Pressure is one of many process variables. For this variable to be controlled, it needs to be measurable. A pressure sensor facilitates the measurement of pressure. A transmitter, on the other hand, is a process instrument that converts the measured pressure magnitude or variation into a standard electrical signal. Pressure sensors are differentiated based on the reference pressure they are calibrated to. The most commonly used pressure transmitters in the field include: absolute pressure transmitter (measures pressure relative to a perfect vacuum), gauge pressure transmitter (measures pressure above atmospheric pressure), and differential pressure transmitter (measures the difference in pressure between two points).

These transmitters integrate with platforms such as Modbus, HART, PROFIBUS PA, FOUNDATION Fieldbus, and WirelessHART. Their applications span various industries including chemical, food, HVAC (heating, ventilation, and air conditioning), gas sectors, pharmaceuticals, infrastructure, and environmental technologies.

A differential pressure transmitter measures the pressure difference between two pressure points. Therefore, differential pressure transmitters must have separate ports for the two pressures. The transmitter should be capable of measuring both positive and negative values. Differential pressure transmitters enable flow measurement, level measurement, pressure measurement, and density measurement. They find applications in various fields such as oil and gas, pulp and paper, chemical industry, and food industry. They integrate with platforms like Modbus, HART, PROFIBUS PA, FOUNDATION Fieldbus, and WirelessHART.

A level transmitter is a measurement device used for level measurement. Types of level transmitters vary based on their operating principles. These include Float Level Transmitters, Ultrasonic Level Transmitters, Hydrostatic Level Transmitters, Radar Level Transmitters, Capacitive Level Transmitters, and others. They are used in industrial processes, biogas plants, sewage systems, and in fuel or oil storage facilities.

Flow transmitter is a device that measures the flow of substances passing through a piping system, such as gases, liquids, and vapors, in terms of “unit amount per unit time,” either mechanically or electronically. There are different types available depending on the operating conditions: Vortex flow meters, Coriolis flow meters, Mass flow meters, Electromagnetic flow meters.

pH transmitters are analytical instruments designed for continuous monitoring of pH in industrial processes, pharmaceutical production, and water monitoring.

Oxygen measurement ensures oxygen monitoring in all applications where it is critical for process and product quality. Its applications include inerting of liquid storage tanks, reactor feed gases, centrifuge gases, catalyst regeneration, solvent recovery, landfill gas monitoring, waste sludge digester gases, and oxygen purity.

Temperature transmitters convert the electrical information, which is the function of the temperature sensor belonging to the transmitter, obtained from the probe into meaningful automation standard signals. These signals can be transmitted to your system using various communication protocols such as 4…20 mA, HART, PROFIBUS, or FOUNDATION Fieldbus. Sensors typically used include resistance variables like PT100 – PT1000 or voltage variables like thermocouples. The transmitter linearizes the non-linear electrical information received from here with compensations and proportionally displays it within a previously entered scale on the temperature transmitter device. According to process connection types, temperature transmitters include various types such as fitting to existing thermowells, cylindrical or thermowells with tapered thread connections, suitable flanged thermowells, threaded sockets, metal thermowells, and surface-mounted temperature measurement for non-invasive purposes. They are used in various industries including oil and gas, cement, petrochemicals, metal processing, and waste incineration facilities.

Chlorine is primarily used in the chemical industry, especially in organic synthesis for producing plastics, synthetic rubber, paints, and other chemical products or intermediates. It is also used in bleaching agents, disinfectants, and synthetic pharmaceuticals. Wet chlorine is additionally used to produce bleaching powder, bleached pulp and cloth, synthetic hydrochloric acid, chlorides, disinfect drinking water, and manufacture synthetic plastics and insecticides. Large quantities of chlorine are also required for refining rare metals. A chlorine pressure gauge is typically used in dry or wet chlorine measurement services, gas chlorination systems, fire pumps, agricultural sprayers, and chlorine gas cylinders.

Coriolis measurement principles are widely used across a broad spectrum of applications in industries such as pharmaceuticals, chemicals, petrochemicals, and oil and gas. Coriolis flow meters are used for measuring various liquids including cleaning agents, crude oil, vegetable oils, animal fats, silicone oils, vinegar, ketchup, mayonnaise, gases, and liquefied gases.

They also offer entirely new opportunities for mass flow, density, and temperature measurement in process control. By utilizing the measured primary variable, several key characteristic values can be calculated as illustrated below.

Conductivity transmitters are analytical instruments designed to monitor the levels of electrical conductivity within a specific solution for industrial processes, pharmaceutical manufacturing, and water quality monitoring operations. In contrast, resistivity transmitters monitor how strongly a solution resists the flow of electrical current. Conductivity transmitters provide a reliable interface for process and water measurements.

Devices that condition a sample gas taken from a process flow, allowing it to be measured separately from the process using auxiliary equipment, are defined as extractive gas analyzers.

High-pressure viscosity sensors 440 and 443 are used in various applications, including PVT oil research, EOR, core analysis, and supercritical fluid research. The liquid flows through a 1/4-inch high-pressure port for measurement under low flow or static conditions. The Cambridge Viscosity system measures viscosity, temperature, and temperature-compensated viscosity. It provides data via RS-232, RS-485, or 4-20 mA signal.

A turbidimeter is the device used to measure the degree of cloudiness or turbidity in water. These devices are used to measure turbidity in drinking water, wastewater, industrial process waters, and groundwater. Turbidity measurements are important for monitoring water quality.