If the photograph is clicked, it grows.

Keithley 6485 10fA Pico Ammeter
SOLD OUT sold
mul782

5-1/2Digits 10fAresolution
Range 2nA-20mA
Acc 0.4%+400fA (2nArange) 0.1% (20uA-20mA)
INPUT VOLTAGE BURDEN: <200μV <1mV (20mA range)
MAXIMUM INPUT CAPACITANCE:10nF on all nA range 2μA range
1μF 20μA ,200μA mA ranges.
MAXIMUM CONTINUOUS INPUT VOLTAGE: 220VDC
NMRR1: (50 or 60Hz) :60dB
MAXIMUM COMMON MODE VOLTAGE: 42V.
ISOLATION (Meter COMMON to chassis): Typically >5*10E11Ω in parallel with <1nF.
ANALOG OUTPUT: 2V full scale acc 3% ±2mV, 1kΩ
INPUT CONNECTOR: BNC on rear panel.
RANGING: Automatic / manual.
CONVERSION TIME:0.01PLC - 60PLC (50PLC under 50Hz operation) from 200μs to 1s)
READING RATE:internal buffer 1000 readings/second1
To IEEE-488 bus 900 readings/second1, 2
TRIGGER LINE: Available
DIGITAL FILTER: Median / averaging (selectable from 2-100 readings).
ENVIRONMENT:Operating: 0°–50°C; relative humidity 70%
WARM-UP: 1 hour to rated accuracy GP-IB RS232C
POWER: 100–120V or 220–240V, 50–60Hz, 30VA.
90mmH × 214mmW × 369mmD
Net Weight: <2.8 kg