Liquid and Gas NH3 Ammonia Flow Meters

liquid ammonia flow meter

Liquid and Gas ammonia (NH3) is an important industrial raw material. Ammonia flow meters are specially designed to measure the flow of industrial ammonia pipelines. Output pulse signal, 4-20mA, RS485, etc. Help us effectively monitor the flow of liquid or gaseous ammonia!

Gas Ammonia properties and industrial applications

Ammonia is a commonly used gas widely used in refrigeration, fertilizer and other fields. It will decompose into nitrogen and hydrogen at high temperatures and has a reducing effect. It can be oxidized to nitric oxide in the presence of a catalyst. Used to produce liquid nitrogen, ammonia, nitric acid, ammonium salts and amines, etc.

  1. In the electronics industry, high-purity ammonia is used for mold integrated circuit decompression or plasma CVD. To grow silica membrane as boiler feed water pH adjuster. Ammonia is used to neutralize the carbonic acid in the feed water and raise the pH. Slow down the corrosion of carbon dioxide in large water.
  2. Used as alkaline agent, yeast nutrient, food coloring diluent, frozen tofu manufacturing agent and solvent in the food industry. It can also be used in the processing of cocoa powder and sugary cocoa powder, cocoa bean powder, cocoa liquor and cocoa cake, and edible caseinate. The dosage is in accordance with GMP.
  3. Used in chemical industry, scientific research and other fields as standard gas, preparation of standard mixed gas, physical property measurement, nitriding of silicon or silicon oxide, etc. In the inorganic chemical industry, it is used in the manufacture of ammonium salts, nitric acid, hydrogen cyanide, hydrazine, hydroxylamine, thiamine, nitramine, phosphorus amine, urea, etc.
  4. Used to make ammonia and liquid ammonia. Ammonia has a wide range of uses. For example, the presence of HCl and other gases can be tested and reacted with aluminum salt solution to produce aluminum hydroxide. Liquid ammonia can be used to produce nitric acid, urea and other chemical fertilizers. It can also be used as a raw material for medicine and pesticides. In the defense industry, it is used to make propellants for rockets and missiles.
Liquid ammonia storage tank

During the transportation and storage process of ammonia gas, its flow needs to be monitored and controlled in real time.

Ammonia has certain toxicity and corrosiveness, so the following factors need to be considered when selecting an ammonia flow meter:

  1. Flow range: It is necessary to select an appropriate flow meter based on the actual flow range. A flow meter that is too large or too small will affect the accuracy of the measurement.
  2. Accuracy requirements: Different application scenarios have different accuracy requirements for flow meters. Generally, high-precision applications such as refrigeration systems require the use of flow meters with higher accuracy.
  3. Measuring medium: Since ammonia is corrosive, it is necessary to choose a flowmeter made of corrosion-resistant materials.
  4. Environmental requirements: The environment for ammonia gas transportation and storage is generally harsh, and the flow meter needs to be able to withstand extreme conditions such as high temperature and high pressure.
  5. Temperature compensation: The density and viscosity of ammonia change with temperature, so the temperature needs to be compensated to ensure the accuracy of the measurement results.
  6. Pressure compensation: The density and viscosity of ammonia also change with changes in pressure, so the pressure needs to be compensated to ensure the accuracy of the measurement results.

We at Sino-Inst supply various types of ammonia flow meters below.

Featured Gas Ammonia Flow Meters

Properties and Industrial Applications of Liquid Ammonia

Liquid ammonia refers to the aqueous solution of ammonia. The main component is NH3·H2O. It is colorless and transparent and has a pungent odor. Ammonia is easily volatile, has some alkaline properties, and is produced by passing ammonia gas into water.


  • Liquid ammonia has a pungent smell and is alkaline.
  • Liquid ammonia is highly volatile and can quickly evaporate into a gaseous state.
  • The reaction of liquid ammonia with water generates heat and requires careful handling.
  • Liquid ammonia is soluble in many organic solvents, such as alcohols and ethers.


  • Liquid ammonia is widely used in refrigeration and freezing equipment, such as refrigerators, cold storages and refrigeration ships.
  • As an industrial gas, liquid ammonia is often used to produce compounds such as ammonia, nitric acid and urea.
  • Liquid ammonia is also used in metal surface treatment, rubber industry and herbal medicine preparation.
Liquid ammonia mass flow meter

Preparation method:

There are generally two ways to prepare liquid ammonia, namely compression refrigeration and absorption refrigeration:
Compression refrigeration method: compress ammonia gas and then condense it to obtain liquid ammonia.
Absorption refrigeration method: Utilizes the solubility of ammonia in aqueous solution to obtain liquid ammonia through condensation and evaporation.

Industrial ammonia is an aqueous solution containing 25% to 28% ammonia. Liquid ammonia is the main chemical raw material in the chemical production process. Accurate monitoring and measurement of liquid ammonia flow is important for strengthening the economic core of the enterprise.
It is of great significance to calculate, save energy and reduce costs.

Ammonia is a corrosive liquid, so its adaptability to materials needs to be considered when selecting a flow meter. In addition, the temperature, pressure, viscosity and other characteristics of ammonia should also be analyzed. To ensure that the selected flow meter can accurately measure the flow rate of ammonia water and operate stably for a long time.

Sino-Inst manufactures and supplies a wide range of liquid ammonia flow meters.

Featured Liquid ammonia flow meters

More Flow Meaurement Solutions

Due to its wide range of uses, ammonia has become one of the most produced inorganic compounds in the world, and about 70% of it is used to make chemical fertilizers.

When selecting an ammonia flow meter, factors such as flow range, fluid characteristics, pipeline conditions, instrument accuracy, environmental factors, instrument material, signal output, maintenance and calibration need to be comprehensively considered.

If you need to purchase an ammonia flow meter or have related technical questions, please feel free to contact our Sino-Inst engineers!

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