The **PW10M-R100** is a high-precision, single-point load cell manufactured by HBM (Hottinger Brüel & Kjaer). It is specifically designed for industrial weighing applications requiring high accuracy and durability. --- ### 1. Key Technical Specifications The following table highlights the primary electronic and physical characteristics of the PW10M-R100: | Parameter | Specification | | :--- | :--- | | **Capacity (Emax)** | 100 kg | | **Accuracy Class** | C3 (OIML R60) | | **Sensitivity (Cn)** | 2.0 mV/V | | **Input Resistance** | 350 Ω to 450 Ω | | **Output Resistance** | 350 Ω ± 10% | | **Max. Platform Size** | 600 x 500 mm | | **Protection Class** | IP67 | | **Cable Length** | 3 meters (standard) | --- ### 2. Electronic Working Principle The device operates on the **Strain Gauge** principle arranged in a **Wheatstone Bridge** circuit. * **Strain Gauges:** When a load is applied, the metal body of the load cell undergoes microscopic deformation. This changes the electrical resistance of the foil strain gauges bonded to the body. * **Differential Voltage:** The Wheatstone bridge converts this resistance change into a measurable millivolt (mV) output signal proportional to the excitation voltage. * **Compensation:** The internal circuitry includes resistors for temperature compensation and zero-balance adjustment, ensuring accuracy across a temperature range of -10°C to +40°C. --- ### 3. Wiring and Connection The PW10M-R100 typically uses a 6-wire configuration to ensure high accuracy over long cable runs by compensating for lead resistance. | Wire Color | Function | Description | | :--- | :--- | :--- | | **Blue** | Excitation (+) | Positive Power Supply | | **Black** | Excitation (-) | Negative Power Supply | | **White** | Signal (+) | Positive Measurement Output | | **Red** | Signal (-) | Negative Measurement Output | | **Green** | Sense (+) | Feedback for voltage drop | | **Grey** | Sense (-) | Feedback for voltage drop | | **Yellow** | Shield | Connection to ground | --- ### 4. Application Integration To use the PW10M-R100 in an electronic system, the following components are typically required: 1. **ADC (Analog-to-Digital Converter):** High-resolution chips like the HX711 or specialized industrial PLC modules. 2. **Amplifier:** Since the output is in millivolts (2mV per Volt of excitation), an amplifier is necessary to boost the signal for processing. 3. **Excitation Source:** A stable DC power supply (typically 5V to 12V).