SE2031 Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 1 mHz to 10 MHz. With the advantage of the latest digital signal processing technology and high-speed 16-bit ADC, SE2031 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noise. The performance of SE2031 is as good as other lock-in amplifier brands, even better in some certain parameters, such as measurement accuracy, SNR, dynamic reserve. Otherwise, SE2031 integrates some special functions like multiple harmonic measurement, which meets the needs of scientific research and industrial application well.
SE2031 DSP Lock-In Amplifier
Key Features
1 mHz to 10 MHz frequency range
1 nV to 1 V full-scale sensitivity
Time constants from 30 ns to 4 ks
> 120 dB dynamic reserve
A high-performance signal generator
Oscilloscope, spectrum analyzer
PID controller, AM modulation
Up to 4 demodulators
Dual-phase structure guarantees higher accuracy
5.6 inch color TFT-LCD screen, single or dual display
Support remote control, embedded a free LabVIEW program
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Multiple Application Areas
Scanning microscope: AFM, STM, SPM
Materials: Carrier mobility, Carrier density, Hall effect, Ultrasonic materials
Transport measurement: Conductivity measurement, Impedance measurement
Noise represents: Noise density, Cross-correlation measurement
Optical experiment: Spectral analysis, Spectral measurement, THz measurement, TDLAS
Sensor measuring: Gyroscope, Photoelectric sensor, Resonator, Accelerometer
Magnetic Sensor: SQUIDs, NV color center, Atomic Magnetometer, VSM
Biomedical: Microfluidic
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EPR Measurement
Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) is one of the most informative techniques for understanding the electronic structure of paramagnetic substances. EPR spectroscopy is particularly useful for studying (bio)chemical systems with strong local spin densities and their interactions with the environment.
EPR measurements are usually performed in continuous wave (CW) or pulsed (Pulse) mode. The cwEPR spectrometer (see figure) applies a magnetic field of about 0.35 T and measures microwave absorption (X-band) in the 9-10 GHz range. Typically, the microwaves are kept at a fixed frequency and sweep the magnetic field (from 0 mT – 700 mT for the X-band).
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Trusted by Universities and Research Institutes Around the World!
Typical Customers:
• The Hong Kong Polytechnic University
• Universität Regensburg
• Rice University
• Weizmann Institute of Science
• University of Wisconsin-Madison
• Massachusetts Institute of Technology
• University of Texas at Austin
• Northeastern University
You can trust us !
| 1. Signal Channel | |
| Voltage Input Mode | Single-ended or Differential |
| Full-scale Sensitivity | 1 nV to 1 V in a 1-2-5 sequence |
| Impedance | Voltage: 50 Ω// 5pF or 10 MΩ// 5pF, AC or DC coupled |
| C.M.R.R | >70 dB to 100 Hz, >50 dB to 100kHz |
| Dynamic Reserve | > 120 dB |
| Gain Accuracy | 0.5% typ (<1 MHz), 3% max |
| Voltage Noise | 6 nV/√Hz at 99.99 kHz, 14 nV/√Hz at 997 Hz |
| Gounding | BNC shield can be grounded or floated via 1 kΩ to ground |
| 2. Reference Channel | |
| Input | • Frequency range: 1 mHz to 10 MHz • Reference input: TTL or Sine • Input impedance: 1 MΩ//5 pF • TTL level: VINH>3 V , VINL<0.5 V • Sine reference level: 0.2 V < VPP< 10 V, Freq. > 1 Hz |
| Phase | • Resolution: 0.001 deg • Absolute phase error: < 1 deg typ (<1 MHz), 5 deg max • Relative phase error: < 1 mdeg • Orthogonality: 90° ± 0.001° • Phase noise: (Internal ref.) Synthesized, <0.0001°rms at 1 kHz; (External ref.) 0.005°rms at 1 kHz (100 ms time constant, 12 dB/oct) • Drift: <0.01°/℃ below 100 kHz, <0.1°/℃ above 100 kHz |
| Harmonic Detection | 2F, 3F, …nF to 10 MHz (n<32767) |
| Acquisition Time | • Internal ref.: instantaneous acquisition • External ref.: (2 cycles + 5 ms) or 40 ms, whichever is larger |
| 3. Demodulator | |
| Stability | • Digital output: no zero drift on all setting • Display: no zero drift on all setting • Analog output: <50 ppm/℃ for all dynamic reserve settings |
| Harmonic Rejection | -90 dB |
| Time Constant | 30 ns to 4.4 ks (6,12,18,24, 30,36,42,48 dB/oct rolloff) |
| Synchronous Filters | Available below 200 Hz (18,24,30,36,42,48 dB/oct rolloff) |
| 4. Internal Oscillator | |
| Frequency | • Range: 1 mHz to 10 MHz • Accuracy: 2 ppm + 10 µHz • Resolution: 1 mHz |
| Distortion | • -80 dBc (f < 100 kHz) • -60 dBc (f > 1 MHz) |
| Amplitude | 1 μV to 1 Vrms |
| Accuracy | 0.5% typ (<1 MHz), 2% max |
| Stability | 50 ppm/℃ |
| TTL Output | 5V TTL/CMOS level, 50Ω output impedance |
| 5. Interface | USB2.0 and RS-232(DB-9) and 1000Mbps Enthernet |
| 6. Inputs & Outputs | |
| AUX Inputs | • Function: 4 channel inputs • Voltage: ±10 V full scale, 0.1 mV resolution • Impedance: 1 MΩ |
| AUX/CH Outputs | • Function: 4 channel inputs • Voltage: ±10 V full scale, 0.1 mV resolution • Impedance: 1 MΩ |
| Drive Current | 30 mA max output current |
| 7. Display | |
| Screen | 5.6 inch, 640×480 TFT |
| Screen Format | Single or dual display |
| Display Quantities | Each display shows one trace, traces can be defined as X,Y,R,θ |
| Display Types | Numerical form, bar graph |
| 8. General | |
| Power Requirement | • Voltage: 220 – 240 VAC, 100 – 120 VAC (optional) • Frequency: 50/60 Hz • Power: 40 W |
| Dimension | • 448 (W) × 148 (H) × 513 (D) mm (with feet) • 448 (W) × 133 (H) × 513 (D) mm (without feet) |
| Weight | 12 kg |
Main Machine
| Module No. | Item | Description |
| SE2031 | Digital Lock-in Amplifier | 1 mHz to 10 MHz, 1 nV to 1 V full-scale sensitivity |
