Mass flow, density, and temperature — measured simultaneously in a single instrument. The precision that high-density data center cooling demands.
Explore the Solution ↓In two-phase immersion cooling, servers are submerged in a low-boiling-point dielectric fluid. As heat is absorbed, the coolant boils and transitions from liquid to vapor — a highly efficient process that achieves PUE as low as 1.01, but one that requires continuous multi-parameter monitoring to maintain optimal performance.
The dielectric coolant continuously shifts between liquid and vapor states. Accurately tracking density changes in real time is essential to understand the coolant's current phase ratio and ensure efficient heat absorption.
Volume-based flow meters fail in two-phase environments because gas entrainment distorts readings. Only mass flow measurement provides a true, density-independent reading of coolant circulation.
Immersion cooling tanks feature dense, space-constrained plumbing. Instruments that require long straight pipe runs upstream and downstream are impractical in these environments.
A Coriolis meter derives mass flow, density, and temperature from the behavior of vibrating measurement tubes — with no moving parts and no dependence on fluid properties.
A driving coil causes the measurement tubes to oscillate at their natural resonant frequency in a controlled sinusoidal pattern.
As dielectric coolant flows through the vibrating tubes, its inertia creates a Coriolis force that twists the tubes — producing a phase shift between inlet and outlet sensors directly proportional to mass flow rate.
The resonant frequency shifts as fluid density changes. When the coolant transitions from liquid to vapor during boiling, the density drops and the frequency change reveals the exact fluid density in real time.
Built-in RTD temperature sensors measure fluid temperature simultaneously, enabling complete thermal state monitoring from a single instrument.
Available in multiple tube geometries — U-shape, straight-tube, and micro-bend — to match the specific flow range, pressure drop, and installation constraints of your immersion cooling system. All models feature 304SS/316SS stainless steel wetted parts fully compatible with fluorocarbon-based dielectric fluids.
Mass flow, volume flow, fluid density, and temperature from one device. A single installation point tracks coolant flow rate and detects liquid-to-vapor transitions by monitoring density shifts.
4 parameters, 1 deviceUnlike volumetric meters, Coriolis meters measure mass directly. When gas bubbles from boiling coolant enter the measurement section, the reading remains valid — critical for loops where vapor fraction fluctuates constantly.
Accuracy: 0.15%Continuous density monitoring at ±0.001 g/cm³ precision detects exactly when the coolant transitions from liquid to vapor, enabling proactive thermal management and preventing dry-out conditions.
±0.001 g/cm³No upstream or downstream straight pipe runs needed. Directly installable in the tight, compact plumbing of immersion cooling tanks without flow conditioning.
0D / 0D pipe runsStandard: -50°C to 200°C. Cryogenic: down to -255°C. Covers all common dielectric immersion cooling fluids including low-boiling-point fluorocarbon coolants (34°C–61°C boiling point).
-255°C to +350°C4-20mA, pulse/frequency, RS485 (Modbus-RTU), and HART outputs enable seamless integration with BMS and DCIM platforms for automated cooling loop control.
RS485 / HART / 4-20mATechnical parameters for the ASMIK FCC300/FCC800 Coriolis mass flow meters applicable to two-phase immersion cooling systems.
| Parameter | Specification |
|---|---|
| Measuring Variables | Mass Flow, Density, Temperature, Volume Flow |
| Flow Accuracy | 0.15% / 0.2% / 0.5% |
| Density Accuracy | ±0.001 g/cm³ or ±0.002 g/cm³ |
| Temperature Accuracy | ±1°C |
| Density Measuring Range | 0.3 ~ 3.000 g/cm³ or 0.5 ~ 2.0 g/cm³ |
| Medium Temperature (Standard) | -50°C ~ 200°C |
| Medium Temperature (High Temp) | Up to 350°C |
| Medium Temperature (Cryogenic) | -200°C ~ -255°C |
| Output Signals | 4-20mA, Pulse/Frequency, RS485 (Modbus-RTU), HART |
| Protection Rating | IP67 |
| Explosion-Proof | Ex db ia IIC T6 Gb |
| Sensor Structure Types | U-shape, Straight-tube, Micro-bend |
| Sensor Material | 304SS / 316SS Stainless Steel |
| Straight Pipe Requirements | None (0D upstream / 0D downstream) |
ASMIK Coriolis meters are deployed across hyperscale data centers, AI/HPC GPU cooling clusters, and edge computing sites — wherever precise two-phase coolant monitoring is required.
Monitor coolant mass flow and phase state across multiple immersion tanks simultaneously. Detect imbalanced cooling distribution before thermal throttling occurs. RS485 Modbus-RTU enables centralized monitoring of dozens of measurement points.
High-power GPU clusters generating 600W+ per chip demand precise coolant dosing. Coriolis density monitoring prevents dry-out at chip surfaces by detecting vapor fraction changes before they become critical.
Space-constrained edge sites benefit from zero straight-pipe requirements and compact form factor. Remote monitoring via RS485/Modbus enables reliable unmanned operation in distributed locations.
Contact ASMIK for technical consultation on Coriolis meter selection and sizing for your two-phase immersion cooling application.