pFlow D2 Coolant Monitor for Data Center Cooling

Overview

The pFlow D2 is a compact clamp-on ultrasonic coolant monitor purpose-built for data center liquid cooling infrastructure, where confined rack and manifold spaces leave no room for bulky metering hardware. Covering pipe sizes DN15 through DN32 with an accuracy of ±2% of reading, the pFlow D2 detects flow non-invasively across deionized water, ethylene glycol-water and propylene glycol-water mixtures, oil-based coolants, and fluorocarbon fluids — the full spectrum of media used in modern direct liquid cooling loops.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the pFlow D2 across the Sultanate of Oman and the wider GCC, complete with manufacturer warranty, calibration documentation, and local engineering support. Our instrumentation division maintains regional stock in Muscat and supports the growing base of data center and high-density compute facilities being developed throughout Oman, including projects in the Sohar and Salalah economic zones.

Measurement Principle of the pFlow D2

The pFlow D2 operates on the ultrasonic clamp-on principle, detecting flow through the pipe wall without cutting the line or contacting the coolant directly. A matched transducer pair mounted in the compact pipe clamp sends acoustic signals through the flowing medium, and the instrument resolves the resulting signal characteristics into velocity and volumetric flow readings displayed on its integrated 1.54-inch colour screen.

Because the sensor never contacts the liquid, the pFlow D2 eliminates any risk of leakage at a process penetration — a critical requirement in server halls where coolant contact with electronics is catastrophic. The non-intrusive design also means zero pressure drop across the measurement point, preserving the pump head budget in tightly engineered liquid cooling loops, and no moving parts to wear or service over the equipment’s operating life.

Engineering Design of the pFlow D2

The pFlow D2 integrates transmitter and transducer into a single compact, lightweight housing built from PC engineering plastic, secured to the pipe by a matching pipe clamp of the same material. A four-step installation procedure — clean the pipe, snap on the clamp, tighten the four diagonal screws, then configure pipe parameters through the menu — gets the instrument measuring accurately in minutes, with adhesive pads available for looser-fitting installations. The 1.54-inch colour LCD at 240×240 resolution and three-key touch interface keep the footprint minimal, a deliberate design choice for the tightly packed manifolds typical of rack-level cooling distribution.

Electrical connection uses a Ø5 mm black six-core cable fitted with an M12 A-code connector at a standard 2-metre length, colour-coded for power, RS-485, and 4–20 mA output. The 10–36 VDC power input allows the pFlow D2 to share supply with existing rack-level DC infrastructure, and the IP65-rated housing tolerates the occasional condensation and dust exposure found in mechanical support spaces adjacent to server halls.

Key Features

The following capabilities define the pFlow D2 and explain its selection for data center and small-pipe liquid cooling applications:

• Ultra-compact clamp-on design fits the confined manifold and rack-level spaces typical of data center liquid cooling distribution, where larger meters simply do not fit.
• Compatible with deionized water, ethylene glycol-water and propylene glycol-water mixtures, oil-based coolants, and fluorocarbon fluids covers the full range of media used across direct liquid cooling technologies.
• Four-step clamp-on installation with no pipe cutting minimizes downtime during retrofit of live cooling loops in operational server halls.
• Combined 4–20 mA isolated analog output and RS-485 Modbus communication give integrators flexibility across legacy building systems and modern DCIM platforms.
• Accuracy of ±2% of reading with 0.4% repeatability delivers dependable flow trending for thermal management and capacity planning decisions.
• IP65-rated PC engineering plastic housing withstands the humidity and dust conditions typical of mechanical support spaces adjacent to compute infrastructure.
• Pipe size coverage from DN15 to DN32 addresses the smaller branch and manifold piping common in rack-level and row-level cooling distribution.
• Wide 10–36 VDC power input shares supply with existing rack or row-level DC infrastructure, avoiding dedicated transformers.

Industrial Applications

The pFlow D2 is deployed primarily in data center direct liquid cooling systems, monitoring coolant flow across immersion cooling, direct-to-chip, and cold-plate architectures where compact instrumentation is a hard requirement rather than a preference. Beyond data centers, the instrument serves pharmaceutical production water monitoring, general water and wastewater management, and HVAC applications across Oman’s commercial and industrial base, including chemical, pharmaceutical, and food and beverage process lines where small-diameter piping and demanding media compatibility are common constraints.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the pFlow D2 to data center operators, colocation providers, and industrial clients throughout Oman and the GCC, including facilities in the Sohar and Salalah economic zones supporting the region’s expanding compute and manufacturing capacity. Our engineering team supports pipe-size verification, coolant compatibility review, and commissioning for both new liquid cooling deployments and retrofit projects.

Technical Specifications

The complete technical specification of the pFlow D2 coolant monitor is detailed below:

Call To Action

To request a formal quotation for the pFlow D2, confirm current regional warehouse stock, or obtain the complete technical datasheet, contact the Seven Star LLC instrumentation division. As the authorized partner for pFlow Gentos in Oman and the GCC, we supply genuine factory-calibrated instruments with full manufacturer warranty, and our application engineers are available to advise on coolant compatibility, pipe-size selection, and integration with your data center DCIM or building monitoring platform. Submit an RFQ today and our team will respond with pricing, lead time, and a recommended configuration for your application.