4-channel simultaneous sampling electrometer with 8 input current ranges (20 bit), 10/100 Mbit Ethernet connectivity and Trigger Input
The AH401D is a compact 4-channel low noise picoammeter. It is composed of an extremely sensitive charge-integration input stage for low-current sensing, combined with a 20-bit delta-sigma AD converter with an integrated noise reduction digital filter.
This device is suited for very low current measurements, with 8 selectable input ranges spanning from 50 pA (with a 50-aA resolution) up to 2 µA (with a 2-pA resolution). Integration time is user selectable and ranges from 1 ms up to 1 s. Each input channel has two integrator stages so that the current-to-voltage conversion can be performed continuously during ADC conversion, avoiding any dead time in the data output. The simultaneous sampling of the 4 independent channels make this instrument ideal for beam position monitor applications or multichannel acquisition.
The new AH401D is housed in a light and extremely compact box that can be placed close to the signal sources in order to reduce cable lengths and minimize possible noise pick-up. Low temperature drift, good linearity and very low noise allow very high precision current measurements.
The picoammeter can be remotely controlled via a standard Ethernet 10/100 Mbit TCP-IP or UDP communication interface: integration time, range, data format, type of acquisition and many other parameters can be easily set and monitored.
The AH401D has an external TRIGGER input signal in order to synchronize the acquisition of the picoammeter with external events (e.g. laser triggering). Furthermore, digital samples can be transferred either using ASCII format or RAW binary data format for fast data transmission.
Perform your current measurements, photon beam position and intensity computations and noise analysis with only one device!
Different detector geometries as well spectra analysis and data savings can be directly set, configured and analyzed on the GUI.
Current Measuring Full-Scale Range
from 50 pA to 2.0 µA
(-0.4 % of Full-Scale allowed)
up to 1 ksamples/s
from 1 ms to 1 s
Noise (@1ms, 200pCFS)
< 7 ppm/FS
Ethernet 10/100 Mbit TCP-IP and UDP
155 × 165 × 42 mm
AH401D – 4-channel Multi-range Charge-Integration Picoammeter with +/-9 V Linear Power Supply