SUTRON CORPORATION Real-Time Data from anywhere to everywhere New products and enhancements in the field of Data Collection & the next generation telemetry products Sutron is an ISO 9001:2008 Certified Company March 30, 2011

Sutron New Product Highlights

8310 Remote Data Logger and Telemetry Designed as an 8210 Replacement NEMA and non-NEMA versions Simple Front panel setup without PC or menu setup using PC. Built-in measurement circuitry to handle sensors commonly used. Flexible measurement schedules and logging schemes. Built-in BASIC to support custom measurements, processing and communications. Built-in support for GOES, Iridium, GPRS, and telephone modems including speech.

8310 Features – Every thing you need built-in 8 analog inputs – 16 bit A/D, 0.002% accuracy 4 counter/frequency inputs – 0.01% accuracy SDI-12 – dual connections. SD card for data retrieval or setup. Built-in solar panel regulator. Removable terminal strips. -40C to +60C operation Optional GPRS, IRIDIUM, SATLINK – dual coms Ethernet built-in

Satlink V2 Production units ready May 2011 Key improvements: Run 30 days without GPS. Antenna pointing calculator Supports all new satellite channels with lower power requirements Automatic setting of power based on antenna type and satellite

Dome Antenna >6dB gain, 60 deg HPBW Stainless steel design with UV resistant dome Easy to use mounting bracket with angle markings. Release – July 2011

SDI Link Up to 1 mile range Built-in solar regulator One master – many slaves Supports SDI without gimmicks Optional Analog/Digital I/O for direct sensor measurements NEMA 4X enclosure

Dual Orifice Bubbler -- DOB  Key Features  All-in-one design with display, SD, desiccant, log, SDI-12  Accubar accuracy – dual sensors  Auto purges  Great diagnostics  Applications:  Multiple channels  Upstream/downstream  Redundancy  Expanded range  Density version for steams with sediment and tidal areas  New: fasttrack mode, flow computation and line length error calculation.

Total Precipitation Gauge -- TPG 36” capacity SDI-12/RS232 1 and 3 cell versions 0.001” resolution Installs on 4.5” OD pipe Simple calibration using weights Internal temperature and battery measurements Cast aluminum base UV resistant housing. 8” aluminum opening

Sutron Capabilities New Sutron Products Xpert/Xlite Data Loggers 8310 Series Wireless SDI-Link Total Precipitation Gauge Constant Flow Bubbler Dual Orifice bubbler Sutron Communications Goes Satellite (V2 Cert.) Iridium Satellite GPRS/GSM Cell Modems Ethernet Land Line Modem LOS Radio Web Hosting

Iridium Satellite Network Overview Global coverage Requires only one gateway, but can support many (Scalable) System comprises three principal components: –Satellite network –Ground network –Iridium subscriber products ISBD-1

Iridium Constellation Coverage 6 Planes polar orbits 11 Satellites / plane 66 Satellites total Complete Global Coverage 48 Spot Beams / SV ~250 mile diameter per beam ~2800 mile diameter SV footprint Ground Infrastructure Commercial gateway Tempe, Arizona Backup facilities in Chandler, Arizona Redundant Gateway in Fairbanks AK Backup facilities in Chandler, Arizona DoD gateway in Hawaii

Satellite Network Operations Center - SNOC Main facility in Leesburg, VA Back-up facility in Chandler, AZ All satellite operations support

Iridium SBD Data 2008 Traffic 9/12/2015Iridium Proprietary and Confidential14 Commercial Short-Burst Data Traffic – Jan 2008

Iridium SBD Data 9/12/2015Iridium Proprietary and Confidential15 Commercial Short-Burst Data Traffic – Jan Traffic

Iridium/GPRS hardware ISBD-1 ISBD-1-O GPRS-1

Short Burst Data Architecture Overview 17

Real- Time Communications Iridium Modem An Iridium Short Burst Data Transceiver operates on the iridium network to provide two way communications with remote stations. Features: 70% smaller then the Satlink2 Transmitter 70% lighter then the GOES transmitter 50% half the cost of a GOES transmitter Simple RS-232 interface Data Loggers Uniform global latency (less than 1 minute) Coverage in areas not served by cellular Ideal for Ground Water, 2-way, Flood Warning, Alert applications Communications costs as less as $22.00 per month

How Sutron Iridium works for USGS? Can easily with easily Interface with existing loggers Provides 2-way Communications capabilities Higher throughput – allows transmission of camera images Low power and lower acquisition costs Messages transmitted look exactly like GOES msgs to accommodate existing USGS & USACE LRGS/DECODES ground stations Used as redundant/back-up comms for Critical Stations

Thank you very much! Any questions?