In major grid distribution hubs and bulk billing points, conventional full-bore circular flowmeters frequently experience asymmetric velocity vector profiles caused by upstream piping bends, resulting in inaccurate fiscal metering. The KROHNE WATERFLUX 3300 resolves this fundamental hydro-dynamic limitation through its signature rectangular sensor geometry.
By physically transitioning the pipeline cross-section into a calculated, reduced rectangular bore, the sensor natively conditions and linearizes the velocity vectors across the electromagnetic field. This mechanical velocity profile optimization allows the meter to maintain a continuous, ultra-stable 1000:1 turndown ratio. It effortlessly tracks night-time drop flows down to near-zero velocities with a certified billing accuracy of ±0.2% of measured value (MV).
For water authorities evaluating parallel municipal cross-connections—where specialized rectangular profiles run alongside standard full-bore circular water channels—the field-proven [Endress+Hauser Proline Promag W 400 Flowmeter] serves as a perfect heavy-duty comparative asset to balance comprehensive pipeline volumetric control.
Compact underground valve vaults, municipal pumping skids, and booster stations rarely provide the spatial clearances required for long stabilizer pipe runs. The WATERFLUX 3300 eliminates these space constraints:
True 0D Upstream / 0D Downstream Layout: Because the internal rectangular constriction suppresses fluid swirling natively, the meter is completely independent of upstream hydraulic interferences. It achieves a certified 0D/0D installation footprint, meaning it can be bolted directly behind space-constricting control valves, T-junctions, or reducers without drifting from its factory calibration curve.
NAMUR NE 107 Predictive Diagnostics: Driven by advanced high-frequency magnetic coil excitation, the transmitter electronics deliver complete sensor and process diagnostics in full compliance with the NAMUR NE 107 standard. The system actively monitors and flags coating build-up, electrode short circuits, fluid conductivity drops, and air entrainment before severe faults manifest.
Integrated Process Architecture: For distributed control locations where process field networks dictate ultra-compact, space-saving terminal connections right at the liquid line, pairing the regional loop with a localized [Endress+Hauser Proline Promag E 100 Magmeter] ensures an optimized, high-speed digital infrastructure.
Preserving the chemical purity of public drinking supply infrastructure is a critical operational mandate. The core measuring tube of the meter is lined with a high-durability, bio-sourced Polyamide Polymer 11 (Rilsan® coating). This continuous protective barrier exhibits an ultra-low surface roughness that prevents calcification, fat deposits, and bio-fouling.
It holds premier global potable water standards including NSF, WRAS, DVGW, and ACS. Additionally, for thermal heating and district chilling loops, the system is fully approved under the MID MI-004 custody certificate.
| Metric Feature | Certified Engineering Threshold |
| Measurement Principle | Electromagnetic (Inductive Signal Evaluation) |
| Metrological Accuracy Scale | Elite ±0.2% (or ±1 mm/s) of Measured Value (MV) |
| Dynamic Turndown Capability | Ultra-wide range reaching up to 1000:1 |
| Fiscal Custody Approvals | MID MI-001, OIML R49, MID MI-004 (Heat Metering standard) |
| Hydraulic Flow Profiling | Native conditioning allowing 0D Upstream / 0D Downstream spacing |
| Kinetic Leak Detection Array: | To map and cross-reference bulk volumetric data against localized mechanical pressure drops across long-distance distribution lines, adding a dedicated [Endress+Hauser Deltabar PMD75B Smart Differential Pressure Transmitter] into the layout provides rapid micro-leak pinpointing. |
| Operational Component | Engineering Value |
| Nominal Flange Diameters | EN (1092-1): DN25…600 | ASME (B 16.5): 1″…24″ | JIS: 25…600A |
| Auxiliary Process Connections | Male thread variations including G1, G1½, and G2 profiles |
| Internal Sensing Liner | Fully bonded Polyamide Polymer 11 (Rilsan® liner) |
| Maximum Static Pressure Limit | 16 barg / 230 psig |
| Process Liquid Temperature | -5°C to +70°C (+23°F to +158°F) |
| Communication Interface | Technical Description |
| Native Digital Protocols | PROFINET, Modbus RTU, HART®, Profibus-PA/DP, FOUNDATION Fieldbus |
| Analogue Loop Channels | Fully isolated 4…20 mA current outputs |
| Hardware Output Contacts | Integrated Limit switches, Pulse, Frequency, and Status alarms |
| Global Water Compliance | DVGW, NSF, TZW, KTW, WRAS, KIWA, ACS |
SCADA Protocol Matching: For heavy industrial fieldbus environments, specify the transmitter with native PROFINET or Profibus-DP boards. For remote, solar-assisted water stations or district metering locations, utilize low-power Modbus RTU telemetry to conserve field energy.
Safety Loop Warning: The WATERFLUX 3300 is structurally customized for advanced custody transfer and clean municipal water utilities. If your chemical dosing skid or plant scheme manages highly corrosive hazardous chemical injection loops, or functional safety emergency shutdown circuits (ESD) requiring native compliance, you must step up to a heavy-duty, safety-instrumented alternative by selecting the [KROHNE OPTIFLUX 4400 SIL 2/3 Flowmeter] to guarantee strict containment and functional loop safety.
Grounding-Ring-Free Deployment: Capitalize on KROHNE’s patented reference electrode. This unique design evaluates potential differences directly against the fluid medium, completely eliminating the need for expensive physical grounding rings or straps. This saves weight, reduces procurement costs, and eliminates a major leakage risk from your flange seals.
Flange Torque and Gasket Balance: While the 0D/0D engineering removes upstream straight run requirements, field technicians must ensure that flange gaskets are centered perfectly during installation. A gasket edge protruding into the rectangular sensor entrance creates unwanted vortex currents that can distort the microvolt electrode readings.
Orientation Security: Install the sensor at a low point in your piping manifold or on a vertical line with an upward flow path. Avoid mounting the device at the high point of a piping loop, as entrained air bubbles accumulating inside the rectangular tube can trigger dry-pipe or low-conductivity diagnostic alerts.
Because the full-bore rectangular tube features absolutely zero impellers, paddles, or internal obstructions, the WATERFLUX 3300 is entirely maintenance-free, exhibits no mechanical wear, and generates zero pressure loss.
To satisfy annual regulatory water authority audits or fiscal grid balance reports, field technicians do not need to pull the meter from the active line or shut down delivery pumps. Simply interface the handheld OPTICHECK service tool with the transmitter module. The diagnostic system performs an in-situ electronic health validation, checking core magnetic coil resistance, electrode baseline health, and amplifier circuit drift against original factory fingerprints. It generates an audit-ready compliance PDF instantly, keeping your network active and your revenue loop verified. For lower-budget auxiliary bypass loops, drain lines, or localized chemical dosing stations requiring purely mechanical, non-electrical indication, configuring the line with a traditional Endress+Hauser Proline Promag E 100 Magmeter or a rugged local mechanical indicator provides an engineered, cost-effective utility balancing layout.
Q: Why is the rectangular sensor geometry critical for high-end custody transfer water applications?
A: Conventional circular tubes allow fluid to swirl and form asymmetric velocity profiles near piping disturbances. The unique rectangular reduced cross-section of the WATERFLUX 3300 mechanically conditions and linearizes fluid velocity vectors natively across the electrodes. This enables an ultra-stable 1000:1 turndown ratio, tracking minimal night-time drop flows with an elite billing accuracy of ±0.2% to prevent unaccounted water loss.
Q: Can the WATERFLUX 3300 handle installations next to pipe elbows and valves without losing accuracy?
A: Yes. Because the internal rectangular constriction suppresses fluid swirling natively, the sensor is completely independent of upstream hydraulic interferences. This enables a true 0D upstream and 0D downstream straight run installation footprint, allowing it to be bolted directly behind space-constricting slide valves or reducers without calibration drift.
Q: How does the patented reference electrode contribute to installation cost savings?
A: KROHNE’s patented reference electrode evaluates potential differences directly against the fluid medium, grounding the measurement loop electronically. This completely eliminates the need for physical grounding rings or grounding straps. It simplifies field weight, reduces procurement costs, and eliminates a major leakage risk from your flange seals.
Q: What diagnostics are provided under the NAMUR NE 107 compliance profile?
A: Driven by high-frequency magnetic coil excitation, the transmitter provides intelligent predictive monitoring. In full compliance with NAMUR NE 107, it actively flags process abnormalities such as severe electrode coating build-up, fluid conductivity drops, ambient thermal spikes, and air entrainment before severe meter failures or data loss manifest.
Q: Is the WATERFLUX 3300 suitable for hazardous chemical dosing safety loops?
A: No. The WATERFLUX 3300 is structurally customized for advanced clean municipal water utilities and custody transfer. If your plant scheme manages highly corrosive hazardous chemical injection loops or functional safety emergency shutdown circuits (ESD) requiring native compliance, you must select the safety-instrumented [KROHNE OPTIFLUX 4400 SIL 2/3 Flowmeter] to guarantee strict containment and loop integrity.
