The ESR‑105 is a precision Electron Spin Resonance (ESR) spectrometer designed for the study of paramagnetic substances and materials with unpaired electron spins. It enables users to explore Zeeman splitting, g-factor determination, hyperfine structure, and relaxation phenomena in a range of solid and liquid samples.

Built with a compact electromagnet and high-stability RF oscillator, the ESR‑105 offers fine control over magnetic field sweep and modulation, making it ideal for both teaching and research. The instrument includes a digital display, frequency counter, modulation unit, and sample holder optimized for ESR measurements.

This setup is suitable for university labs, materials science research, and advanced physics education.

🔧 Key Features

• Operating Frequency Range: Typically ~9 MHz to 50 MHz (depends on model variant)

• Digital Frequency Counter for RF monitoring

• Integrated Electromagnet with field modulation

• Sweep Control: Manual or automatic magnetic field sweep

• Sample Holder: Standard quartz tube or glass vials

• Detection: Crystal diode or phase-sensitive detector

• Modulation: Field modulation using audio frequency for signal amplification

• Applications: g-factor measurement, hyperfine structure, Zeeman effect, ESR line width analysis

Applications

• Measurement of g-factor in paramagnetic samples

• Detection of unpaired electrons in organic/inorganic compounds

• Study of transition metal ions, free radicals, and defects in solids

• Zeeman effect and hyperfine structure analysis

• Research in solid-state physics, quantum chemistry, and magnetic resonance