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The DPM‑111 is a high-precision digital picoammeter designed for ultra-low DC current measurement across six decade ranges from 10⁻⁹ A to 10⁻⁴ A with 100 % over-ranging. It employs a low-noise AD549 FET‑input electrometer amplifier for extremely low input bias currents (≈ 50 fA), ensuring exceptional resolution and stability. With direct reading on a 3½‑digit LED display, the device automatically handles input polarity and boasts excellent linearity and drift performance. Configurable via USB interface and compatible with DACC / CAMM software for Windows-based logging. Built-in regulated power supply ensures stable operation under voltage variation. Perfect for measuring currents from photomultipliers or photometers, device leakage currents, FET gate currents, high-resistance sample testing, piezoelectric or pH electrode outputs, and air conductivity experiments. |
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