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181:181
MPN:181
Princeton Applied Research:Princeton Applied Research

EG&G/Princeton Applied Research (PAR)/Signal Recovery 181 Current Sensitive Preamplifier/Pre-amplifier Comes with what you see in the pictures. If you don’t see it, you probably won’t get it. Specifications are from Ametek/Signal Recovery and may vary slightly due to upgrades, options, or revisions this unit may or may not have. This unit is tested and guaranteed to work for 30-days, parts and labor, excluding freight. It is ready to ship! Description: The Model 181 Current Sensitive Preamplifer is a high-sensitivity low-noise device ideally suited to processing the exstremely small current signals provided by photodetectors and similar sources. The preamplifier features a virtual-ground input and sensitivity selectable by means of a front-panel switch from 10-4 A/V to 10-9 A/V. A built-in output attenuator allows the output signal to be reduced by a factor of ten. A front-panel OVERLOAD lamp provides warning when output voltage excurisions exceed normal operating levels. There is even provision for biasing an external detector by applying an internally derviced DC voltage to the INPUT connector. The model 181 takes avantage of the accessory power outputs provided on SIGNAL RECOVERY lock-in amplifiers by taking its power from the lock-in amplifier via a rear-panel connector, but it can also be used with a separate line power source, available as an optional extra, or with any suitable regulated power source. With its small size, high performance, and ease of operation, the instrument should prove of significant value in any application involving low-noise processing of small current signals. Input Specifications: Sensitvity: 10-4 A/V to 10-9 A/V in six ranges Overload Indicator: Indicates that instantaneous (DC plus peak AC) current has exceeded amplifier capability Frequency Response: Sensitivity (A/V): Max. DC Input Current at 1 kHz: Frequency Response, DC to: 10-4 1 mA 200 kHz 10-5 100 µA 200 kHz 10-6 10 µA 100 kHz 10-7 1 µA 50 kHz 10-8 100 nA 10 kHz 10-9 10 nA 1 kHz Outputs Specifications: Monitor Output: 600 Ω rear-panel BNC connector permits monitoring of the output signal Main Output: Level: 6.5 V rms maximum Impedance: 1 kΩ nominal Output Attenuator: Provides optional 1:10 attenuation of output voltage Power Specifications: Power: ±15 V or ±24 V at 30 mA General Specifications: Dimensions (Excluding Connectors): 4.5″ W x 6.6″ L x 2.7″ H (114 mm x 168 mm x 69 mm) Weight: 2.2 lbs (1 kg) For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $10.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination. Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.: (1) Are you the end-user of this item? (2) If you are not the ultimate end-user of the item, please state the ultimate end user’s name. (3) What is the ultimate country destination? 02/27/18

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