Cryogenics

Litre Meter specialise in the design, manufacture and supply of flowmeters. The Hoffer turbine has been extensively utilised over the last 5 decades for cryogenic flow metering. Our range has been enhanced by the Sierra vortex meter. Both are designed for flow metering of LIN/ LOX/ LAR (Liquid Nitrogen, Liquid Oxygen, Liquid Argon) down to -328°F (-200°C). Listed below are all the flow meters within our range that are suitable for cryogenics:

Capable of measuring the flow of gasses and liquids, our flow meters provide accuracy and efficiency. As all materials differ in characteristics, certain flow meters are best suited to certain materials. Below, you’ll find the best products for cryogenic flow metering.

The following flow meters are designed for measuring liquid nitrogen, liquid oxygen, and liquid argon down to -328°F (-200°C):

Vortex Shedding

By using the behaviour of fluid oscillations, vortex and other types of oscillatory flow meters can determine a fluid’s velocity and rate. 

It does this by utilising the fluid’s own properties – its pressure, density, and viscosity, for example – to induce fluctuations in it. These fluctuations create vortices that the flow meter detects to make its measurements.

With no moving parts and its high tolerance to particulate flow, vortex flow meters are commonly used for applications that deal with temperatures that are cryogenically low or where other, more traditional flow meter technologies are out of spec. 

Turbine

Turbine flow meters are velocity measuring devices, and they measure the average velocity of a fluid as it flows through by using a vaned rotor. 

This vaned rotor is found within the flow meter and it is forced to rotate as the fluid flows through the meter body. Turbine flow meters provide an element of flow conditioning, and as a result, accurate readings.

Hoffer turbines are the leading cryogenic turbine manufacturer for the last 50 years.


Vortex Vortex and other types of "oscillatory" flow meters utilize the behaviour fluid oscillations in order to derive flow rate. This technology works by inducing fluctuations in the fluid properties such as pressure, density or viscosity which can be converted into a flow rate. These flowmeters are normally calibrated on water. No moving parts and relatively tolerant to particulate flow these find many applications where temperatures are high or where other more traditional flowmeter technologies are out of spec. +/- 1.5% rate, 1/2" to 8" and insertion. -200°C minimum.
Turbine Inline ‘axial’ turbine flowmeters are velocity measuring devices - they measure the average velocity of a fluid flowing through the body of the meter. Mounted within the body of a gas turbine flowmeter is a vaned rotor. The rotor is centred on a shaft and allowed to rotate on bearings. The shaft is supported in the housing by tube bundles that also provide a measure of flow conditioning for the fluid stream. Designed for cryogenic flow metering. Wide size range and excellent accuracy. 0.24-17 up to 3028-56775 litres/min. Overrange 150% intermittent. ±0.25% reading - typical. ±0.1% repeatability.