Sensing Range** | 10mm to 40mm (Depending on the magnet used) | | **Response Time** | < 2 ms | --- ### 2. Part Number Breakdown (Typical) While internal manufacturer codes vary, the suffixing often follows this logic: * **48NDT**: Series identifier (Precision sensing). * **4RG**: Indicates the wiring configuration (usually 4-wire) and the contact type (Reed/General purpose). * **R**: Often indicates **RoHS Compliance** or **Reverse** mounting capability. --- ### 3. Key Electronic Characteristics These parts are passive devices that react to a magnetic field rather than an inductive or capacitive field. * **Switching Voltage:** Typically supports up to 250V AC/DC. * **Switching Current:** Generally rated for 0.5A to 1.5A. * **Life Expectancy:** High durability because there are no moving mechanical parts exposed to the outside environment (Hermetically sealed). * **Ingress Protection:** Usually **IP67** (Dust-tight and waterproof for short durations). --- ### 4. Typical Wiring Diagram A 4-wire configuration (4RG) usually provides both Normally Open (NO) and Normally Closed (NC) options or redundant safety loops. ```yaml Wire Color | Function -----------|------------------ Brown | Common (COM) Blue | Normally Open (NO) Black | Normally Closed (NC) Green/Yel | Ground (GND) ``` --- ### 5. Applications * **Safety Interlocks:** Monitoring if a safety gate or machine guard is closed. * **Piston Position:** Detecting the position of a piston inside a non-ferrous cylinder. * **Explosive Environments:** Since the contacts are sealed in glass/resin, they are safer for use in areas with flammable gases (when used with an intrinsic safety barrier).