# Stanford Research Test Equipment Stanford Research Systems formed in 1980 to design and manufacturer high performance test equipment such as radiofrequency (RF) signal generators and current sources. In its more than 30 years of business, Stanford has grown to provide dozens of important industry tools and electronic test devices. Stanford Research manufactures laser diode controllers, temperature controllers, optical choppers, power supplies, spectrum analyzers, meters, data loggers, distribution amplifiers, preamps, signal generators, counters, oscillators, and meters. Engineers who need a product for most kinds of tests can count on Stanford Research to have the right tool. ValueTronics.com sells a variety of used, refurbished Stanford Research equipment. ## Products in this collection - [SR844 Stanford Research Amplifier Used](https://valuetronics.com/products/sr844-stanfo-lock-amp-used) - 0.0 USD - [DS345 Stanford Research Function Generator Used](https://valuetronics.com/products/ds345-stanford-research-function-generator-used) - 0.0 USD - [DS335 Stanford Research Function Generator Used](https://valuetronics.com/products/ds335-stanford-research-function-generator-used) - 245.0 USD - [Stanford Research Systems SR830 DSP Dual Phase Lock-In Amplifier (Pre-Owned)](https://valuetronics.com/products/sr830-stanford-research-lock-in-amplifier-used) - 0.0 USD - [PS375 Stanford Research DC Power Supply Used](https://valuetronics.com/products/ps375-stanford-research-dc-power-supply-used) - 0.0 USD - [SR1 Stanford Research Audio Analyzer Used](https://valuetronics.com/products/sr1-stanford-research-audio-analyzer-used) - 0.0 USD - [SR650 Stanford Research Filter Used](https://valuetronics.com/products/sr650-stanford-research-filter-used) - 0.0 USD - [Stanford Research Systems DG535 Digital Delay/Pulse Generator (Pre-Owned)](https://valuetronics.com/products/dg535-stanford-research-pulse-generator-used) - 0.0 USD - [Stanford Research Systems SR560 Low-Noise Voltage Preamplifier (Pre-Owned)](https://valuetronics.com/products/sr560-stanford-research-preamplifier-used) - 3495.0 USD - [Stanford Research Systems DS360 Ultra-Low Distortion Function Generator (Pre-Owned)](https://valuetronics.com/products/ds360-stanford-research-generator-used) - 0.0 USD - [SR770 Stanford Research Spectrum Analyzer Used](https://valuetronics.com/products/sr770-stanford-research-spectrum-analyzer-used) - 0.0 USD - [SR850 Stanford Research Lock In Amplifier Used](https://valuetronics.com/products/sr850-stanford-research-lock-in-amplifier-used) - 0.0 USD - [SR640 Stanford Research Filter](https://valuetronics.com/products/sr640-stanford-research-filter-used) - 1895.0 USD - [Stanford Research Systems SR810 DSP Single Phase Lock-In Amplifier (Pre-Owned)](https://valuetronics.com/products/sr810-stanford-research-amplifier-used) - 0.0 USD - [DG645 Stanford Research Generator Used](https://valuetronics.com/products/dg645-stanford-research-generator-used) - 0.0 USD - [PS365 Stanford Research DC Power Supply Used](https://valuetronics.com/products/ps365-stanford-research-dc-power-supply-used) - 0.0 USD - [SR720 Stanford Research LCR Meter Used](https://valuetronics.com/products/sr720-stanford-research-lcr-meter-used) - 0.0 USD - [Stanford Research Systems FS725 Rubidium Frequency Standard (Pre-Owned)](https://valuetronics.com/products/fs725-stanford-research-standard-used) - 4795.0 USD - [SR554 Stanford Research Amplifier Used](https://valuetronics.com/products/sr554-stanford-research-amplifier-used) - 0.0 USD - [SR630 Stanford Research Data Logger Used](https://valuetronics.com/products/sr630-stanford-research-data-logger-used) - 0.0 USD - [SR250 Stanford Research Data Logger Used](https://valuetronics.com/products/sr250-stanford-research-data-logger-used) - 2990.0 USD - [SR430 Stanford Research Data Logger Used](https://valuetronics.com/products/sr430-stanford-research-data-logger-used) - 0.0 USD - [FS700 Stanford Research Standard Used](https://valuetronics.com/products/fs700-stanford-research-standard-used) - 0.0 USD - [SR780 Stanford Research Signal Analyzer Used](https://valuetronics.com/products/sr780-stanford-research-signal-analyzer-used) - 0.0 USD - [SR785 Stanford Research Signal Analyzer Used](https://valuetronics.com/products/sr785-stanford-research-signal-analyzer-used) - 0.0 USD - [SR552 Stanford Research Preamplifier Used](https://valuetronics.com/products/sr552-stanford-research-preamplifier-used) - 0.0 USD - [SR550 Stanford Research Preamplifier Used](https://valuetronics.com/products/sr550-stanford-research-preamplifier-used) - 0.0 USD - [Stanford Research Systems SR570 Low-Noise Current Preamplifier (Pre-Owned)](https://valuetronics.com/products/sr570-stanford-research-preamplifier-used) - 0.0 USD - [SR445 Stanford Research Preamplifier Used](https://valuetronics.com/products/sr445-stanford-research-preamplifier-used) - 0.0 USD - [SR715 Stanford Research LCR Meter Used](https://valuetronics.com/products/sr715-stanford-research-lcr-meter-used) - 1295.0 USD - [DS340 Stanford Research Function Generator Used](https://valuetronics.com/products/ds340-stanford-research-function-generator-used) - 0.0 USD - [SR620 Stanford Research Frequency Counter Used](https://valuetronics.com/products/sr620-stanford-research-frequency-counter-used) - 4950.0 USD - [SR760 Stanford Research Spectrum Analyzer Used](https://valuetronics.com/products/sr760-stanford-research-spectrum-analyzer-used) - 4950.0 USD - [SR540 Stanford Research Fiber Optic Equipment Used](https://valuetronics.com/products/sr540-stanford-research-fiber-optic-equipment-used) - 1095.0 USD - [PS310 Stanford Research DC Power Supply Used](https://valuetronics.com/products/ps310-stanford-research-dc-power-supply-used) - 0.0 USD - [PS325 Stanford Research DC Power Supply Used](https://valuetronics.com/products/ps325-stanford-research-dc-power-supply-used) - 0.0 USD - [PS350 Stanford Research DC Power Supply Used](https://valuetronics.com/products/ps350-stanford-research-dc-power-supply-used) - 1995.0 USD - [SR510 Stanford Research Lock In Amplifier Used](https://valuetronics.com/products/sr510-stanford-research-lock-in-amplifier-used) - 2495.0 USD - [FS710 Stanford Research Distribution Amplifier Used](https://valuetronics.com/products/fs710-stanford-research-distribution-amplifier-used) - 0.0 USD - [SR440 Stanford Research Distribution Amplifier Used](https://valuetronics.com/products/sr440-stanford-research-distribution-amplifier-used) - 0.0 USD - [SR530 Stanford Research Lock In Amplifier Used](https://valuetronics.com/products/sr530-stanford-research-lock-in-amplifier-used) - 2995.0 USD --- > Source: [ValueTronics](https://valuetronics.com/collections/manufacturers-stanford-research) > Updated: 2026-06-03