CryoIMS® Technology
CryoIMS® = IDP-LT® + Pressure Sensor + Temperature Sensors in a single flange
- CryoIMS® :
- Cryogenic Integrated Monitoring System
- IDP-LT® :
- Internal Differential Pressure Level Transmitter
What is CryoIMS®?
CryoIMS® integrates Level, Pressure, and Temperature measurement through a single 2-inch flange connection — eliminating multiple tank penetrations for extreme cryogenic environments.
Level Transmitter
Differential pressure-based level measurement for cryogenic fluids
- METHOD Internal Differential Pressure (IDP)
- FEATURE Minimized influence from fluid property changes
- ADVANTAGE Stable measurement even in boiling and turbulent conditions
Temperature Transmitter
Multi-point thermocouple temperature measurement
- METHOD Thermocouple (TC)
- FEATURE Wide temperature range coverage, routed through main housing pipe
- ADVANTAGE Reliable across the full 4K to 300K range
Pressure Transmitter
Cryogenic-rated pressure transmitter for tank monitoring
- METHOD Cryogenic Pressure Transducer
- FEATURE Fast response characteristics for rapid pressure changes
- ADVANTAGE Early detection of abnormal pressure conditions
IDP-LT® — Core Component
IDP-LT® is the heart of CryoIMS®. Its Internal Differential Pressure method delivers stable level readings even during boiling, turbulence, and phase transition — no external power required.
Body Column
Main structural body with vacuum-insulated outer shell
Conductive Heater
Conducts ambient heat inward to vaporize liquid — not an electrical heater, requires no external power
Vapor Space
Space between heater and vacuum insulation where gas phase forms
DP Sensor
Measures pressure difference between tank top and vapor space for level calculation
Flange
Top-mounted connection that secures the body column to the tank
Operating Principle
Pressure Equilibrium
Open the manifold valve to equalize internal tank pressure with vapor column pressure. Liquid levels in both regions become identical.
Vaporization Begins
Close the valve. The conductive heater vaporizes liquid inside the vapor column using ambient heat conduction — no electrical power required.
Vapor Space Formation
The liquid level inside the column drops as vapor space forms. The tiny volume enables completion within seconds, aided by the copper rod's high thermal conductivity.
Differential Pressure Measurement
The pressure difference between the top and bottom of the column is measured by the DP sensor and converted to a precise liquid level reading.
The small vapor column volume allows vaporization to complete within seconds.
Performance Validation
Liquid Nitrogen (LN₂) Tests
Horizontal cylindrical LN₂ tank — static and dynamic conditions
- IDP-LT performance was validated in a horizontal cylindrical LN₂ tank under both static and dynamic conditions.
- A ruler served as the reference measurement for liquid level.
- Under static conditions, IDP-LT measurements showed good agreement with the ruler measurements.
- Even under continuous ±10° cylinder oscillation, IDP-LT maintained stable measurements.
Liquid Helium (LHe) Tests
Vertical cylindrical liquid helium tank — mass-based reference validation
- IDP-LT performance was validated in a vertical cylindrical liquid helium tank.
- A platform scale served as the reference measurement for the tank mass.
- IDP-LT measurements showed good agreement with the reference mass measurements.
Liquid Hydrogen (LH₂) Tests
Vertical cylindrical LH₂ tank — filling, steady-state, and insulation failure tests
- CryoIMS performance was validated in a vertical cylindrical liquid hydrogen tank.
- The CryoIMS included one IDP-LT, one pressure sensor, and four temperature sensors installed at different heights.
- A platform scale served as the reference measurement for the tank mass.
- Three tests were conducted: an initial filling test, a steady-state test, and an insulation failure test.
- Significant boil-off gas generation occurred during the initial filling and insulation failure tests.
- CryoIMS provided reliable simultaneous measurements of liquid level, pressure, and temperature.
- IDP-LT measurements showed good agreement with the reference mass measurements in all tests.