Drinking water sources
Screen hand pumps, wells and village supplies.
- Jal Jeevan Mission sources
- Hand pumps and borewells
- School and anganwadi supply
RESEARCH PARTNERSHIP / 05
Developed withIndian Institute of Technology Bombay#3 in engineering, NIRF 2025
Prototype validatedDelivered by Rispri Labs
Portable water testing.
Four contaminants. One device.
Rispri Labs delivers a compact, battery-powered water testing device, developed with IIT Bombay, that measures arsenic, fluoride, chromium (VI) and iron at the source and compares results with WHO limits. Lab-grade screening, wherever the water is.
RESEARCH TO REALITYRispri Labs × IIT Bombay
IIT Bombay
What it means for you
Four-contaminant water testing, on site.
4 in 1
arsenic, fluoride, chromium and iron measured with one device.
Minutes
not days: results at the well, pump or outlet.
740 g
battery-powered and light enough for any field visit.
Performance
A field laboratory in a 740 g box.
Arsenic, fluoride and chromium are invisible, and most villages and sites are hours from a laboratory. This device brings colorimetric testing to the source, so unsafe water is flagged the same day.
- 4
- Contaminants measured: arsenic, fluoride, chromium (VI) and iron
- 740g
- Weight, battery-powered for field use
- 28days
- Reagent stability
- WHO
- Results compared directly with WHO limits
Figures are from the research team's prototype validation against laboratory instruments. Performance on your stream is confirmed in our laboratory before design.
Challenge and response
The problems this solves.
- 01The challenge
Samples travel for days to a distant laboratory.
How we solve itTest at the source and read the result on the spot.
- 02The challenge
Field kits test one contaminant at a time.
How we solve itOne device measures four contaminants in sequence.
- 03The challenge
Lab instruments are costly and need trained analysts.
How we solve itLow-cost, built from standard parts, with minimal training.
- 04The challenge
Unsafe sources stay in use while results are awaited.
How we solve itFlag unsafe water the same day and act on it.
How it works
The process, step by step.
- 1
Sample
Water is mixed with a selective reagent in a cuvette.
- 2
Select
A rotary switch picks arsenic, fluoride, chromium or iron.
- 3
Measure
An LED tuned to that reaction's colour reads the change through a photodetector.
- 4
Report
A microcontroller converts the reading to concentration in ppm or ppb.
Use cases
Where on-site multi-contaminant water testing delivers.
Public health monitoring
Map arsenic and fluoride hotspots quickly.
- District surveillance
- Field testing teams
- Contamination response
Water utilities
Check raw and treated water at every stage.
- Raw water intake
- Treatment plant outlet
- Distribution network
Industrial effluent screening
Check chromium and iron before discharge.
- Electroplating and tanneries
- Steel and metal works
- ETP outlet checks
RO and removal plant checks
Confirm that arsenic and fluoride removal is working.
- Community RO plants
- Defluoridation units
- Arsenic removal plants
Teaching and training
Hands-on water chemistry for students and staff.
- Engineering colleges
- School laboratories
- Operator training
Comparison
How it compares.
| Factor | Sending samples to a laboratory | Rispri solution |
|---|---|---|
| Turnaround | Days, including transport | Minutes, at the source |
| Contaminants | Separate test for each parameter | Four in one device |
| Equipment | Spectrophotometer or ICP in a laboratory | Battery-powered, 740 g |
| Skills | Trained analyst | Minimal training |
| Accuracy check | Reference methods | Cross-verified against UV-Vis, ICP-AES, ICP-MS and ion-selective electrodes |
Standards and regulations
Designed around the rules that apply to you.
We design each system to meet your consent conditions and the regulations for your sector, and our laboratory reports against them.
- IS 10500:2012Indian drinking water limits for arsenic, fluoride, chromium and iron.
- WHO drinking water guidelinesInternational guideline values the device reports against.
- Jal Jeevan Mission water quality frameworkField testing of drinking water sources by communities.
- Environment (Protection) Rules, 1986Discharge limits for hexavalent chromium and iron.
Industries served
Built for the sectors that need it most.
Why Rispri
Institute science. Industrial delivery.
Institute-developed technology
Built on patented and peer-reviewed research from our partnership with IIT Bombay.
Tested on your stream
Our accredited laboratory characterises your water or waste before design and verifies results after.
Engineering since 1999
The team that builds ETPs, STPs and ZLD plants across India takes each solution from pilot to full scale.
One accountable partner
Design, supply, installation, commissioning, operation and testing under one contract.
Questions
Frequently asked questions.
Which contaminants does it measure?
Arsenic (III and V), fluoride, hexavalent chromium and iron (II). Results are shown in ppm or ppb and compared with WHO limits.
How accurate is it?
Results were cross-verified against laboratory UV-Vis spectrophotometers, ICP-AES, ICP-MS and ion-selective electrodes on tap, canal, lake and river water. For regulatory reporting, our NABL-accredited laboratory confirms results.
Does it need mains power or a laboratory?
No. It runs on two 9 V batteries, weighs about 740 g and measures 19.5 × 12.5 × 8 cm.
How long do the reagents last?
Up to 28 days.
How ready is the device?
It is a validated prototype at TRL 5, tested on real water samples. We deploy it with field teams through pilot programmes.
Research partnerships
More solutions from our partnerships.
THE NEXT STEP
Prove it on
your own stream.
Send us a sample or tell us about your site. We will test it, recommend a configuration and set up a pilot.
Request a pilot