Digital Picoammeter

Product Description

We offer precision Digital Picoammeter very usefull in general laboratory and R&D labs. This is a very versatile multipurpose equipment for the measurement of low dc currents. It has 6 decade ranges with **0% over-ranging from ***9A to ***4A. For the ease, readings are directly obtained on a 3½ digit DPM.
The instrument uses a well designed precision FET electrometer operational amplifier AD**9, which offers the lowest bias currents (*0fA with ±5V supplies) available in any standard operational amplifier. The excellent characteristics of AD**9, ultra low bias current, low offset voltage, low drift and low noise have been fully utilized to obtain best results in the present picoammeter. The first operational amplifier AD**9 is used in low level current to voltage configuration and the output has been directly read on a 3½ digit panel meter. The instrument is capable of accepting either polarity of the current. Well regulated power supplies are incorporated to use the instrument upto *0% changes in a.c. main’s voltage.

Features

• Measures current down to 1pA
• All solid state and IC design
• Very low offset current

• Current from Photomultiplier tubes, Photometers etc.
• Leakage currents in solid state devices.
• FET gate and tube grid-voltage without loading errors
• Current through very high resistance’s in conjunction with a power supply
• Potentials across semiconductors, piezoelectric system & pH/plon sensitive electrodes
• Electrical conductivity of air
• Very low current oxygen sensors