Stanford Research Systems SR570 Low-Noise Current Preamplifier

Condition: Used Electronic T&M Multifunction & Appliance Testers Multimeters & Clamp Meters Oscilloscopes & Accessories Power Supplies RF & Microwave Spectrum Analysers & VNAs Cable & Antenna Analysers Fiber Optics OTDR Splicing Loss Testers & Fault Locators Network Testers LAN Cable Testers & Certifiers 10G Testers Satellite & GPS Medical & Lab Industrial WELCOME TO TT Instruments Top Brands | Great Prices | Rapid Delivery ✅ QUALITY PRODUCTS Top brands, rigorously checked ✅ FAST WORLDWIDE SHIPPING Express delivery to your door ✅ COMPETITIVE PRICES Best value for quality equipment Stanford Research Systems SR570 Low-Noise Current Preamplifier The images provided are of the actual item you will receive. Please review them carefully for cosmetic condition. Item Description Condition & Functionality Condition Used — very good cosmetic condition Functionality Power tested and confirmed operational Electrical Safety PAT tested — passed What's Included Stanford Research Systems SR570 Low-Noise Current Preamplifier (unit only) The Stanford Research Systems SR570 is a high-performance low-noise current preamplifier designed for precision laboratory measurements requiring conversion of small currents to a proportional voltage output. With sensitivity settings spanning 1 pA/V to 1 mA/V and an input noise floor as low as 5 fA/√Hz, the SR570 is widely used in photonic, low-temperature, and lock-in detection applications. The instrument features selectable gain modes, two configurable signal filters, an adjustable DC bias voltage, variable input offset current suppression, and both line and internal battery operation — making it one of the most versatile and capable current preamplifiers available. Key Technical Specifications Sensitivity Range 1 pA/V to 1 mA/V in 1-2-5 sequence (vernier adjustment in 0.5% steps) Input Noise 5 fA/√Hz (minimum, low noise mode) Maximum Bandwidth 1 MHz (±0.5 dB) Maximum Input Current ±5 mA Input Offset Current ±1 pA to ±1 mA adjustable DC offset Bias Voltage ±5 V adjustable (virtual null or user-set) Gain Modes Low Noise, High Bandwidth, Low Drift Signal Filters 2 configurable 6 dB/oct filters (low-pass, high-pass, or band-pass); -3 dB points from 0.03 Hz to 1 MHz in 1-3-10 sequence Output ±5 V into high impedance load; 50 Ω output impedance Gain Accuracy ±0.5% of output + 10 mV (at 25°C) Grounding Fully floating amplifier ground; input ground can float up to ±40 V TTL Control Inputs Opto-isolated Toggle and Blank inputs (rear panel BNC) Rear Panel Biasing ±12 VDC @ 200 mA switched amplifier power output Computer Interface RS-232 (DCE, 9600 baud, receive only) via DB25 connector Power 100/120/220/240 VAC, 48–66 Hz; 6 W (charged), 30 W (while charging) Battery Operation Up to 15 hours from internal rechargeable lead-acid cells Dimensions (W×H×L) 8.3" × 3.5" × 13.0" Weight 15 lbs Origin Made in U.S.A. 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