GeoSIG Digital Sensor System has been developed to accommodate the requirements for a cost effective and practical installation in circumstances where several measuring points need to be deployed over long distances. The system consists of GMSplusD recorder and AC-7xD or AC-4xD digital accelerometers, with the option of adding analogue sensors. Each digital accelerometer transfers its data digitally, accurately and effectively to the GMSplusD through a single cost effective Cat5E cable. It is possible to connect up to 4 digital accelerometers (AC-7xD / AC-4xD) to a GMSplusD with a total length of 1'000 meters. Additionally internal or external analogue sensors can be connected to the same GMSplusD to increase the number of monitored channels to 15. Applications • Structural Health Monitoring Residential, Commercial, High Rise Buildings Dams, Bridges, Pipelines, Towers Damage and Serviceability Assessment • Monitoring for chemical, oil & gas industry Seismic Alarm and Safe Shutdown • Ambient vibration testing & monitoring Operational Modal Analysis Induced Vibration Monitoring and Notification • Seismic and Earthquake monitoring Earthquake Early Warning and Rapid Response Earthquake Monitoring Networks Real-time Seismology • Disaster Management Shake Mapping & Hazard Mapping • High expandability Up to 15 channels thru 3 analogue and 12 digital inputs Easy and low cost installation • Real-time data conversion and processing Acceleration, velocity and displacement Low and Highpass filtering, decimation • Reliability 500’000 hours MTBF obtained from real field statistics • Reliable Data for damage detection, decision making and post event evaluation Building code compliant (e.g. California, Panama, etc) Data Acquisition & Analysis Rugged aluminium housing: with levelling base plate for fast and easy installation User-friendly web interface: easy to reach via web browser, tablets or smartphones Multiple advanced triggers: with highly flexible configuration and combinations Easy configuration of interconnected networks: with common timing and triggering Event based and continuous ringbuffer recording: with freely adjustable duration and period definitions Continuous realtime data streams: in SEEDlink and GSBU (low latency) formats Intelligent file management: with user defined storage, transmission and lifetime allocation Smart and flexible time source options: including RTC, NTP, GPS1or interconnected network1 Output & Alarms Communication & Remote Management Data output in industry compatible format: miniSEED as well as including enhanced miniSEED format Data interface/conversion to specialised software: such as Artemis Extractor, MATLAB, SEISAN etc Earthquake early warning and rapid response1: approved by JICA Japan International Cooperation Agency Alarm functions1: via SMS, Email, audible or direct interface (relays) Simultaneous data streaming to several clients Full remote management, maintenance and software updates Simple and secure wireless communication1 Communication via wired Ethernet and serial links. Enhanced connectivity via cellular or satellite devices1 USB interface for communication devices GeoSIG swiss made to measure Self Test Permanent self-monitoring without affecting its normal operation User-configurable periodical state of health (SOH) report

Example Topologies Chain _________________________________________________________________________________________ Single chain Multiple / Tree __________________________________________________________________________________ Refer to the user manual for allowable distances for fewer than 4 sensors. Specifications subject to change without notice Copyright © GeoSIG Ltd, 13.07.2023/ GS_Digital_Sensor_System_Datasheet_V14.docx

Digital Sensor System Frequently Asked Questions: Q1. What is the difference between GMSplus and GMSplusD? A1. GMSplusD is a GMSplus with additional hardware and firmware to allow for connecting GeoSIG digital sensors. Q2. What is the difference between AC-73 and AC-73D? A2. AC-7xD is an AC-7x with additional hardware and firmware to enable a digital signal output. Q3. What is the maximum cable length for the digital sensors? A3. The maximum entire length of the cable on the digital sensor chain is 1’000 meters; contact GeoSIG for further details. Q4. What is the maximum possible number of sensors?...

Sensor Various types of GeoSIG analogue sensors can be housed internally or connected externally, and up to four digital sensors can be connected externally to the GMSplusD. In case of internal sensor, the levelling is done on the base plate of the GMSplusD via its three levelling screws. The base plate is mounted using a single bolt during installation. All external sensors have built-in single bolt mounting with levelling screws. Digitizer Channels: A/D conversion: DSP: Dynamic range: Sampling rate: digital sensors - 3 Ch for analog sensor 24 bit A-I converters individual for each channel 32...