Lock-in Amplifier

The Lock-in Amplifier Manufacturer!

Dexing Magnet is a large enterprise with excellent quality and perfect service in the international magnetometer and machinery industry.

Why choose us

Professional Team

It has a group of experienced technicians and managers in the magnetometer and magnetic industries.

Our Product

Vibrating Sample Magnetometer, Hall Effect System, Gauss Meter, Flux Meter, Electromagnets, Helmholtz Coils, Magnetizers, Magnetic Material Property Testing Systems

Production Market

At present, the Dexinmag company has established cooperative relations with many schools and institutions at home and abroad for more than 30 years, such as Singapore Polytechnic University, Caltech, University of Hong Kong, etc.

Customized service

Equipment quality Reliable, electrical components and hydraulic transmission components are imported from Japan's Mitsubishi and Italy, and can provide qualified products and good after-sales service.

Voltage input Mode	Single-ended or Differential
Full-scale Sensitivity	1 nV to 1 V in a 1-2-5 sequence
Current input	106 or 108 V/A
Impedance
Voltage	10 MΩ//25 pF,Ac or DC coupling
Current	1 kΩ to virtual ground
C.M.R.R	>100 dB (within 100kHz), >90dB (beyond 100kHz)
Dynamic reserve	>100 dB
Gain accuracy	0.2% typ, 1% max
Voltage Noise
997Hz	9 nV/√Hz
Current Noise
97 Hz	0.13 pA/√ Hz
997Hz	0.14 pA/√ Hz
Line filters	50/60 Hz and 100/120 Hz
Grounding	BNC (A/I, B)shield can be grounded or floated via 10 kΩ to ground
Stability	2ppm/℃

Advantages of digital lock-in amplifiers

01/

High sensitivity and selectivity: Lock-in amplifiers can detect signals even if they are buried in noise, with sensitivities down to nanovolts or even picovolts.

02/

Effective noise reduction: By using phase-sensitive detection and only amplifying signals at a specific frequency and phase, lock-in amplifiers can effectively filter out noise that is not at the reference frequency, including broadband noise.

03/

Signal recovery from noisy environments: They excel in extracting signals from highly noisy environments, making them suitable for precise measurements in physics, chemistry, and biology, among other fields.

04/

Phase and amplitude measurement: Lock-in amplifiers can measure both the amplitude and the phase of the signal relative to the reference, providing comprehensive signal analysis capabilities.

05/

Versatile application: They are used in a wide range of applications, from quantum computing and optical studies to vibration analysis and bioelectrical research.

06/

Dynamic range: High dynamic range allows lock-in amplifiers to process signals of varying amplitudes, from very small to relatively large, without changing the setup or losing accuracy.

Applications of digital lock-in amplifiers

Cell imaging with a digital lock-in amplifier
A digital lock-in amplifier enables dual-channel, real-time imaging using techniques such as stimulated Raman scattering (SRS) microscopy. By using a high-quality digital lock-in amplifier, researchers can perform simultaneous, dual-channel imaging of live cell samples.

Dark matter detection with a digital lock-in amplifier
Researchers worldwide are pushing the limits of particle physics in order to successfully detect dark matter. By using a digital lock-in amplifier, they can leverage high levels of flexibility and performance to measure signals down to the nV level.

Quantum sensing with a digital lock-in amplifier
In applications such as quantum sensing and optical clock development, system stability is paramount. With digital instrumentation, entire test setups can be consolidated into a single device, leading to more stable results and reduced loss in the system.

Deliver, Shipping And Serving

Delivery Time

We promise to complete production and shipment within 7 working days after receiving the order.

Transportation

Professional packaging and safe transportation methods are used to ensure the safety of the equipment during transportation.

After-sales service

We provide comprehensive after-sales service, including equipment installation guidance, operation training, maintenance and so on. Meanwhile, we have a 24-hour customer service hotline to answer your questions at any time.

FAQ

Q: What is a lock-in amplifier?

A: A lock-in amplifier is a precision electronic instrument used to measure and amplify specific frequency components in a signal. By phase-locking with the input signal, it can accurately extract weak signals buried in noise background. Lock-in amplifiers are commonly used in experimental research and precise measurements in fields such as optics, electronics, and magnetism.

Q: How does a lock-in amplifier work?

A: The basic principle of a lock-in amplifier is to phase-synchronously lock the signal to be measured with a reference signal, and after filtering, amplification, etc., it outputs a signal in which both amplitude and phase information have been measured. This method effectively extracts weak signals, suppresses background noise, and improves measurement sensitivity and accuracy.

Q: What are the application areas of lock-in amplifiers?

A: Lock-in amplifiers are widely used in scientific research, industrial production, and precision instrumentation fields. In optical experiments, lock-in amplifiers are used to measure optical interference, optical scattering, and other phenomena; in the electronics field, they are used to detect weak signals and noise interference; in the biomedical field, they are used for control and monitoring of treatment devices, and so on. In general, lock-in amplifiers play an important role in improving signal measurement accuracy and noise suppression.

Q: What is a lock-in amplifier DC signal?

A: A lock-in amplifier DC signal refers to the output signal of the lock-in amplifier after it has processed an input signal using phase-sensitive detection.

Q: What is the voltage of a lock-in amplifier?

A: Lock-in amplifiers, as a general rule, display the input signal in volts rms. When a lock-in displays a magnitude of 1 V (rms), the component of the input signal (at the reference frequency) is a sine wave with an amplitude of 1 Vrms, or 2.8 Vpp.

Q: What is the transfer function of a lock-in amplifier?

A: In the frequency domain, the overall transfer function of a lock-in amplifier can then be thought of as the one of a band-pass filter with arbitrarily selectable center frequency – the reference frequency - and bandwidth – the low-pass filter bandwidth.

Q: What is a lock-in amplifier used to measure resistance?

A: A lock-in amplifier is a very effective device used to measure weak signals having pink or white noise. It is commonly used in laboratories. The lock-in, besides the signal input, needs a reference input at a known frequency, phase and amplitude, typically 1V, to measure the weak signal.

Q: What is the reserve of a lock-in amplifier?

A: The dynamic reserve of a lock-in amplifier at a given full-scale input voltage is the ratio (in dB) of the largest interfering signal to the full-scale input voltage.

Q: What is the sensitivity of a lock-in amplifier?

A: Sensitivity determines how the Lock-in Amplifier maps the input level to the output level. For example, a 1 mVpp sinusoidal signal is mapped to a 0.25 mV DC signal at the output, assuming 0 phase difference. If we apply a 40 dB gain at the output, the signal is now mapped to a 25 mV DC.

Q: What is the time constant in a lock-in amplifier?

A: By increasing the time constant setting, lock-in amplifiers can measure very small signals obscured by noise that is a lot larger. Increasing the time constant will increase the measurement time, and this cannot be shortened with the lock-in amplifier alone.

As one of the leading lock-in amplifier manufacturers and suppliers in China, we warmly welcome you to buy customized lock-in amplifier from our factory. All equipment are with high quality and competitive price.

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