Lock-In Amplifiers LIA-MV(D)-200


  • Single and dual phase
  • Rugged aluminum housing
  • BNC connectors for input and output signals
  • Working frequency 5 Hz up to 120 kHz
  • Phase shifter 0° … +360°
  • Current and voltage input
  • Optional reference oscillator module SOM-1 available
ModelLIA-MV-200-L Single PhaseLIA-MV-200-H Single PhaseLIA-MVD-200-L Dual PhaseLIA-MVD-200-H Dual Phase
Working Frequency5 Hz … 10 kHz50 Hz … 120 kHz5 Hz … 10 kHz50 Hz … 120 kHz
Time Constants3 ms – 10 s 6 oder 12 dB/Okt.300 µs – 1 s 6 oder 12 dB/Okt.3 ms – 10 s 6 oder 12 dB/Okt.300 µs – 1 s 6 oder 12 dB/Okt.
Adjustable Signal Filter [6 dB/Okt.] Highpass 0.2 Hz – 1 kHz Lowpass 100 Hz – 1 MHzHighpass 2 Hz – 10 kHz Lowpass 100 Hz – 1 MHzHighpass 0.2 Hz – 1 kHz Lowpass 100 Hz – 1 MHzHighpass 2 Hz – 10 kHz Lowpass 100 Hz – 1 MHz
Outputs (BNC)X = In Phase, ±10 V full scale, short circuit proof, signal monitor outputX = In Phase, Y = Quadrature, R = Magnitude, ±10 V full scale, short circuit proof, signal monitor output
Sensitivity (Full Scale)Voltage: 3 µV – 1 V in 1-3-10 steps Current: 30 pA – 10 µA in 1-3-10 steps
Voltage Input (BNC)Instrumentation amplifier, noise 12 nV/√Hz
Current Input (BNC)Transimpedance amplifier, gain: 100 kV/A, noise: 0,4 pA/√Hz
Reference Input (BNC)±100 mV to ±5 V, switchable to TTL
PhaseAdjustable 0° - 360°; resolution: 8-bit @ f ≤ 60 kHz, 7-bit @ f > 60 kHz, temperature drift <0,01°/K
Max. Dyn. Reserve80 dB
Control Interface16 Opto coupler protected digital inputs, TTL/CMOS compatible 8 bit phase, 4 bit time constant, 4 bit sensitivity
Power Requirements±15 V, +120 mA / -60 mA
Dimensions223 x 105 x 65 mm (L x W x H), weight 1,000 g (2.2 lbs)

The optional Reference Oscillator SOM-1 can be connected by an extension connector inside the module. Power supply via 3-pin Lemo® socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet.

Lock-In-Amplifier as a standard

The high prices for usual desktop lock-in amplifiers mean that they are not as common in noise limited experiments as would be desirable. For this reason FEMTO designed a complete, easy-to-use and high performance lock-in amplifier expanding the reach of lock-in amplifiers into cost-sensitive applications.

Programming the lock-in manually or by computer

The Series LIA-MV(D)-200 Lock-In Amplifiers are designed as stand-alone units which can be programmed both manually by front-panel switches and remotely by a digital interface. By using a PC with a standard digital I/O card all main settings for sensitivity, time constant and phase shift can easily be controlled. Therefore, the Series LIA-MV(D)-200 Lock-In Amplifiers are the ideal tool for integration into complex or automated test systems as well as for use as standard lab unit in cost-sensitive applications.

Block Diagram LIA-MVD-200-H


  • Spectroscopy
  • Luminescence, fluorescence, phosphorescence measurements
  • Light scattering measurements
  • Laser stabilization
  • Opto-electronical quality control
  • Integration into industrial and scientific measurement-systems
  • Alternative to expensive desktop lock-in amplifiers for general lab use

Related products / accessories

Power Supply

USB Control Interface LUCI-10