1. Introduction: The Invisible Challenge of Urban Water Infrastructure
As global urbanization intensifies, the resilience of underground water infrastructure has become a critical benchmark for municipal safety. Urban drainage systems face a dual threat: the increasing frequency of catastrophic waterlogging and the persistent environmental degradation caused by “black and odor” water bodies. Monitoring these assets is an immense technical challenge. Sensors must operate in confined spaces, survive aggressive atmospheres saturated with corrosive gases like hydrogen sulfide (H2S), and provide high-accuracy data despite significant signal interference and sediment-induced measurement drift.
The transition to “Smart Drainage” requires more than just connectivity; it demands hardware ruggedized for the subterranean front line. Honde Technology provides an integrated ecosystem of IP68-rated, high-precision sensors designed to mitigate urban flood risks and pinpoint the sources of illegal sewage discharge, ensuring that infrastructure remains resilient and cities remain habitable.
2. The Core Hardware: Precision Sensing in Harsh Environments
For municipal engineers, data reliability is paramount. Honde Technology’s non-contact radar and ultrasonic sensors eliminate the maintenance burdens and failures associated with traditional submerged equipment, providing a compact footprint ideal for manhole integration.
The 3-in-1 Powerhouse (RD-600/RD-600S)
The RD-600 series is the definitive solution for monitoring main sewer lines. This integrated unit combines a radar water flowrate meter, a radar water level gauge, and a total flow volume processor.
- Engineering for Half-Pipe Scenarios: Unlike traditional meters, the RD-600 series is optimized for the complex “half-pipe” states common in urban sewers, ensuring accurate flow calculations even when pipes are not full.
- The “S” Variant Advantage: We specifically recommend the RD-600S for sewage environments. It features a specialized anti-corrosion coating designed to withstand the highly acidic and corrosive gases produced by domestic and industrial waste.
- Technical Performance: With a flowrate accuracy of ±0.01m/s (±1% FS) and water level accuracy of ±2mm, it provides the granularity required for predictive flood modeling.
Redundant Water Level Monitoring
To prevent “backflow” onto city streets, redundant level monitoring is a strategic necessity. Our range covers everything from shallow street gutters to deep-well reservoirs.
| Model | Measurement Range | Accuracy | Technology Detail |
| RD-300S-01 (Radar) | 0.01 ~ 7.0 m | ±2 mm | 60GHz frequency; 10mm measurement dead zone |
| RD-300-01 (Radar) | 0.01 ~ 40.0 m | ±3 mm | 24GHz frequency; Ideal for deep shafts and bridges |
| RD-RWLP654-01 (Radar) | 0 ~ 65 m (Custom >65m) | ±1 mm | 76GHz–81GHz High-Frequency Radar; extreme precision |
| RD-UWLH3-01 (Ultrasonic) | Up to 3.0 m | ±(1% Reading + 10mm) | 22cm Blind Zone; economical choice for shallow channels |
3. Beyond the Flow: Water Quality and Toxic Gas Safety
A truly resilient city monitors the chemical and safety dimensions of its drainage network. Our water quality and gas sensors are built to provide early warning of environmental crimes and life-threatening conditions.
Pollution Tracking and Industrial Resilience
The RD-ETTSD-01 (4-in-1 EC/TDS/Salinity/Temp) and RD-AMM-02 (Ammonia Nitrogen) sensors are critical for the control of “black and odor” water. The RD-ETTSD-01 is engineered with “up to four isolations” and a 3000V protection grade, ensuring electronic stability against the power surges and electromagnetic interference common in urban grids. Housing options include PPS or 316L stainless steel to combat chemical erosion.
The Detection Mission:
- Mission: Identify Illegal Discharge. At rain-sewage diversion points, if the RD-600S detects flow during dry weather while the EC or Ammonia sensors report spikes (e.g., Ammonia ranges of 0.1-1000ppm), the system automatically flags illegal sewage dumping.
- Mission: Prevent Infrastructure Explosion. By monitoring methane (CH4) concentrations (0-100% LEL, ±5%FS), the system warns of explosive gas accumulation in the pipe network.
- Mission: Personnel Safety. The RD-EPGD-01 monitors hydrogen sulfide (H2S) (0-100ppm, ±3%FS) within its cast aluminum explosion-proof enclosure, providing vital alerts to maintenance teams before they enter confined spaces.
4. The Connectivity Layer: IoT and Wireless Data Transmission
Data only becomes actionable when it is delivered reliably. The Honde Technology ecosystem bridges the gap between the manhole and the management center.
- Wireless Flexibility: Our sensors support a comprehensive suite of protocols, including LoRa/LoRaWAN, GPRS/4G, and WiFi. This ensures connectivity regardless of whether the site is in a remote reservoir or a dense urban canyon.
- Hondetech Cloud Ecosystem: Our “Smart Drainage” platform integrates MQTT Cloud Integration for seamless third-party software handshakes.
- Edge Intelligence: Features like Edge Storage and Break-point resume ensure that data is never lost during network outages.
- Remote Management: Engineers can perform remote parameter settings and software upgrades without the risk of a confined-space entry.
- Operational Insight: The platform provides historical report analysis and real-time alert notifications via SMS or App, triggered the moment water levels or gas thresholds are breached.
5. Strategic Application Scenarios: Where Technology Meets the Ground
| Application Scenario | Primary Equipment Used | Core Objective |
| Main Sewer Pipes / Manholes | RD-600S / RD-EPGD-01 | Half-pipe flow monitoring and worker safety from H2S/CH4. |
| Tunnels & Underpasses | RD-300 series / RD-UWLH3-01 | Urban flood prevention and automated waterlogging alerts. |
| Rain-Sewage Diverters | EC & Ammonia Nitrogen Sensors | Rapid identification of illegal sewage discharge during dry weather. |
| Open Channels/Reservoirs | High-Freq Radar/Ultrasonic | Level monitoring for black-odor water control and flood mitigation. |
6. Conclusion: The Future of Urban Water Management
By integrating high-precision 80GHz radar, chemically resilient water quality probes, and explosion-proof gas sensing into a unified IoT framework, Honde Technology enables a proactive approach to municipal management. Our solutions are designed to thrive in the world’s most demanding underground environments, delivering the data necessary to protect both urban infrastructure and the citizens who rely on it.
Honde Technology remains steadfast in its commitment to “Empowering Urban Infrastructure with Technology & Data.” Our manufacturing processes are rigorously audited, holding CE, RoHS, and ISO 9001 (TUV SUD certified) international standards to guarantee field reliability.
Contact Us: Company: Honde Technology Co., Ltd. Website: www.hondetechco.com Email: info@hondetech.com
For more sensor information,
please contact Honde Technology Co., LTD.
WhatsApp: +86-15210548582
Email: info@hondetech.com
Company website: www.hondetechco.com
Post time: Mar-19-2026