High Accuracy Decade Resistor Box 0-9999.9Ω (0.1Ω Step), Wide Range Rotary Adjustable Electrical Box, Manganese Copper Core Variable Resistor Box for Electronics Laboratory, School Teaching

Product Description： ● This precision resistance decade box is specially designed for physics & electrical experiments in middle schools, high schools, technical schools and universities. It combines stable performance, intuitive operation and durable construction, making it an essential teaching and testing tool for classrooms, labs and basic circuit calibration. ● Built with high-stability precision alloy manganin wire wound non-inductively on a porcelain frame and treated with strict screening, aging and impregnation, the decade resistor box delivers consistent and accurate resistance values to ensure reliable experimental data, minimize errors and reduce repeated adjustments. The rubber-sealed structure and robust housing provide shock resistance and long service life, while the clear panel and rotary knob design enable quick and error-free resistance setting. ● With a wide adjustment range from 0 to 9999.9Ω and a minimum step of 0.1Ω, it fully meets diverse experimental needs. The instrument is user-friendly and helps students grasp electricity and resistance principles through hands-on practice. It supports multiple core electrical experiments: verifying part of Ohm's Law, measuring unknown resistance, adjusting circuit current as a known resistor, expanding voltmeter range, and testing the electromotive force and internal resistance of power supplies. ● Featuring Class 1 accuracy, rated power up to 1W, and strong insulation resistance (>50MΩ) between circuit metal parts and the case, this resistance box ensures safe operation during high-voltage testing and long lab sessions. The compact size fits easily on lab benches, and the simple terminal connection makes setup fast for both individual and group experiments. Specifications: ● Accuracy Class: Class 1 ● Resistance Range: 0–9999.9Ω ● Minimum Step: 0.1Ω ● Rated Power: 1W ● Zero Resistance: Ro <0.035Ω ● Operating Temperature: 0–40°C ● Humidity: 25%–80% RH ● Material: Metal, Plastic, Manganin Alloy ● Color: Black ● Dimensions: Approx. 163×122×85mm / 165×125×60mm Package Includes: ● 1 × Resistance Decade Box ● 1 × User Manual

• High Precision 0.1Ω Step Resistance: This adjustable resistor box offers a range of 0–9999.9Ω with a resolution of 0.1Ω, providing stable and accurate resistance values for circuit testing and calibration. Decade resistance box is ideal for calibration, prototype testing, and classroom electrical experiments.
• Reliable Manganese-Copper Construction: This variable resistor box features a high-quality manganese-copper alloy core, ensuring stable performance across a wide temperature range and during prolonged operation. Decade resistor box delivers outstanding performance that guarantees reliable and accurate experimental data, minimizing errors and the need for repeated adjustments.
• Simple and Intuitive Operation: Equipped with a clear rotary knob, this adjustable resistance box allows for efficient and quick resistance adjustment, offering a more user-friendly experience and enabling one-handed operation. Lightweight and portable, it is convenient for teaching and demonstrations, making it ideal for classroom use and student experiments.
• Safe and Shock-Resistant Design: This adjustable resistance box features a double-layered ABS housing with excellent insulation resistance, minimizing the impact of vibrations on precision resistors and switches. This resistance decade box ensures safer operation and protects users during high-voltage testing and extended laboratory work.
• Wide Range of Applications: This resistance box is suitable for electronics laboratories, multimeter calibration, PLC debugging, automotive electronics, field repairs, and industrial circuit prototyping, flexibly adapting to various work scenarios.
• Professional Support & Reliable Service: We provide 7×24 hours after-sales service and focus on customer experience and satisfaction. If you have any questions or quality issues about this adjustable electrical box, please feel free to contact us for timely solutions.