Honeywell 946-A4V-2D-2C0-175E – Clamp-On Ultrasonic Flow Transmitter | SmartLine Process Solutions
Engineering Background
The Honeywell 946-A4V-2D-2C0-175E is a precision-grade clamp-on ultrasonic flow transmitter engineered for non-invasive liquid flow measurement in demanding industrial process environments. Built on Honeywell’s proven transit-time ultrasonic technology, this transmitter delivers accurate, repeatable flow data without process interruption or pipe penetration — a critical advantage for retrofit installations, hygienic processes, and corrosive media applications.
Product Positioning
Designed for procurement engineers and system integrators who require a certified, drop-in flow measurement solution compatible with standard 4–20 mA control loops and HART communication infrastructure. The 946-A4V-2D-2C0-175E is the preferred choice for chemical processing, water & wastewater, HVAC energy metering, and pharmaceutical utility systems where process isolation is mandatory.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 946-A4V-2D-2C0-175E |
| Manufacturer | Honeywell Process Solutions |
| Measurement Principle | Transit-Time Ultrasonic (Clamp-On) |
| Installation Type | Non-invasive, external clamp-on transducers |
| Pipe Size Range | DN15 – DN6000 (0.5″ – 236″) |
| Pipe Material Compatibility | Steel, Stainless Steel, PVC, CPVC, Cast Iron, Ductile Iron, Copper, PE |
| Fluid Compatibility | Clean liquids, slightly contaminated liquids (particle content <10 g/L) |
| Flow Velocity Range | ±0.01 – 40 m/s (±0.033 – 131 ft/s) |
| Accuracy | ±1% of reading (typical) |
| Repeatability | ±0.2% of reading |
| Analog Output | 4–20 mA (active/passive selectable), 750 Ω max load |
| Digital Communication | HART 7.0 protocol |
| Pulse/Frequency Output | 0–10 kHz, open collector |
| Power Supply | 85–265 VAC / 12–36 VDC |
| Operating Temperature | -40°C to +60°C (-40°F to +140°F) — transmitter electronics |
| Fluid Temperature Range | -40°C to +175°C (-40°F to +347°F) |
| Protection Rating | IP67 (NEMA 4X) |
| Display | 2-line LCD with backlight, flow rate + totalizer |
| Data Logger | Internal memory, 2000 data records |
| Enclosure Material | Aluminum alloy, powder-coated |
| Weight | Approx. 200 g (transmitter unit) |
| Certifications | CE, RoHS, ATEX (zone classification per variant) |
| Warranty | 12 months from date of shipment |
Proven Application Environments
- Chemical & Petrochemical: Non-invasive measurement of acids, solvents, and corrosive liquids where wetted parts are unacceptable
- Water & Wastewater Treatment: Municipal water distribution, effluent monitoring, pump station flow balancing
- HVAC & Energy Management: Chilled water and hot water loop metering for BTU/energy calculation
- Pharmaceutical & Food & Beverage: Hygienic utility water, CIP/SIP circuits, WFI monitoring
- Power Generation: Cooling water flow monitoring, condensate return measurement
- Oil & Gas Upstream/Midstream: Produced water, injection water, pipeline leak detection
Engineering Advantages
- Zero Process Downtime Installation: Clamp-on transducers mount externally — no pipe cutting, no process shutdown, no pressure rating compromise
- Bi-directional Measurement: Simultaneous forward and reverse flow detection with net totalizer
- Wide Fluid Temperature Range: High-temperature transducer option rated to +175°C covers steam condensate and hot process lines
- HART 7.0 Integration: Full device description (DD) available for DCS/SCADA integration via AMS, PACTware, or FieldCare
- Self-Diagnostics: Signal quality indicator (SQI), empty pipe detection, and alarm relay output for predictive maintenance
- Multi-Channel Capability: Supports 2-channel (2-path) configuration for improved accuracy in disturbed flow profiles
System Architecture & Signal Flow
The 946-A4V-2D-2C0-175E operates on the transit-time differential principle: two ultrasonic transducers are clamped diagonally on the pipe exterior. The transmitter alternately fires ultrasonic pulses upstream and downstream through the pipe wall and liquid. The difference in transit time (Δt) between upstream and downstream propagation is directly proportional to the average flow velocity. The transmitter’s DSP core converts Δt to volumetric flow rate, compensates for pipe geometry and fluid acoustic velocity, and outputs a calibrated 4–20 mA signal and HART digital frame simultaneously.
Signal Path: Transducer Pair → Pipe Wall Coupling → Liquid Column → DSP Processing → 4–20 mA / HART Output → DCS / PLC / Flow Computer
Sourcing & Quality Verification
- All units sourced directly from Honeywell authorized distribution channels or certified secondary market with full traceability documentation
- Each unit undergoes incoming inspection: visual, label verification (date code, country of origin), and functional power-on test
- Factory calibration certificate (CoC) available upon request
- Counterfeit risk mitigation: serial number verification against Honeywell product registry available for critical applications
- Export compliance: EAR99 / ECCN classification confirmed; no license required for most destinations
Procurement Process
- Confirm Compatibility: Provide pipe OD, pipe material, fluid type, and operating temperature — our engineers will verify transducer selection
- Request Quote: Contact support@konmask.com for volume pricing, lead time, and freight options
- Order Placement: Purchase via this listing or issue a PO to Konmask.com; Net 30 available for qualified accounts
- Shipping: DHL Express / FedEx International Priority standard; sea freight available for bulk orders
- Documentation Package: Datasheet, wiring diagram, calibration certificate, and packing list included with every shipment
Technical FAQ
Q: Can the 946-A4V-2D-2C0-175E measure flow in plastic pipes?
A: Yes. It is compatible with PVC, CPVC, PE, and PP pipes provided the pipe wall is homogeneous and free of air voids. Acoustic coupling gel is required.
Q: What is the minimum straight pipe run required?
A: Recommended 10× pipe diameter upstream and 5× downstream from any elbow, valve, or pump. Shorter runs are possible with 2-path configuration.
Q: Is HART configuration software included?
A: The device is HART 7.0 compliant. Configuration via any HART communicator (e.g., Emerson 475) or HART-enabled DCS I/O card. DD file available from Honeywell’s device library.
Q: What is the warranty and RMA process?
A: 12-month warranty from shipment date. Contact support@konmask.com with serial number and fault description to initiate RMA. Advance replacement available for critical applications.
Q: Can I get a calibration certificate?
A: Yes. Factory CoC is available upon request at no additional charge. Third-party NIST-traceable calibration can be arranged for an additional fee.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
