info@thinkSRS.com (408) 744-9040
(408) 744-9040
Home > Products > Scientific Instruments > SR551
Preamplifier
SR551 — High impedance preamplifier
SR551 ... from  $750
Preamplifier
SR551 — High impedance preamplifier
SR551 ... from  $750
SR551 ... from  $750
 
BUY / QUOTE
BUY / QUOTE
  • >1 TΩ input impedance
  • Gain of ×10
  • Single-ended and differential inputs
  • 1 MHz bandwidth
  • 12 nV/√Hz voltage noise at 1 kHz
  • Powered by SRS lock-in amplifiers
  • >1 TΩ input impedance
  • Gain of ×10
  • Single-ended/differential inputs
  • 1 MHz bandwidth
  • 12 nV/√Hz noise (1 kHz)
  • Powered by SRS lock-ins
  • 3.6 nV/√Hz input noise
  • FET input, 100 MΩ input impedance
  • Gain of 1, 2, 5 or 10
  • Single-ended and differential inputs
  • AC coupled input
  • Powered by SRS lock-in amplifiers
  • High common mode rejection
          X

SR551 Preamplifier

Overview
The SR551 High Impedance Preamplifier works with SRS lock-in amplifiers to measure voltages from sources with moderate to high source impedance. The preamplifier is designed for source impedances of up to gigaohms with little error from resistive loading, due to its exceptionally high 1 TΩ input impedance. The SR551 operates with a fixed voltage gain of ×10, amplifying signals from DC to 1 MHz.
          X

SR551 Preamplifier

Front Panel

          X

SR551 Preamplifier

SR551 High Impedance Preamp

The SR551 High Impedance Preamplifier works with SRS lock-in amplifiers to measure voltages from sources with moderate to high source impedance. The preamplifier is designed for source impedances of up to gigaohms with little error from resistive loading, due to its exceptionally high 1 TΩ input impedance. The SR551 operates with a fixed voltage gain of ×10, amplifying signals from DC to 1 MHz. Power and control signals are brought from an SRS lock-in amplifier by a 9-pin cable (included). The SR551 may also be operated independently by applying appropriate power supply voltages (±20 VDC).