
IoT TDS and water quality monitoringEvaraTDS
Water quality at a glance
Inline TDS monitoring at RO outlets, running 24×7 with temperature-compensated readings.

- 0 to 2000 ppm
- TDS range
- ±2% FS
- Accuracy
- 30 days
- Battery life
The problem
Why this exists.
Water quality is usually checked with occasional manual sampling, if at all. Users have no continuous visibility into whether their water is safe or within acceptable limits, and contamination or drift goes unnoticed until it becomes a problem.
How it works
The operating principle.
EvaraTDS sits inline at the RO storage tank and measures total dissolved solids and temperature continuously. Readings are temperature-compensated and median-filtered on-device before being streamed to the cloud for trends and alerts.
01
Sense
Inline sensors capture TDS and temperature continuously through the monitoring cycle.
02
Compensate
Local processing corrects for temperature, which otherwise skews conductivity readings.
03
Filter
A median across multiple readings suppresses sensor noise and transient spikes.
04
Stream
Processed values are transmitted for storage, live trends and out-of-range alerts.
Capabilities
What it does.
Real-time TDS monitoring
Continuous measurement across the full 0 – 2000 ppm range.
Temperature compensation
A built-in sensor corrects readings that conductivity alone would skew.
Threshold alerts
Custom warnings for high TDS and failing water quality.
Cloud connected
Live sync with the EvaraOne dashboard.
Data insights
Historical trends, reports and quality analytics.
Anti-corrosion probe
Titanium alloy probe holds accuracy over the long term.
Where it's used
Built for these places.
Retrofit-first, so it installs onto infrastructure that is already there. No pipe cutting, no civil work, no permits.
- Drinking water quality monitoring
- RO plant monitoring
- Water treatment plants
- Industrial process water
- Aquaculture & hydroponics
- Swimming pools
- Community water projects
See it work
This is what EvaraOne shows for it.
A live simulation of the EvaraTDS tile in the platform. The reading ticks, the trace draws, and you can cause the fault it exists to catch.
TDS
86ppm
- Nothing to report. Press a button above to cause a fault.
Questions
About EvaraTDS.
- What does EvaraTDS measure?
- Total dissolved solids from 0 to 2000 ppm at 1 ppm resolution and 2% full-scale accuracy, plus water temperature, which it uses to compensate the reading.
- Where is it used?
- Drinking water lines, RO plant outlets, water treatment plants, industrial process water, aquaculture and community water projects. Wall or pole mount.
- How long does it run and how does it connect?
- Up to 30 days on its 5200 mAh battery, reporting over 4G, NB-IoT, WiFi or LoRaWAN every 1 to 15 minutes.
Works with
Instruments deployed alongside it.
- EvaraTankIoT overhead tank water level monitoringReal-time tank level, overflow and usage insights, measured without touching the water.EvaraTank details
- EvaraFlowSmart retrofit for analog water meters with AI meter readingTurns any existing analog meter smart with a clip-on camera and on-device Edge AI. No pipe cutting.EvaraFlow details
- EvaraValveIoT smart motorised valve for remote water controlTurns a conventional pipeline into a connected, remotely controllable, data-driven distribution system.EvaraValve details
Ready to make every drop measurable?
Talk to the team building the operating system for water infrastructure, from a single tank to an entire smart city.
