Description
AH401D Picoammeter for Ultra Low Current Detection
The AH401D Picoammeter is a high performance measurement instrument designed to detect extremely small currents with exceptional accuracy. It combines a sensitive charge integration input stage with a 20 bit delta sigma analog to digital converter, allowing precise measurement of currents in demanding scientific and industrial environments. This architecture significantly reduces noise and ensures stable signal acquisition even when measuring ultra low current signals.
The device supports eight selectable input current ranges, enabling measurements from as low as 50 picoampere up to 2 microampere. With a resolution that can reach 50 attoampere, the AH401D provides exceptional sensitivity for advanced research applications. Its optimized electronics and high quality signal processing deliver excellent linearity and minimal temperature drift, ensuring consistent measurement performance over long periods.
Charge Integration Technology
A defining feature of the AH401D Picoammeter is its charge integration technology. This method allows the system to measure the total charge received during a defined integration period, ensuring that no signal information is lost. Users can configure the integration time from 1 millisecond up to 1 second, providing flexibility for a wide range of measurement requirements.
Each channel includes two integrator stages. This design enables continuous current to voltage conversion during analog to digital conversion. As a result, the system avoids dead time between measurements and ensures uninterrupted data acquisition. The simultaneous sampling capability across four channels also makes the device ideal for applications that require synchronized multi channel measurements.
Ethernet Connectivity and Remote Control
The AH401D Picoammeter features Ethernet connectivity that supports both TCP/IP and UDP communication protocols. This capability allows the instrument to be easily integrated into modern laboratory networks and automated test environments. Users can remotely configure measurement parameters such as integration time, current range, acquisition mode, and data format.
Data can be transferred using ASCII format or RAW binary format depending on the required transmission speed and analysis workflow. The flexible communication interface simplifies system integration and enables efficient remote monitoring of measurement data.
Beam Monitoring and Detector Applications
The AH401D Picoammeter is particularly well suited for beam position monitoring and multi channel detector systems. It includes an external trigger input that allows the instrument to synchronize its acquisition with external events such as laser pulses or experimental triggers. This synchronization ensures accurate timing between signal events and measurement acquisition.
Its compact design allows the device to be placed close to detectors or signal sources, reducing cable lengths and minimizing external noise interference. This design choice improves signal integrity and measurement accuracy in sensitive experimental setups.
The instrument also includes dedicated oscilloscope software that enables users to configure detector geometry, analyze spectra, and monitor measurement signals in real time. With integrated visualization and analysis tools, researchers can perform photon beam position calculations, intensity measurements, and noise analysis using a single device.
Technical Specifications
| Parameter | Specification |
| Device Type | 4 Channel Charge Integration Picoammeter |
| Number of Channels | 4 |
| ADC Resolution | 20 bit Delta Sigma |
| Measurement Ranges | 50 pA to 2 µA |
| Minimum Resolution | 50 aA |
| Number of Current Ranges | 8 selectable ranges |
| Integration Time | 1 ms to 1 s user selectable |
| Sampling Method | Simultaneous multi channel sampling |
| Data Interface | Ethernet 10/100 Mbit |
| Communication Protocol | TCP/IP and UDP |
| Data Format | ASCII or RAW binary |
| Trigger Input | External trigger synchronization |
| Noise Performance | Ultra low noise design |
| Software | Dedicated oscilloscope and analysis software |
| Form Factor | Compact laboratory instrument |
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