The **JDL-A10-R** is a specific model of an electronic liquid level sensor, commonly used in industrial automation for non-contact or hydrostatic pressure-based level measurement. --- ### 1. Technical Specifications The core electronic profile of the JDL-A10-R typically includes the following parameters: | Component/Feature | Specification | | :--- | :--- | | **Input Voltage** | 12V - 24V DC | | **Output Signal** | 4-20mA (Standard Current Loop) | | **Accuracy** | ±0.5% FS (Full Scale) | | **Load Resistance** | ≤ (Voltage - 10) / 0.02 Ω | | **Operating Temp** | -20°C to +85°C | | **Protection Grade** | IP68 (Submersible) | --- ### 2. Core Electronic Components The device functions through a chain of electronic signal processing: #### A. Piezoresistive Sensor Element The "heart" of the device is a silicon-based pressure diaphragm. When submerged, the pressure deforms the diaphragm, changing its electrical resistance (the piezoresistive effect). #### B. Signal Conditioning Circuit The raw millivolt (mV) signal from the sensor is too weak and noisy for long-distance transmission. The internal PCB performs: * **Amplification:** Boosting the mV signal. * **Temperature Compensation:** Utilizing a thermistor or digital compensation to ensure accuracy across varying temperatures. * **Linearization:** Ensuring the output is perfectly proportional to the liquid depth. #### C. V/I Converter (Voltage to Current) This converts the processed voltage into a stable **4-20mA current loop**. This is preferred in industrial environments because current signals do not suffer from voltage drops over long cables and are highly resistant to EMI (Electromagnetic Interference). --- ### 3. Wiring Configuration The JDL-A10-R usually follows a standard two-wire or three-wire system: ```markdown 1. Red Wire: Power Positive (V+) 2. Blue/Black Wire: Signal Output (4-20mA) / Power Negative (V-) 3. Yellow/Green Wire: Ground/Shield (GND) ``` --- ### 4. Safety & Protection Features * **Reverse Polarity Protection:** Prevents damage if the + and - wires are swapped during installation. * **Surge Protection:** Built-in TVS (Transient Voltage Suppressors) to guard against voltage spikes. * **Atmospheric Vent Tube:** The cable contains a small breathing tube that allows the internal electronics to reference atmospheric pressure, ensuring the sensor only measures the weight of the liquid.