--- type: product schema_version: 1 stock_number: "56748-1" canonical_url: "https://www.artisantg.com/56748-1/Princeton-Applied-Research-181" json_url: "https://www.artisantg.com/56748-1/Princeton-Applied-Research-181.json" generated_at: "2026-11-07T02:12:25.437Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # Ametek / EG&G / Princeton Applied Research 181 Current Sensitive Preamplifier _Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._ ## Summary - Manufacturer: Princeton Applied Research - Model: 181 - Condition: Used and in Excellent Condition - Price: $215.00 USD - Availability: In stock, 1 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 9 lb, estimated - Shipping dimensions: 14X14X6 in, estimated ## Categories - Test Equipment > Electrical Test > Amplifiers (primary) ## Function Low-noise, low-input-impedance transimpedance preamplifier converting extremely low detector or device currents to voltage with selectable sensitivities from 104 to 10? V/A, DC to ~200 kHz bandwidth, and single-ended virtual-ground input with adjustable negative bias for photodiodes or semiconductor devices. Provides high dynamic range for small AC signals in presence of large DC currents, main and monitor outputs for connection to lock-in amplifiers or measurement instruments, and operates from ±15/±24 V supplies in bench or system environments. ## Images - - - -