Ammonia Detection Equipment Overview - Q&A

1. Gas characteristics of ammonia

(1) Ammonia, with a pungent odor, is lighter than air, is very soluble in water, and is easy to liquefy. The lower limit of explosion is 15%, and the upper limit is 30.2% molecular formula NH3. Molecular weight 17.03. The explosion limit of vapor-air mixture is 16~25% (the most ignitable concentration is 17%). Ammonia has a solubility of 34% in water at 20°C, 10% solubility in anhydrous ethanol and 16% solubility in methanol at 25°C, and is soluble in chloroform and ether, and it is a good solvent for many elements and compounds. The aqueous solution is alkaline, and the PH value of 0.1N aqueous solution is 11.1. Liquid ammonia will erode certain plastic products, rubber and coatings. In the case of heat and open flame, it is difficult to ignite and the danger is low.   
However, ammonia and air mixtures will burn and explode in open flames when they reach the above concentration range, and the danger is higher if there is oil or other flammable substances. react with sulfuric acid or other strong inorganic acids to release heat, and the mixture can reach boiling.
(2) The aqueous solution of ammonia is called ammonia, which is a soluble weak alkali and has alkali facilitation
(3) Reaction with water
When ammonia is dissolved in water, ammonia molecules and water molecules combine to form ammonia monohydrate (NH) through hydrogen bonds₃•H₂O)

2. Liquid ammonia

Physical and chemical properties: colorless liquid, easy to vaporize, colorless gas in the standard state, with pungent odor. The density of liquid ammonia was 0.617g/cm3, and the boiling point was 33.33°C. Molecular formula: NH3, liquid anhydrous ammonia (liquid ammonia) synthesized by direct catalysis of hydrogen and nitrogen at high temperature and pressure. Liquid ammonia can be used as a deep freezing agent, mainly used to make nitric acid, inorganic and organic chemical products, chemical fertilizers, etc. Liquid ammonia is a highly corrosive toxic substance, boiling at -33.3 °C under standard atmospheric pressure, has a strong corrosive effect on the skin and eyes, and produces severe painful burns Liquid ammonia is a good solvent, due to the polarity of the molecule and the presence of hydrogen bonds, liquid ammonia is very similar to water in many physical properties, the lone electron pairs in the NH3 molecule tend to form coordination bonds with other molecules or ions, and the formation of various forms of ammonia complex Liquid ammonia is a good solvent, due to the polarity of the molecule and the presence of hydrogen bonds, Liquid ammonia is very similar to water in many physical properties

3. In order to prevent the leakage of small content of ammonia and cause safety accidents:

Suggested use:  Aetna Jihua AMMONIA Detection Equipment:
(1) JAHT-FM-NH3 (ammonia detection probe/transmitter) + AT-1/2/4/8 (alarm control host)
(2) JHAT-FS-NH3 (ammonia detection probe/transmitter) + AT-1/2/4/8 (alarm control host), this model transmitter has on-site display.
Used to monitor ammonia preparation workshops, storage rooms and other places.

4. Ammonia probe and host:

The probe model of Jihua is; JHAT-FM-NH3
Measuring range: 0-100ppm; 1-200ppm; 0-1000ppm is available for customers to choose, Measuring range can be set according to customer requirements, alarm point default: low explosion 15ppm (primary alarm), high explosion 30ppm (second level alarm), customers can set alarm points according to different situations, the maximum current is 30MA, can output 4-20MA standard signal, connect the two-core shielded cable, working principle: electrochemical, Operating temperature: -10-60 degrees, accuracy is plus or minus 5%, reaction time is less than 30S.
The host model of Jihua is; AT-1/2/4/8/96
Host: It can receive 4-20MA analog signals, both two and three wires, can provide 24V power supply for the probe, and can choose the host with four channel numbers of 1, 2, 4, and 8; Each channel is connected with a probe, and the number of channels is stated when ordering. Alarm points and parameters can be set by buttons, and each channel has two alarm outputs; Switching passive contact output 220VAC, 2A, can set low limit and high limit alarm, or two upper limit and two lower limit alarms, with delay alarm function (some models); The host can correct the data of the detection probe and remotely adjust the zero point; Optional 485/232 communication function, working voltage 220V AC, and constant monitoring and communication

5. The specific parameters of the equipment are as follows:

(1) Ammonia detection probe/transmitter:                           

Bus system ammonia detection probe/transmitter: