Flow-Metering Smart Hydrant

Smart Above-Ground Fire Hydrant (Flow-Metering Type) · SS-ZN-II

The baseline smart hydrant — provides continuous real-time monitoring of flow, pressure, water-on status, tilt angle and battery level at every deployment point, with GPS location and cloud reporting. Operates identically to a standard SS pillar hydrant mechanically — no lock-control, no card requirement. Any authorised operator with a hydrant key can open it.

Specify for municipal road networks, new residential developments and industrial sites where monitoring and data logging are required but access control is not — for example, where fire brigade deployment speed must not be impeded by a card authentication step.

Lock-Control Flow Smart Hydrant

Smart Above-Ground Fire Hydrant (Lock-Control Flow Type) · SS-ZN-III

Adds a card-based electronic lock-control module to all the monitoring functions of the ZN-II. The valve operating mechanism is electronically locked in the closed position by default — the lock releases only when a registered RFID card or authorised mobile app is presented within the detection range. Unauthorised operation triggers an immediate cloud alarm and push notification to the registered authority.

Every authorised access event is logged: card ID, timestamp, GPS location, flow volume drawn and valve-open duration. The water authority or property manager has complete visibility of who operated which hydrant, when, for how long and how much water was drawn — at every point on the network, from a single cloud dashboard.

Smart Cap — Retrofit Monitor

Smart Cap · GZG Series

The GZG smart cap is a retrofit sensor unit that replaces the standard top cap on any existing GB above-ground hydrant — instantly adding tilt monitoring, flow detection and GPS location to existing infrastructure without excavation, pipework modification or hydrant replacement. The cap connects to the hydrant's existing top valve nut and communicates via the same IoT/cloud platform as the ZN-II/III hydrant series.

This makes the GZG the lowest-cost path to a monitored hydrant network for municipalities or property managers with large numbers of existing standard hydrants — a full SS-ZN-II/III replacement is only required where full flow metering and pressure logging are needed; the GZG provides the most critical monitoring functions (tilt, tampering, GPS) at a fraction of the cost.

📊 Flow Metering

An integrated ultrasonic or electromagnetic flow sensor measures the volume of water passing through the hydrant on each deployment. The cumulative flow volume per event is transmitted to the cloud platform with the start and end timestamp — giving the water authority a complete record of every draw from every hydrant on the network. For SS-ZN-III lock-control models, flow volume is attributed to the specific card ID that unlocked the valve, enabling individual accountability for every use event including non-fire water draws by authorised contractors.

📈 Pressure Monitoring

A solid-state pressure transducer continuously monitors static supply main pressure at the hydrant inlet. Readings are logged at configurable intervals (typically every 15–60 minutes) and transmitted to the cloud platform. Any reading below the design minimum or above the maximum triggers an immediate cloud alarm. This allows the water authority to detect supply main faults, burst pipes, illegal connections and pump station failures in real time — before they result in deployment failure at a fire incident.

💧 Flow-On Detection

A dedicated water-flow sensor detects the onset of flow at any time — including when the hydrant is opened without a registered card (for ZN-II models) or without a valid card (ZN-III alarm trigger). This distinguishes between the hydrant being operated legitimately (flow + authorised card) and the hydrant being operated without authorisation (flow + no card, or flow outside normal deployment parameters). Immediate alert is sent to the cloud platform and to designated contact numbers when unexpected flow is detected.

📐 Tilt Monitoring

A MEMS accelerometer/inclinometer continuously measures the tilt angle of the hydrant body in two axes. When the tilt angle exceeds the set threshold in any direction — indicating vehicle impact, ground subsidence or vandalism — an immediate alarm is sent to the cloud platform with the hydrant's GPS coordinates and the magnitude of tilt. This typically shortens the time between a vehicle impact event and a maintenance response from months (next scheduled inspection) to hours (immediate cloud alert dispatch), dramatically reducing the probability of an impaired hydrant being deployed at a fire incident.

📍 GPS Location & Navigation

Each hydrant's GPS coordinates are recorded at commissioning and continuously verified — any movement of the hydrant (theft, relocation without system update) is detected and alerted. The GPS data is used by the cloud management platform to display every hydrant as a georeferenced asset on a real-time map — allowing fire commanders, water authority engineers and property managers to identify the nearest available hydrant to any incident location and navigate to it via the mobile app without relying on outdated paper maps or legacy GIS data.

🔋 Battery Monitoring + 🔐 Lock Control

Battery monitoring: The internal lithium battery state-of-charge is transmitted to the cloud platform. Low battery alert is generated when the battery falls below the set threshold, ensuring maintenance teams replace batteries before they expire in the field — preventing silent sensor failure that would remove a hydrant from the monitoring network without visible indication.

Lock control (ZN-III only): The electronic solenoid lock module physically prevents the valve operating square from rotating without a valid RFID card or authorised app command. The lock is fail-safe — in the event of battery depletion, the lock defaults to the unlocked position to ensure fire brigade access is never impeded. Fire override mode allows the brigade to unlock any registered hydrant remotely via the cloud platform during a declared incident.