Seeking advice from experts: Temperature and pressure compensation for flow meters
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May I ask the experts: Is temperature and pressure compensation not required when using a flow meter for measurement?
The density of liquids changes very little with temperature and pressure; therefore, temperature and pressure compensation is generally not performed in liquid measurements； The density of a gas changes with temperature and pressure, so temperature and pressure compensation is necessary.
You need to clearly specify what type of flow meter it is; for example, electromagnetic flow meters do not require temperature or pressure compensation, while those of the differential pressure type do need such compensation.
Generally, steam flowmeters and differential pressure type flowmeters require temperature and pressure compensation.
It is the type of flow meter and whether the medium is gas or liquid that determine whether temperature and pressure compensation is needed.
It is generally not necessary; however, temperature and pressure compensation is required when accurate measurement of the gas is needed
Before the ammonia/air mixer, the ammonia flow rate is measured using a mass flow meter, while the air flow rate is measured using an Anemometer
It is generally required only when using a volume flow meter to measure mass flow rate; the mass flow meter has built-in temperature and pressure compensation
It depends on where it is used; it’s necessary if used for measurement, but not required if it’s used for general control indication
Ammonia gas is mixed with air, and the ratio of ammonia to air in the mixture is below 5%