High Performance Four-Channel Amplifier and Signal Conditioner

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 voltage 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. Download Model 440 Datasheet Here.

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