The DAS-1 is a true workhorse, capable of operating in a wide temperature range (-30 F to 110 F) with a weather resistant anodized 5052 aluminum case. It shines in frequent long-term monitoring or borehole applications
The DAS-1 system easily interfaces with ERTLab 3-D inversion software which allows three-dimensional tomographic modeling and inversion, creation of 2D and 3D arrays/schedules for electrical resistivity measurement and a powerful graphical environment for displaying resistivity and IP models
8 Fully Independent Channels with 24 bit Resolution
The DAS-1 has 8, fully-independent, galvanically isolated receiver channels plus a dedicated current monitor, each with a dedicated 24-bit analog-to-digital converter. Unlike competing instruments, the receiving channels are not linked together. Any channel can be connected to any electrode for any reading. The channels are also optically isolated from each other so each channel is truly independent from the others. Most competing instruments have a common ground for all the receiving channels. Although the details of this ground are generally buried deep in the user manual, the handling of this ground can be critical to achieving good data quality. The isolated, independent channels of the DAS-1 avoid this issue.
Powerful and Portable
With a built in, 250 watt, high efficiency transmitter designed to run at full power off a single 12 volt battery or power supply, the DAS-1 is well suited for long-term remote monitoring, large-scale 3D, standard long 2D, borehole, and marine surveys.
The DAS-1 unit has connections for up to 64 electrodes.
Up to 250 64 electrode multiplexer units (MUX-1) can be connected to a single DAS-1 unit, allowing for ERT/IP surveys with very large electrode counts.
Optimized for Autonomous Monitoring
The DAS-1 system includes both hardware and software optimizations for precise, stable, reliable, cost-effective long-term monitoring of sites ranging from a few dozen to hundreds of electrodes.
Versatile (ERT, IP, SP)
Data can be collected in 5 distinct operating modes.
Time Domain: Time-domain resistivity and IP with up to 35 user defined windows and base frequencies from 1/64 to 13.5 Hz.
Frequency Domain: Phase and amplitude from amplitude data from 1/64 Hz to 5 Hz.
Spectral IP: measurements at one or more of seventeen preassigned frequencies from 225 Hz to 1/64 Hz
Data Stream: record up to 128 input voltages per channel
Self Potential: measure the self-potential value at one or more receiver pairs without transmitting current.