News Details

Why End-Point Monitoring Matters in Tap Water Networks
Water that leaves the treatment plant in perfect condition does not always arrive at the tap that way. Across kilometers of aging distribution pipework, water quality can deteriorate significantly:

•Residual chlorine dissipates — leaving water vulnerable to bacterial regrowth in long dead-end branches
•Turbidity increases — pipe corrosion, sediment disturbance, and pressure transients release particles into the flow
•pH shifts — corrosion reactions with pipe materials alter water chemistry en route
•Contamination events — backflow, cross-connections, and main breaks introduce contaminants at any point in the network

Monitoring only at the treatment plant outlet misses all of these risks. End-point and mid-network monitoring is now required by China's drinking water safety standards — and is rapidly becoming the global norm for urban water utilities.

Recommended Monitoring Points in a Tap Water Network

The KNF-400B is designed for deployment at all of these locations — from main pump stations to community secondary supply rooms.

Introducing the KNF-400B — Network Water Supply Quality Monitoring System
The KNF-400B is Kainafu's dedicated online water quality monitoring system for tap water distribution networks. It meets the full requirements of China's Standards for Drinking Water Hygiene and is engineered for continuous, unattended operation at remote network nodes.

Parameters Monitored

Key Features of the KNF-400B

7-Inch Touch LCD Display
Real-time parameter readings, trend curves, historical data, and alarm records are all visible on the built-in 7-inch touch screen — no laptop or external device required for on-site review.
Built-In Flowmeter
The KNF-400B includes an integrated flowmeter (settable to 300–500 mL/min recommended operating range) that continuously circulates a representative water sample through the measurement cell — ensuring sensor readings reflect actual network water, not stagnant sample.
Automatic Sewage Discharge
A built-in automatic purge system flushes accumulated sediment from the water sampling pipework on a timed cycle — maintaining measurement accuracy and reducing manual maintenance requirements.
Flexible Data Connectivity

RS-232 / RS-485 output for wired SCADA integration
GPRS / 4G wireless for cloud platform upload
Adjustable reporting interval — upload frequency configurable to match network management requirements

Cloud Platform + WeChat Alerts
All data is automatically uploaded to the Kainafu Water Quality Monitoring Cloud Platform at ion.onetestinc.com. Configure alarm thresholds for each parameter and receive instant push notifications via the mobile APP or WeChat when a reading exceeds limits — enabling rapid response before a public health incident develops.

Flow Statistics
The KNF-400B records cumulative water consumption data, helping network operators detect leakage by comparing metered supply against expected consumption — a valuable secondary function for network loss management.
Optional Water Leak Alarm
An optional leak detection sensor triggers an automatic alarm and can be configured to close the water inlet valve automatically on detection — protecting equipment rooms and pump stations from water damage.

Application Scenarios
•Municipal water supply networks — continuous quality surveillance at DMA inlets, booster stations, and end-point nodes
•Secondary water supply systems — monitoring pump rooms, underground cisterns, and rooftop tanks in residential and commercial buildings
•Rural tap water projects — unattended remote monitoring with 4G cloud connectivity where manual inspection is impractical
•Swimming pools and recreational water facilities — continuous residual chlorine and pH monitoring for bather safety
•Industrial facility water supply — verifying incoming water quality for process applications sensitive to chlorine, pH, or turbidity

Ready to Protect Your Water Network?
The KNF-400B is available factory-direct from Kainafu with full technical support, OEM customization options, and rapid delivery.

Email: knfeco@knfsensors.com
Website: www.knfsensors.com
Cloud platform: ion.onetestinc.com
Shenzhen Kainafu Technology Co., Ltd. — Care for Environments and Health.