Freshwater Sentinel • Remote water monitoring

See what changes between site visits.

A battery-powered sensor node and cellular dashboard bring water-quality trends into view. Built to help freshwater teams understand changing conditions and plan better follow-up.

Integrated prototype. Seeking partners for supervised field evaluation.

Freshwater Sentinel prototype with a cylindrical enclosure and four probes on a mounting rack
Freshwater SentinelPrototype node and four probes. Mounting tailored to each site.

Five measurements. One connected system.

Dissolved oxygenTemperatureTurbiditypHConductivity

More context between samples

Your next visit starts with a clearer picture.

Periodic samples are essential. Freshwater Sentinel adds scheduled measurements between those visits, helping your team explore when conditions change and where a closer look could be useful.

01

Follow changing conditions

Review oxygen, temperature and other water-quality trends over time, alongside your routine measurements and observations.

Understand the pattern
03

Check in from wherever you are

Review historical readings, data arrival and node status remotely through a cellular connection, without relying on site Wi-Fi.

Keep the site in view

Meet the system

From your site to your dashboard.

The prototype brings sensing, internal battery power, cellular telemetry and a remote dashboard together. Sensor selection, sampling and installation are planned around the site and the questions you want to answer.

Close-up of the Freshwater Sentinel prototype's four probes and mounting rack, with storage caps fitted
Actual prototype hardware, photographed with storage caps fitted. Deployment configuration is site-specific.

What you can follow

Dissolved oxygen & temperature
View oxygen and thermal patterns relevant to freshwater conditions.
Turbidity
Follow changes in water cloudiness and identify periods for closer investigation.
pH & conductivity
Review changes in acidity and electrical conductivity alongside other measurements.

The pictured sensor package uses four probes for these five measurements. Sensor selection depends on your monitoring goals and wet or dry site conditions. Readings need calibration and field reference checks to establish accuracy at your site.

  1. 01

    Measure

    Scheduled acquisition from a sensor package matched to the site, powered by an internal battery.

  2. 02

    Connect

    Batched cellular delivery of readings and node-health information.

  3. 03

    Review

    A remote dashboard for historical trends, data arrival and system status.

Start with your monitoring site

Which changes would you like to understand better?

We're talking with park managers, freshwater monitoring teams, consultants and lake-management contractors about where more frequent measurements could help.

Tell us about your site
01

Lakes, ponds & reservoirs

Explore trends between routine checks and add context around weather, treatment or other site events.

02

Streams & stormwater sites

Explore monitoring at sites with continuous water or dry periods. Suitability depends on the sensor package, installation, cellular coverage and service access.

03

Existing monitoring programs

Evaluate remote measurements alongside your current sampling methods and the decisions your team already makes.

Current development stage

Bench-tested. Ready to plan the next field evaluation.

Freshwater Sentinel is an integrated prototype. We are seeking partners to define a supervised deployment and evaluate its usefulness alongside existing reference measurements.

7 days

of integrated bench operation

168 / 168

scheduled hourly sensor cycles recorded

What comes next

Evaluate field accuracy, fouling, deployment durability and maintenance needs. The bench run demonstrates continuity; it does not establish field accuracy or maximum battery endurance.

A useful evaluation starts with a useful question.

First, we discuss your site and monitoring priorities. Then we agree on reference measurements, service access and what a successful evaluation would demonstrate. Scope and duration follow the site’s needs.

Practical questions

Understand the fit for your site.

Does it replace laboratory or regulatory sampling?

No. Freshwater Sentinel is being developed for supplemental monitoring and operational context. It does not replace required sampling, and field or regulatory suitability must be validated for the intended use.

Can it monitor a site that dries out?

Yes, with an appropriate sensor package. Dry-period operation and wet/dry transitions depend on the selected sensors and installation. We'll assess your site's conditions, sensor-care requirements and validation needs when planning a deployment. Water-quality measurements require suitable water contact for the selected probes.

Does the node need site power or Wi-Fi?

The prototype uses an internal battery and cellular data connection. It does not require mains power or site Wi-Fi. Cellular coverage, sampling frequency and the service plan need to be assessed for each location.

What happens after we get in touch?

We'll discuss your water body, current measurements and the gaps you'd like to understand. If there is a fit, we'll work through a supervised field-evaluation plan together. You do not need a finished specification to start the conversation.

Let's start with your monitoring needs

Tell us what you wish you could see between visits.

What water body do you manage? What do you measure today? Which changes matter most to your team? Let's explore where Freshwater Sentinel could help.

Start a conversation
Stephen LooFounder, Undrcurrent LLCsloo@undrcurrent.net(562) 781-4983