Solution Overview
Control building water flow between your underground and overhead tanks — no wiring required. Compact wireless units near each tank monitor water levels and control your pump automatically. Save water, save electricity, and stop worrying about overflows — all with a system that installs in under an hour and works through walls and floors.
A free mobile app provides local tank level display on your phone. For remote monitoring, alerts, and historical data access while you're away, an optional paid cloud service is available.
Why Link485 Beats Conventional Approaches
Compare installation effort, maintenance, and long‑term costs
Manual Checking
Traditional- Staff visits multiple times daily
- Delayed response to overflow/empty
- Human error in readings
- High ongoing labor cost
- No historical data or trends
Wired RS‑485
Traditional- Expensive cable trenching/conduit
- Disruption to residents for weeks
- Cable damage over time
- Difficult to retrofit existing buildings
- High installation and maintenance costs
Float Switches
Traditional- Basic ON/OFF control only
- No precise level measurement
- No remote monitoring capability
- Mechanical parts wear out
- Cannot prevent overflow reliably
Link485 Solution
Recommended- Wireless — no cable installation
- Millimeter‑level accuracy prevents water & energy waste
- Install in under 1 hour
- Zero maintenance on wireless link
- Cloud monitoring and alerts
- 70% cost savings vs wired
Technical & Business Advantages
Technical Advantages
Millimeter‑Level Sensor Accuracy
Ultrasonic or pressure sensors provide millimeter‑precise depth readings. Prevents water wastage from overflow and energy wastage from pumps running when OH tank valve is closed.
LoRa Penetration Through Floors
Long‑range LoRa radio passes through concrete, steel, and multiple floors. No line‑of‑sight required for high‑rise buildings.
Checksum Validation & Auto‑Retry
Built‑in data integrity checks ensure accurate readings. Corrupted frames are automatically retried until delivered correctly.
Multi‑Drop Support
Connect multiple tanks (UG, OH, intermediate sumps) on a single RS‑485 bus to one master via one Link485 Zero pair.
LED Indicators & App Monitoring
TX/RX LEDs show live activity. Mobile app visualizes traffic and allows channel configuration to prevent crosstalk.
Business Advantages
70% Lower Installation Cost
No trenching, conduit, or cable pulling. Wireless installation saves ₹50k–₹2L per building vs wired RS‑485 runs.
Install in Under 1 Hour
Complete single tank setup in under an hour. Minimal disruption to residents. No permits or civil work required.
No Cable Maintenance
Wireless link eliminates cable damage from rodents, moisture, wear, or accidental cuts during renovations.
Zero Downtime for Tenants
Install without shutting down water supply or disrupting residents. Perfect for occupied apartment buildings.
ROI in 6‑12 Months
Prevent overflow damage, reduce manual labor, optimize pump runtime. System pays for itself in under a year.
Prevents Overflow & Dry‑Run Damage
Real‑time monitoring with instant alerts prevents costly overflow damage and pump dry‑run failures.
Available Solution Configurations
Choose the right setup for your building and budget
Basic
Complete OH + UG tank automation with Link485 Zero pair and Air master
Components:
- 1× Link485 Zero pair (2 units)
- 1× Link485 Air (Modbus master)
- 2× RS‑485 Level Sensors
- 1× Relay/Contactor module
- WiFi router (optional, for app/BMS integration)
Multi‑Tank
Multiple UG/OH tanks with multi‑drop RS‑485 for campus or complex
Components:
- 1× Link485 Zero pair (2 units)
- 1× Link485 Air (Modbus master)
- 4‑6× RS‑485 Level Sensors
- 2× Relay/Contactor modules
- WiFi router (optional, for app/BMS integration)
Cloud‑Connected
Same as Basic with WiFi — emphasizes remote monitoring, alerts, and analytics
Components:
- 1× Link485 Zero pair (2 units)
- 1× Link485 Air (Modbus master)
- 2‑4× RS‑485 Level Sensors
- 1× Relay/Contactor module
- WiFi router (required for cloud)
4G Remote
Link485 4G master for properties without WiFi or for remote farm water systems
Components:
- 1× Link485 Zero pair (2 units)
- 1× Link485 4G (Modbus master)
- 2‑4× RS‑485 Level Sensors
- 1× Relay/Contactor module
- 4G SIM card (₹500/month data plan)
Not sure which configuration you need? Use our interactive calculator:
💰 Calculate Your System CostTechnical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Sensor Accuracy | Millimeter‑level precision | Ultrasonic or pressure sensors, ±1‑5mm typical; prevents water overflow and energy waste |
| Communication Protocol | Modbus RTU over RS‑485 | Industry‑standard, works with 99% of sensors |
| Wireless Technology | LoRa (Long Range) | 433/868/915 MHz ISM bands (region‑specific) |
| Wireless Range | 400m typical, up to 2km optimal | Depends on mounting height and obstacles |
| Update Frequency | Configurable 1‑10 seconds | Adjustable via app or Modbus registers |
| Power Supply | 12‑24V DC at each endpoint | Typical 2W consumption per unit |
| Operating Temperature | -20°C to +70°C | Industrial‑grade components |
| Enclosure Rating | IP20 (DIN) / IP65 (outdoor) | Choose based on installation location |
| Installation Time | Under 1 hour typical | Per single OH/UG tank setup including sensor mounting and testing |
| Certifications | WPC ETA, CE/RED, FCC Part 15 | Compliant for India, EU, USA |
How It Works: Step‑by‑Step
From installation to operation in 2‑4 hours
Mount OH Sensor & Zero Unit
Install RS‑485 level sensor in overhead tank. Mount Link485 Zero unit nearby (rooftop or tank room). Connect sensor to Zero via RS‑485.
Install UG Sensor, Zero, Air & Pump Controls
At ground level, install UG tank sensor, Link485 Zero, Link485 Air (master), and connect relay/contactor to pump. Wire all via RS‑485 to Air master.
Power On Units (Auto‑Pair)
Apply 12‑24V DC power to both Zero units and Air master. Zero units automatically pair wirelessly in seconds — no configuration needed.
Configure Thresholds via App
Use Link485 mobile app to set pump start/stop levels, overflow alerts, and dry‑run protection thresholds. Adjust update frequency if needed.
System Operational — Pump Automation Begins
System is live. Pump automatically starts when OH tank drops below threshold and stops when full. Alerts sent for anomalies. Monitor via cloud dashboard.
Get a Bill of Materials for Your Building
We'll recommend sensors, controllers, and connectivity for your tank system.