Pressure transducers are often devices that transform pressure into an analogous electrical signal. The transformation of pressure into electrical motions gets accomplished by individual distortion of draining pipes connected to the diaphragm with a liquid pressure sensor of the pressure transducer and reinforced into a Wheatstone bridge alignment. The pressure exerted on the sensor produces a change in the membrane, therefore, introducing drainage of the pipes resulting in the production of electrical resistance equal to the pressure exerted.
Pressure transducers have a unique design technique that allows it to function in hazardous locations with high pressure to produce electrical waves. The pressure transducer together with a submersible level transducer enables it to measure liquid levels in any pressure tank connected to the diaphragm. It also allows continuous pressure recording from the bottom or where the diaphragm is.
The transducer also has an electric pressure meter, which shows some electrical signals it generates. It, also, show a proportional of the pressure emitted to the diaphragm.
Hazardous location pressure switches are free from explosion or shocks, correctively covered and tested and legalized to function in hazardous areas globally in places with high bursting rates and of corrosive compounds.
Pressure transducers also get designed in a way that enables it to fit into a particular harmful condition or environment. As such, the transducers may be for a particular working condition or a general purpose pressure transducer with productive functioning.
Types of Pressure Transducers Used In Hazardous Environments
Hazardous location pressure transducer can categorize majorly into different kinds but on my side am categorizing them as per the electrical output when they are best in action and as per the purposes designed to partake.
Types as per the Electrical Output
1. Millivolt output pressure transducers
These are the best economically as it produces about 30mV directly proportional to the hazardous pressure transducer input power or measures the liquid in the tank. That is, in case of any fluctuations, the readings on the electric pressure meter changes.
2. Voltage Output pressure transducers
This hazardous located pressure transducer produces much higher electrical signals compared to millivolt transducer. It involves the necessary signal rationing occasionally 0.5Vdc to 0.10Vdc and is usually not directly proportional to the mode of vibration on the diaphragm.
3. 4-20mA output pressure transducers
These pressure transducers made for hazardous environments produce electrical waves on transmissions made over long distances. It’s because pressure transducers neither get affected by electrical noise nor resistance in the signal cables in these hazardous surroundings.
Types as per Functionality
1. PC Board Mountable pressure transducers
These are the PC boards transducers mounted and compatible with other products on the board. They are flexible and economically pressure transducers.
2. General purpose pressure transducers
General purpose pressure transducers, commonly used by many industries, function in many hazardous locations as per the design made to take part. General purpose can be used to tap electrical signals from any hazardous material hence considered to work with any application.
3. Industrial pressure transducers pressure transducers
With well-insulated body and featuring a scaled 4-20mA output, the industrial pressure transducer generates electrical waves from massive, hazardous industrial environments hence enhancing the reduction of electrical noise in industries.
4. High accuracy pressure transducers
Many pressure transducers in hazardous locations have a margin error of 0.25%. But with the highly stable pressure transducers, the error is much reduced to about 0.05%. The high accuracy pressure transducers can measure high electrical waves generated.
5. Flush Diaphragm pressure transducers
These pressure transducers in dangerous places designed with a diaphragm that is plentiful in nature. It eradicates a hole in the diaphragm that could accumulate the gas or liquid as it functions. These pressure transducers also enable the submersible level transducer to measure liquids with very high viscosity.
6. Special purpose pressure transducers
These pressure transducers have specialized properties designed for different measurements. These may include barometer pressure transducers and submersible pressure transducers. Having an advanced mode of communication technology that enables it to function well.
What Happens when Pressure Transducers Malfunctions?
When pressure transducers in hazardous areas stop functioning, there first exists
• No power generation from these gadgets
• The liquid under pressure in this tanks gets out free hence wastage
• The transducer itself gets heated up and as a result, may explode
• Electronic pressure meter and the liquid pressure sensor both malfunctioning
To try and mitigate such occurrence, I would suggest that immediate replacement undertaken, and the transducer is selected favoring the ambient conditions that it takes place; for example, high-temperature rates, corrosiveness, toxicity, and explosiveness.
Types of hazardous material the pressure transducer can function
Pressure transducers function well in the production of electricity in hazardous material that may cause damage to other gadgets that transform electric signals. These hazardous materials may include:
• Explosive materials; picric acid, dynamite, nitro-glycerine
• High-temperature areas such as geysers and steam companies
• In corrosive materials; hydrochloric acid, chromic acid, ammonium hydroxide
• Very toxic chemicals; mercury, arsenic, ricin
These materials become hazardous due to:
1. Harmful chemicals that are in gaseous or liquid state and are very flammable
2. Machines producing very high degree of temperatures
3. Corrosive materials that are very destructive in nature or caused by the reactions in the systems
What is the indicator that the pressure transducer has been overpressure?
A pressure transducer can be indicated as over pressured when a change in the zero reading of the electronic pressure meter that is to an increasing way reads over 5-6 ma or to up to a maximum of 24ma. These hence show that the pressure indicator may get damaged and alterations need to be made to reduce the effects of malfunctioning of the pressure transducer.
In conclusion, the pressure transducer used in hazardous locations has a unique design that enables it to reduce electrical noise while generating electrical signals. As such, my recommendation is that, as many industries produce lots of hazardous material, use of these pressure transducers is essential to reduce wastage and continuous electrical noise generated. Henceforth it’s nice to have a pressure transducer that best resists the effect of the hazardous materials available in that location.