Real-Time Water Quality Monitoring.Know before your filter fails.
TDSBot is an inline IoT sensor that tells you — continuously — when your filter is exhausted, your membrane is degrading, or your water is scaling your equipment.
One set of inline sensors. Measures every minute. Alerts you before the problem — not after.
01
Install – inline, 20 minutes
Inline dual conductivity probes, 1/4″ to 1″ fittings, no special tools. Pair over BLE, set up WiFi, pick your purifier — TDSBot handshakes with AWS IoT Core over TLS 1.3.
02
TDS, EC, flow, temp
ESP32-S measures TDS, temperature and flow every minute. Uploads to AWS, where the backend computes threshold alerts, filter analytics, and LSI and Larson-Skold indices.
03
Days remaining for filters
Based on Volume, flow rate, TDS, manufacturer baseline. Alert before the problem, not after.
04
Alert, work order, log
Email or webhook. Create work order. Automatic supporting logs for compliance. One view for every location.
Live dashboard
Every reading, one screen
TDS output, filter life remaining, LSI, Larson-Skold and flow rate — analyzed daily, with threshold alerts within the hour. One view for every device across every site.
01Hourly and daily trend charts — spot drift before it is a problem
02Per-site and fleet-level views for multi-location operators
UrgentTDS rejection has fallen to 71%, under the 75% this system is set to hold. The membrane is at the end of its useful life — replace it to bring outgoing TDS back into range.
iOSAndroidWebone account
The hardware
One sensor Two ways to see it
TDSBot ($59) reports to the app. TDSBot Display ($69) adds an onboard LCD for an at-a-glance reading with no phone required. Same sensor, same 20-minute install, same data underneath.
$59.00
TDSBot
$69.00
TDSBot display
Commercial units are priced by size and configuration.
No dashboard-checking required — the whole point is that you don’t have to look until there’s something to see.
01≤ 1 s
Sensor
ESP32-S measures TDS, conductivity, flow and temperature every minute, directly inline.
02≤ 2 s
Cloud
Readings sync over MQTT/TLS 1.3 to AWS IoT Core in real time, normalized to ANSI reference conditions so a reading means the same thing on any install.
03≤ 5 s
ML model
A model trained on ANSI-normalized data tracks TDS drift and volume flow against manufacturer capacity, projecting days remaining with P10/P90 confidence bands.
04< 60 s
Alert
You are notified 30–45 days before exhaustion — not after something has already gone wrong.
Industries served
One sensor, every market
The same TDSBot device, the same AWS IoT Core pipeline, the same dashboard — but each industry has a different reason it cares.
Research pages are independent, non-clinical reference guidesSee all industries →
Compatible systems
Works with the water purifiers already in your building
TDSBot installs inline on any 1/4″ to 1 1/2″ water line — no proprietary connections, no manufacturer lock-in.
Brand names shown are used for illustrative purposes only, to indicate the kinds of systems TDSBot can be installed inline with. This does not imply endorsement, affiliation, or partnership with any manufacturer listed, unless separately announced.
Water & ESG
Every litre filtered counts toward your ESG target
TDSBot calculates your plastic bottle displacement, CO₂ saved and water efficiency — automatically. Corporate ESG reports, site-level or fleet-wide, ready for GRI and CDP disclosure.
5 150 674gallons
Total water filtered
Measured inline, every minute, on every device
38 994 830bottles
Plastic bottles saved across the fleet
At 0.5 L/bottle · volume filtered ÷ bottle size
322 877kg CO₂
Carbon equivalent saved
0.0828 kg CO₂/bottle · Franklin Associates 2023
8 578 862USD
Bottled water and maintenance savings
Bottled H₂O displacement + avoided callouts
904 056miles
Car miles avoided
Transport emissions of displaced bottled water
32 287trees
Equivalent trees planted
GRI 303 Water · GRI 306 Waste · CDP Water Security
Methodology: bottles displaced = volume filtered ÷ bottle size. CO₂ = bottles × 0.0828 kg (Franklin Associates lifecycle LCA, 2023). RO electricity deduction applied using EPA eGRID regional grid factors. All parameters auditable and overridable with citation.
Our customers
Deployed across coffee, hospitality, water service and food service
From single-site independents to multi-property groups and national water service companies.
Oceanic
Buvette
Oceanic
Buvette
Verified customer references available on request under NDA. Customer names published with permission only.
What customers say
The water was always the variable we couldn’t control
“Wow! what a product. For years I have been changing filters every 6 months to a year. TDSBot tells when to change filters. I have saved more money on filters while not compromising on the quality of water. Highly recommended”
John TignelliNorthridge, CA, United States of America
“I was always worried whether my RO system was working properly. Now I know the quality of water whenever I want to. The predictive alerts help me to maintain my system timely. Very much needed.”
Raj TrivediSimi Valley, California, United States of America
“Wow! what a product. For years I have been changing filters every 6 months to a year. TDSBot tells when to change filters. I have saved more money on filters while not compromising on the quality of water. Highly recommended”
John TignelliNorthridge, CA, United States of America
“I was always worried whether my RO system was working properly. Now I know the quality of water whenever I want to. The predictive alerts help me to maintain my system timely. Very much needed.”
Raj TrivediSimi Valley, California, United States of America
Water quality data
83,000+ cities Check yours
Real-time TDS, hardness, LSI, Larson-Skold and PFAS regulatory status — free for any city, updated daily and cross-referenced against EPA SDWIS PWSID records.
Type a city to see its TDS and hardness
CityTDSHardnessVerdict
Tokyo78 ppmSoftExcellent
New York132 ppmModerateGood
Dubai211 ppmHardWatch
Amsterdam285 ppmVery hardPoor
London296 ppmVery hardPoor
Los Angeles348 ppmHardPoor
FAQ
Frequently asked questions
TDSBot measures TDS (total dissolved solids in ppm), electrical conductivity (μS/cm), flow rate (L/min) and temperature (°C) directly inline, every minute. From these it derives the Langelier Saturation Index (LSI), Larson-Skold Index, SCA water zone, filter life remaining and — for dual-sensor RO installations — membrane reject ratio as a proxy for membrane health. Reports publish hourly or daily depending on plan, with alerts firing immediately when thresholds are crossed.
No. TDSBot does not directly measure PFAS or other chemical contaminants. For RO systems, the reject ratio (TDS in vs TDS out) is used as a proxy indicator of membrane performance, which correlates with PFAS removal efficiency. For confirmed PFAS compliance testing, accredited laboratory analysis is required.
TDSBot normalizes every reading to ANSI reference conditions, then a machine learning model tracks TDS drift and volume flow against the manufacturer's rated capacity. It projects days remaining with P10/P90 confidence bands, alerting 30–45 days before exhaustion. For RO membranes, it also monitors the inlet-to-outlet TDS ratio to detect membrane degradation. This typically extends filter cartridge life by 22% compared to fixed monthly replacement schedules.
TDSBot (no display) is $59. TDSBot Display, with an onboard LCD screen, is $69. Both use 1/4 inch fittings. Commercial units are priced by size and configuration — contact WaterTDS for commercial pricing. SaaS plans are Monitor (free for 3 months with hardware, then $2 per device per month), Protect ($3) and Coffee Pro ($7), with volume tiers from 100 devices and 15% off on annual prepaid.
TDSBot is compatible with any water filtration system using standard 1/4 inch to 1 1/2 inch inline fittings, including BWT Bestmax, Everpure, Pentair, 3M Aqua-Pure, Brita Pro, Culligan, iSpring, APEC, Bluewater, Paragon, Kinetico and Ecowater systems, as well as commercial RO and DI systems. Brand names are listed to indicate compatibility only and do not imply endorsement or affiliation.
TDSBot installs inline on any water line using quick-connect fittings. Installation takes approximately 20 minutes with standard tools. It connects via Bluetooth for initial setup, then communicates via WiFi using MQTT over TLS 1.3 to AWS IoT Core.
Yes. TDSBot starts at $59 and works with any residential under-sink RO, whole-house filter or countertop filter using standard 1/4 inch fittings. The Monitor plan is free forever for residential users — no subscription required.
TDSBot is deployed in specialty coffee (espresso machine protection, SCA water compliance), food service (multi-site filter management, machine warranty compliance), commercial water treatment (RO system monitoring, filter depletion prediction), facilities management (CMMS integration), car wash and window cleaning (spot-free rinse), ice machine operators, and residential filtration.
Ready to know your water?
Whether you manage one filter or ten thousand, TDSBot gives you continuous visibility — not a monthly guess.
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WaterTDS Inc
Inline IoT water quality monitoring for coffee, food service, water treatment, facilities and home filtration.
Disclaimers: TDSBot measures TDS, conductivity, temperature and flow rate directly. LSI, Larson-Skold Index, hardness and alkalinity estimates are derived from onboarded utility water chemistry data — not directly measured inline. TDSBot does not measure PFAS, bacteria, or other biological or chemical contaminants; for RO systems, reject ratio is used as a proxy indicator of membrane performance only. TDSBot monitoring data is not a substitute for accredited laboratory testing or statutory water quality compliance testing. All third-party brand names are trademarks of their respective owners; WaterTDS Inc. claims no affiliation, endorsement or partnership unless separately announced.
John TignelliNorthridge, CA, United States of America
Raj TrivediSimi Valley, California, United States of America