Rain Gauge Developments Brought to You by the

Rain Gauge Developments Brought to You by the Sutron Corporation 2/22/2021 Sutron Corporation Rain Gauge Developments sutron. com 1

Tipping Bucket with Siphon A prominent feature of the new design is the 5 inch (127 mm) high extended funnel catch to eliminate splash loss that occurs in gauges with shorter catches. Splash loss can be a significant source of error during high intensity rainfall events and periods of moderate/high cross winds. Sutron Corporation Rain Gauge Developments 5 in. sutron. com 2

Tipping Bucket with Siphon Sutron offers two models of the tipping bucket rain gauge with siphon 5600 -0725 Models (Includes SDI-12 Interface) Sutron Corporation Rain Gauge Developments 5600 -0625 Models (Without SDI-12 Interface) sutron. com 3

Tipping Bucket with Siphon • Collector funnel • Stainless steel filter screen • Tipping bucket mechanism w/ bubble level • Siphon mechanism – The 0. 2, 0. 5 mm and 0. 01 inch – High accuracy regardless of intensity. Siphon with Filter Sutron Corporation Rain Gauge Developments sutron. com 4

Tipping Bucket with Siphon • • • Robust rim ring World standard 205 mm, 8. 08 inch catch Stainless steel filter screen (sits horizontally) Collector Funnel Filter for siphon Integrated Siphon mechanism – 0. 2, 0. 5 mm and 0. 01 inch – High accuracy regardless of intensity • • Sutron Corporation Single reed switch output signal Tipping bucket mechanism Bubble level in base Mounting base Rain Gauge Developments sutron. com 5

Tipping Bucket with Siphon Receiver 205 mm diameter (8. 08”) Sensitivity One tip at 0. 2 mm, 0. 5 mm, or. 01 inch Measuring Range 0 -700 mm/hr, 0 -27 inches/hr Accuracy ± 2% from 25 – 500 mm/hr Siphon ~4 m. L capacity stainless steel & non-hydroscopic polymer with inset screen Bucket Injection molded non-hydroscopic ABS, UV stabilized, chrome plated & balanced Bearings Sapphire jeweled bearings with hard stainless steel shaft (pivots) Level Bulls eye bubble level Contact System Single reed switch, potted Contact Capacity 24 V (0. 5 amps max) Contact Time 0. 1 seconds Height 483 mm (19 inches) Weight 3 kg (6. 6 lbs) Sutron Corporation Rain Gauge Developments sutron. com 6

Tipping Bucket with Siphon • Mounting Dimensions Sutron Corporation Rain Gauge Developments sutron. com 7

Quick Deploy – Integrated Rainfall Station Components: • • Tipping Bucket Rain Gauge Pole-Mounting Bracket Solar Panel with adjustable mount X-Link in Enclosure w/ Antenna • GPRSLink • HSPALink • CDMALink • Iridium. Link Sutron Corporation Rain Gauge Developments sutron. com 8

Quick Deploy – Integrated Rainfall Station • Send data to Sutron. WIN • Telemetry plans <$10/month for hourly data Sutron Corporation Rain Gauge Developments sutron. com 9

SDI Tipping Bucket Interface Part Number: SDI-TB-1 Sutron Corporation Rain Gauge Developments sutron. com 10

SDI Tipping Bucket Interface • • • Converts tipping bucket into SDI-12 sensor Automatically computes daily and annual precipitation Rechargeable backup power to operate through short power interruptions User-programmable compensation for heavy rainfall rates Compact, rugged design Sutron Corporation Rain Gauge Developments sutron. com 11

SDI Tipping Bucket Interface Sutron Corporation Rain Gauge Developments sutron. com 12

SDI Tipping Bucket Interface Convert any tipping bucket into an SDI-12 sensor • Debounce noisy switches, support SDI V 1. 3 standards, responds to R, M, C commands Auto compute daily / annual precipitation • User-set reset times • Built-in clock accurate to 5 sec/day • Auto time-sync to Sutron loggers Rechargeable Backup Power • The SDI-TB can run off its internal rechargeable backup power in case SDI power is lost. All crucial functions of the SDI-TB, like measuring rainfall and the internal RTC can run for up to 10 hours without SDI-12 power. Smart Sensor Compensation • The SDI-TB can be programmed to compensate for rainfall lost due to heavy rainfall rates especially when using a tipping bucket without a siphon. Low Power • The SDI-TB draws about 100μA and has been optimized to run on a shoe-string power budget. Compact Rugged, Water Resistant • The SDI-TB is compact and encapsulated in a water-resistant epoxy compound for installations in humid environments. Sutron Corporation Rain Gauge Developments sutron. com 13

SDI Tipping Bucket Interface The SDI-TB sensor is very simple to connect and get working. The unit has a 5 position screw header for interfacing with an SDI logger and a standard 2 -wire Tipping bucket. Pin Label Description Power (4 v-20 v) SDI-12 power from the logger/SDI-12 master GND SDI-12 interface ground connection SDI-12 (DATA) Bidirectional SDI data bus GND Ground connection for the Tipping Bucket TB-IN Connect to the reed switch terminal of the tipping bucket Sutron Corporation Rain Gauge Developments sutron. com 14

Specifications • • MECHANICAL /ENVIRONMENTAL – Enclosure Potted enclosure for humid environments – Dimensions 3 x 1. 5 inches – Weight ~60 gms – Temperature -40 C to +60 C – Connector 5 Position terminal block POWER – 4 v-20 v DC – Power ~10 hours – 25 m. A (fully discharged) to 100 u. A (fully charged) – < 100 u. A @12 v (once fully charged) Protocol – SDI-12 v 1. 3 (SDI communication will be disabled when running off internal backup power) Ordering Information – SDI-TB-1 (SDI-12 tipping bucket interface with internal backup power. ) Sutron Corporation Rain Gauge Developments sutron. com 15

Installation Examples Automatic Weather Station - Fiji Sutron Corporation Rain Gauge Developments sutron. com 16

Installation Examples Rainfall Station Network - Oman Sutron Corporation Rain Gauge Developments sutron. com 17

Installation Examples 5600 -0725 Tipping Bucket Sutron Corporation Rain Gauge Developments sutron. com 18

Questions Sutron Corporation Rain Gauge Developments sutron. com 19

Thank You! Sutron Corporation would like to thank you for your time. If you would like a recorded version of this webinar or if you have additional questions, please feel free to contact us at any time: Oldrine Lewis R&D Engineer and Product Manager Tel: (703) 406 -2800 ext. 340 OLewis@sutron. com Robin Ovington R&D Engineer and Product Manager Tel: (703) 406 -2800 ext. 342 ROvington@sutron. com Sutron Corporation 22400 Davis Drive Sterling, VA 20164 Tel: (703) 406 -2800 Sales@sutron. com Sutron Corporation Rain Gauge Developments sutron. com 20