The **KMS-G-R/K** series refers to a specific line of **Load Cells** (typically tension or compression sensors) commonly manufactured by companies like **Kyowa** or similar industrial sensor firms. These devices are used to convert mechanical force into a measurable electrical signal. --- ### 1. Fundamental Electronic Characteristics The KMS-G-R/K operates on the principle of the **Strain Gauge**. Inside the metal body, resistive elements are bonded to a flexible structure. When force is applied, the resistance changes. | Component | Description | | :--- | :--- | | **Bridge Type** | Wheatstone Bridge (usually 350Ω or 700Ω nominal). | | **Excitation Voltage** | Typically 2V to 10V (AC or DC). | | **Rated Output** | Usually 1.0 mV/V to 2.0 mV/V. | | **Terminal Resistance** | Input: ~350Ω; Output: ~350Ω (standard configuration). | --- ### 2. Wiring and Connection (The "R/K" Designator) The suffix often denotes the specific wiring or connector configuration. In industrial standards: * **R:** Often signifies a specific Connector type (e.g., Receptacle) or a Rounded body style. * **K:** Often indicates a specific Cable length or a specialized "Knuckle" joint compatibility. #### Standard 4-Wire Pinout: ```text Red: Excitation (+) Black: Excitation (-) White: Signal (+) Green: Signal (-) Shield: Ground/Case ``` --- ### 3. Key Electronic Specifications These sensors are designed for high precision in harsh environments, characterized by the following electronic parameters: * **Non-linearity:** Usually $\pm0.15\%$ to $\pm0.5\%$ of Full Scale (RO). * **Hysteresis:** Within $\pm0.1\%$ to $\pm0.2\%$ RO. * **Insulation Resistance:** Typically $>2000 M\Omega$ at 50V DC (critical for preventing signal noise). * **Compensated Temperature Range:** Usually $-10^\circ C$ to $+60^\circ C$. --- ### 4. Signal Processing Requirements Because the output is in **millivolts (mV)**, the electronic part of the system requires an external **Signal Conditioner** or **Instrumentation Amplifier**. 1. **Amplification:** Converts the low-level mV signal to 0-10V or 4-20mA. 2. **Filtering:** Removes high-frequency mechanical vibration noise. 3. **A/D Conversion:** Converts the analog voltage to a digital value for a PLC or PC. --- ### 5. Summary Table | Feature | Specification | | :--- | :--- | | **Measurement Mode** | Compression/Tension | | **Circuit Type** | Full-Bridge Strain Gauge | | **Housing Material** | Stainless Steel or Alloy Steel | | **IP Rating** | Typically IP64 or IP67 (dust/water resistant) |