Rain Water Harvesting System (RWHM)
Turn unmeasured rooftop rainfall into verified, auditable litres of conserved water for sustainability, BRSR, and CGWA compliance.
Introduction
See how much rainwater you actually capture, as it happens.
Many commercial parks and factories have rainwater harvesting structures, but few know if they work or how many cubic meters are collected. Bulfro Aqua ESG’s Rain Water Harvesting Monitoring (RWHM) system equips your retention tanks, recharge pits, and filters with automated ultrasonic level sensors, flow meters, and cloud telemetry. Every monsoon storm turns into an auditable conservation number you can put directly into your sustainability and ESG disclosures.
Conservation Engineering
Verified Water Neutrality Accounting
Corporate sustainability targets and municipal building bylaws require facilities to harvest rain. Without instrumentation, harvested volumes are based on mere theoretical estimates that auditors routinely question.
Bulfro Aqua ESG RWHM monitors the intake pipe from rooftop filter pits, logs storage capacity inside RCC/FRP tanks, and records volumes routed to groundwater recharge shafts. Inflow and overflow data streams live to your dashboard.
Core Capabilities
Complete Harvesting Telemetry & Control
Designed for industrial plants, IT parks, commercial campuses, and green building certifications.
Continuous Tank Telemetry
Ultrasonic level sensor monitors water column inside sump or overhead tanks with ±5 mm accuracy, displaying % volume.
0 to 10 m RangeInflow & Recharge Flow Metering
Tamperproof digital flow meters measure raw stormwater inflow from gutters and volumes recharged into injection wells.
Real-Time Inflow RateCellular & Wi-Fi Cloud Sync
Automated 4G / GPRS / Wi-Fi unit uploads timestamped tank levels and harvest volumes every 15 minutes to the Bulfro Aqua ESG Cloud.
4G / GPRS / Wi-FiAutomated Overflow Logging
Tracks overflow occurrences during torrential rainfall events, logging uncaptured discharge to optimize tank expansion.
Overflow Event DetectionAudit-Ready Sustainability Reports
Export certified monthly harvest certificates with rainfall correlation graphs for IGBC, LEED, and ESG annual disclosures.
LEED / IGBC / ESG ReadyEngineering Data
Technical Specifications
| Specification | Details |
|---|---|
| Tank Level Sensor | Non-contact Ultrasonic Transducer with temperature compensation |
| Level Range | 0.3 m to 5.0 m (standard) / 0.5 m to 10.0 m (deep underground sumps) |
| Level Accuracy | ±0.25% of span or ±5 mm (whichever is greater) |
| Inflow Flow Measurement | Optional inline electromagnetic or insertion paddle flow meter |
| Valve Actuation Output | 12V/24V DC or 230V AC relay output for motorized first-flush ball valve |
| Communication Interfaces | 4G / GPRS / Wi-Fi cellular telemetry + RS-485 Modbus RTU |
| Power Supply Options | 10W Solar Panel + Rechargeable 12V Lithium Battery / 230V AC mains |
| Battery Autonomy | > 30 days continuous operation in cloudy/monsoon conditions |
| Enclosure Protection | Sensor: IP68 waterproof; Surface Transmitter: IP65 outdoor enclosure |
| Operating Temperature | -10°C to +60°C |
| Compliance Compatibility | CGWA Rainwater Harvesting Guidelines, IGBC / LEED Water Efficiency Credits |
RWHM Series System Packages
| Model Code | Tank Sensor | Inflow Meter | Power |
|---|---|---|---|
| BRWHM-BASIC | Ultrasonic 5m | Optional | 230V AC / Battery |
| BRWHM-SOLAR | Ultrasonic 5m/10m | Inflow Telemetry | 10W Solar + Li-Ion |
| BRWHM-AUTO | Ultrasonic + Inflow | First-Flush Valve | Solar / 230V AC Grid |
Media Gallery
Hardware & Rooftop Node
Why Choose Bulfro Aqua ESG RWHM
Designed for Autonomous Rooftop & Sump Telemetry
Robust field hardware delivering reliable water accounting season after season.
Live Tank Volume on Mobile
Check harvesting tank storage from anywhere. Real-time water percentage indicators notify operators when tanks reach overflow limits.
Autonomous Solar Autonomy
Operates completely independently of grid power. A 10W monocrystalline solar panel and lithium battery provide continuous uptime.
Non-Contact Ultrasonic Head
The IP68 ultrasonic sensor mounts directly above the water surface, immune to dirt, leaves, suspended debris, and tank rust.
Automated Monthly ESG Audit
Generates audit-ready PDF reports summarizing cumulative rainfall, total captured volume, and aquifer recharge quantities.
Product Configuration
Select the RWHM Setup for Your Facility
Customize your harvesting telemetry configuration for storage tanks, recharge pits, and filters:
Tank Type
Sensors Included
Power Source
Automated Valves
Complete Turnkey Water Harvesting Auditing
Bulfro Aqua ESG provides site catchment calculation, tank ultrasonic sensor calibration, flow meter plumbing, solar commissioning, and automated cloud dashboard access.
Frequently Asked Questions
Frequently Asked Questions
Find direct answers to common questions regarding RWHM rainwater telemetry, sensor mounting, ESG audits, and first-flush diverters.
The system combines non-contact ultrasonic level readings from your storage tank with known tank geometry (diameter, length, and depth). Alternatively, an inline digital flow meter on the collection main directly logs total cubic meters entering the tank or recharge shaft.
Yes. The non-contact ultrasonic sensor mounts through a standard 2-inch threaded port or flange on top of any existing concrete, masonry, steel, or Sintex tank without emptying or modifying the tank structure.
When the initial rain starts, the first 1–2 mm of runoff washes roof dirt and airborne particulate into a diversion drain. Once the preset first-flush volume passes, the RWHM controller automatically signals a motorized valve to divert clean, filtered water into the main storage tank.
Yes. Central Ground Water Authority NOC terms mandate that industrial groundwater users implement artificial recharge or harvesting structures with verifiable proof. Bulfro Aqua ESG RWHM provides digital, timestamped PDF reports showing exact recharge volumes that satisfy regulatory inspectors and corporate ESG auditors.
When the tank reaches 95% capacity, the system triggers high-level SMS and push alerts to operators and can actuate motorized valves to divert excess water into artificial recharge shafts or municipal stormwater lines, avoiding tank overflow flooding.
Yes. The solar package includes a monocrystalline panel and a weather-sealed lithium battery pack, providing over 30 days of autonomous operation without AC power, making it ideal for remote rooftop locations.
Turn Every Rainstorm into Certified Water Conservation
Don’t leave your rainwater harvesting achievements unmeasured. Share your rooftop area, storage tank dimensions, and site layout with Bulfro Aqua ESG’s sustainability team for an instrumented RWHM proposal.