The hardware
Our own sealed logging unit counts every litre at the tap, reads water quality, and sends a signed reading over the cellular network straight into a tamper-evident record - the evidence layer that turns safe water into verifiable, monetisable impact.
Patent-pending · Hydrosun TechnologiesOASISLink turns the telemetry into a monitoring dashboard a verifier can trust - live flow and quality per unit, fleet status, and the impact that backs each credit.
| Unit | Status | Flow | TDS | Last reading |
|---|---|---|---|---|
| OASIS-UF-79 | Active | 94.5 L/min | 516 ppm | 03/08 |
| OASIS-UF-57 | Active | 101.9 L/min | 288 ppm | 03/08 |
| OASIS-UF-92 | Active | 102.4 L/min | 395 ppm | 03/08 |
| OASIS-UF-93 | Active | 97.9 L/min | 418 ppm | 03/08 |
Flow (YF-B10) and water-quality (TDS) measured on the device, with an independent analog meter as a cross-check.
Reports over cellular on a schedule, with SD-card and store-and-forward backstops so readings survive outages and sync later.
Every reading is hashed (SHA-256) and stored append-only, sealed into a monthly hash-chain that anyone can independently re-verify.
A multi-tenant dashboard maps every unit, charts flow and quality, and surfaces alerts - with role-based access and a full audit trail.
Solar with battery backup and smart sleep/wake keep it reporting for years with no site visits.
The verifiable, timestamped stream is the backbone for issuing carbon credits from safe drinking water, aligned to Gold Standard.
OASISLink doesn't just read a meter. It emits the specific indicators that results-based programmes, water standards and impact funders already oblige you to report upward — at the device level, timestamped and tamper-evident. The monitoring you'd pay for separately is the same stream that unlocks the disbursement or the credit.
| Indicator | Who already requires it | OASISLink |
|---|---|---|
| Functionality & uptime | “Sustainably functioning water service” — World Bank · SURWASH | Live Reports every 2h, per device |
| Litres delivered → LPCD | “Litres per capita per day” — India · Jal Jeevan Mission | Live Metered flow + population |
| Continued / sustained use | “Beneficiaries still using the source” — FCDO WASH Results · Gold Standard | Live Daily active-use days |
| Hours of supply / outage | “Outage duration” — India · Jal Jeevan Mission | Live Cadence + flow gaps |
| GPS-verified location | “Location via satellite / GPS device” — Gold Standard | Live GPS per reading + satellite check |
| Water quality (TDS / EC) | “Point-of-use water quality” — Punjab PRSWSSP · WHO | Live TDS on device; microbial via lab |
| Revenue collection rate | “Consumers billed and paid” — Kenya · Water Sector Trust Fund | Paired With OASIS ATM |
| Collection efficiency | State performance action plans — Nigeria · SURWASH | Paired With OASIS ATM |
| O&M cost recovery from tariff | “75% of O&M from tariff” — Punjab PRSWSSP | Paired With OASIS ATM |
| Non-revenue water | “NRW reduction targets” — SURWASH · Kenya WSTF | Paired With a source meter |
| Microbial quality compliance | “Samples passing microbial standard” — Gold Standard (SDWS 18) | Roadmap Lab samples / bio-sensor slot |
| Free chlorine residual | “Chlorine residual monitoring” — Jal Jeevan Mission · UNHCR | Roadmap Reserved sensor input |
Most water programmes track delivery with spreadsheets and the occasional site visit. OASISLink measures every litre and locks it into an audit-ready record.
| Manual reads / spreadsheets | OASISLink dMRV | |
|---|---|---|
| Data collection | Site visits, manual reads | Continuous per-unit telemetry over cellular |
| Integrity | Editable spreadsheets | Append-only, SHA-256 tamper-evident ledger |
| Verification | Hard to audit | Audit-ready - traceable end to end for a VVB |
| Coverage | Sample checks | Every litre, every unit |
| Carbon | Not credit-ready | The MRV backbone for Gold Standard credits |
| Access | Siloed files | Multi-tenant, co-branded portal |
