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Model 440     Download Model 440 Datasheet   (PDF)

High Performance Four-Channel Amplifier and Signal Conditioner

Description:

The Brownlee Precision Model 440 incorporates four channels of sophisticated amplifier and filter circuitry in a friendly, easy to use instrument.  Each channel consists of a high gain/low noise amplifier, an 8-pole Bessel lowpass filter, a highpass filter, a line notch filter, and an output offset control.  A control knob sets the amplifier parameters and the values are displayed on a bright LED alphanumeric readout.

wpe18.jpg (81522 bytes) channel detail

 

Key Features:

  • Clear front panel controls for all settings
  • Gains from 0.1 to 10,000 in fine, calibrated steps
  • Single-ended or differential inputs
  • 8-pole Bessel lowpass filter with range 20 Hz to 50 kHz
  • Highpass filter with frequency range .01 Hz to 1 kHz
  • Output offset control to shift output up to +/- 10 Volts
  • Auto-Zero feature to reset the output to the baseline level
  • Notch filter to suppress line noise
  • Digital voltmeter on channels 1 and 2
  • Memories to hold multiple setups
  • Low noise circuitry
  • Self-trimming feature to remove internal offsets
  • Powerful output circuit which can directly drive transducers
  • Wide bandwidth: greater than 200 kHz on all gains