The **MLS-05W-R/E** is a specific model within the series of magnetic proximity sensors (often referred to as magnetic switches or reed switches) manufactured by companies like **Azbil (formerly Yamatake)**. These are commonly used in industrial automation to detect the position of pneumatic cylinders or moving mechanical parts. --- ## 1. Technical Specifications Below are the primary electronic and physical characteristics of the MLS-05W-R/E: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Magnetic Reed Switch | | **Output Type** | SPST (Single Pole Single Throw) - Normally Open | | **Operating Voltage** | 5V to 120V AC / 5V to 30V DC | | **Switching Current** | 100mA (Max) | | **Contact Capacity** | 3.5VA (Max) | | **Internal Voltage Drop** | 2.4V or less | | **Indicator Light** | Red LED (illuminates when activated) | | **Response Time** | 1.0ms or less | --- ## 2. Core Electronic Components The device functions through a combination of mechanical and solid-state indicators: ### A. The Reed Switch The heart of the sensor is a hermetically sealed glass tube containing two ferromagnetic flexible metal contacts. * **Action:** When a magnetic field (usually from a magnet mounted on a piston) comes close, the contacts are pulled together, completing the circuit. * **Benefit:** Since the contacts are sealed in inert gas, they are resistant to corrosion and sparking. ### B. LED Indicator & Protection The "R/E" suffix typically denotes the inclusion of an **Indicator Light** and specific lead wire configurations. * **LED:** A small Light Emitting Diode is wired in series/parallel with the switch to provide visual feedback for troubleshooting. * **Varistor/Zener Diode:** Often included internally to protect the reed contacts from voltage spikes (EMF) generated when switching inductive loads like relay coils. ### C. Wiring Configuration The MLS-05W-R/E is generally a **2-wire** device. * **Brown Wire:** Connects to the Positive (+) side of the load or power source. * **Blue Wire:** Connects to the Negative (-) side or common. --- ## 3. Application Notes ### Installation Precautions 1. **Polarity:** Since it features an LED, the polarity must be observed for the light to function, even if the reed switch itself is bi-directional. 2. **Magnetic Interference:** Avoid mounting near high-voltage cables or large motors that generate electromagnetic interference (EMI), as this can cause false triggering. 3. **Current Limiting:** Ensure the load does not exceed 100mA. If driving a large motor or heater, use this sensor to trigger an intermediate relay. ---