Ultra-low temperatures

D

Ultra-low temperatures

Design D is intended for operation at extremely low temperatures from −255 °C to +150 °C — metering liquid gases (hydrogen, helium, nitrogen, oxygen) in cryogenic plants. The range covers the liquid-hydrogen temperature (−253 °C). Remote design only: the electronics unit is mounted away from the sensor and stays clear of cryogenic temperatures.

DN08 DN25 DN40 DN50 DN80
Technical specifications Request a quote
−255 °C…+150 °C Remote design only Liquid gases: H₂, He, N₂, O₂
Overview

D — Ultra-low temperatures

Design D is engineered for metering liquid gases at ultra-low temperatures — in cryogenic plants: liquefiers, storage, transport and refuelling systems. The medium temperature range from −255 °C to +150 °C covers the operating conditions of liquid hydrogen (−253 °C) as well as liquid nitrogen, oxygen and helium. The sensor is supplied in remote design only: the transmitter is mounted away from the sensor and kept out of the cryogenic zone. The sensor dimensions, with some exceptions, match design L.

D Remote design only 3 m Standard cable length
−255…+150
°C medium temperature range
Remote
Design
DN08–DN80
Available sizes
H₂ / He / N₂ / O₂
Liquid gases

Key features

Ultra-low temperatures — from −255 °C to +150 °C; the range covers liquid-hydrogen temperature (−253 °C)
Remote design only — the electronics unit stays outside the cryogenic zone, protected from ultra-low temperatures
Standard 3 m cable — the transmitter is mounted away from the sensor, the standard solution for cryogenic installations
Liquid gases — hydrogen, helium, nitrogen, oxygen in cryogenic plants
Dimensions per design L — DN08–DN80 size range, proven cryogenic construction
Liquid accuracy classes — from ±0.5 % — Mass-EXPERT metrological range, State Register No. 98506-26

Recommended applications

Liquid hydrogen (LH₂) Liquid helium (LHe) Liquid nitrogen (LN₂) Liquid oxygen (LO₂) Oil & gas industry Chemical industry Power & utilities Cryogenic storage and transport Cryogenic refuelling
Technical specifications

D size table

Key parameters of design D for various sizes

Size Design Medium temperature range Recommended media
DN08..D Remote −255 °C…+150 °C Hydrogen, helium, nitrogen, oxygen
DN25..D Remote −255 °C…+150 °C Hydrogen, helium, nitrogen, oxygen
DN40..D Remote −255 °C…+150 °C Hydrogen, helium, nitrogen, oxygen
DN50..D Remote −255 °C…+150 °C Hydrogen, helium, nitrogen, oxygen
DN80..D Remote −255 °C…+150 °C Hydrogen, helium, nitrogen, oxygen

* The medium temperature ranges given are at the flow meter inlet. Specific parameters depend on the design, seal material and connection type. Please confirm at the time of order depending on the operating conditions and the cryogenic medium type.

The sensor dimensions, with some exceptions, match design L models.

Applications

Where it is used

Hydrogen energy
Cryogenic technologies
LNG
LNG refueling (cryo stations)
Oil & gas
Chemicals

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