User's Manual

Released – Subject to Change

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RiotConfidential  Page4of17

IOT

Wireless

TheInternetofThingsatwork.

INTRODUCTION

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TheRiotFamilyofUltrasonicLevelSensors,(ProductFamily100‐00)wasdesignedtoprovideaccurate

and cost‐effective remote monitoring of levels in various tanks, storage bins, and silos.  There are

severalproductofferingswithinthefamily,butmostoperatesimilarlyfromauserperspective.

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Reference

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DocumentName/Part# Revision/Version

CentralProcessor 2.7.1

LoRaProcessor

2.2.2

BTLE 2.1.3

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ElementsoftheTankLevelMonitor

ThereareseveralelementsthatmakeuptheRiotUS1Sensorfamily:

1. Sensors

a. Different products in the family use different Ultrasonic sensors – with a variety of

attributes:

i. Frequency‐Multiplefrequenciesareusedforvarioussonicqualities.Ingeneral,

lowerfrequencysensors(longerwavelength)areusedforlongerdistances,and

shorter for shorter.  Also, shorter frequency sensors have shorter minimum

distanceandtendtobemoreusefulforsmallertanks.Lastly,shorterfrequency

sensors tend to be more power efficient and are more suitable for very long

battery life in field applications.  A given device has a fixed frequency due to

optimizationoftheactualsignalingelement.

ii. Material – our standard sensors use an aluminum housing.  This is sonically

efficientandverylowcost.Wealsouseothermaterials(Kynar, etc.) for

applicationswhereexposuretoreactivechemicalsisprevalent.

iii. FrequencyandMaterialcanbespecifiedattimeoforder.

b. SensorProcessing–alldataisprocessedon‐board.Theinternaldevicesincludeanalog

anddigitalfiltering,signalrecognition,andtime‐distancecalculationwithtemperature

errorcorrection.Thedatadeliveredtotheuserisindistance units as defined (i.e.

inchesorcentimeters.)

PhysicalInterfacetotheTransducer

Dataandcommandscanbesenttothetransducerviawiredorwireless means.  A “standard”

transducer has a Blue Tooth Low Energy (BTLE) interface built in.Oncetheconfigurationsare