Rosemount 3105 Level Transmitter
Brand:Rosemount
Delivery:12-16 Weeks
Communication Protocol:4–20 mA/HART
Operating Temperature:-22 to 158 °F (-30 to 70 °C)
Product Introduction
Products Description
Rosemount 3105 level transmitter is a high-performance liquid level measurement device produced by Emerson Corporation. It adopts advanced radar technology to provide accurate and reliable liquid level measurement solutions. Whether in industrial process control systems or in liquid level monitoring applications such as tanks and tanks, it can provide excellent performance and stable measurement results.
Parameter
Model | 3105 |
Signal output | 4–20 mA with HART communication |
Housing material | Polyurethane-covered Aluminum |
Conduit/cable thread | ½ –14 NPT |
Wetted material | PVDF |
Process connection | 2-in. NPT thread |
Product certificates | ATEX Intrinsically Safe |
certification | functional test |

Advantage
26GHz RF radar technology has high measurement accuracy and can achieve liquid level measurement accuracy at the millimeter level, making it suitable for applications with high precision requirements.Accurate liquid level measurement can be carried out in different media (such as liquids, solids, or particles), suitable for various application scenarios.
The energy of the 26GHz RF signal is relatively large, and it can penetrate dense media, gases, and vapors without interference.
26GHz radio frequency radar technology has little impact on external environmental factors such as temperature, pressure, and humidity, and has strong anti-interference ability.
Suitable for liquid level measurement in different industrial fields, including chemical, food and beverage, pharmaceutical, oil and gas industries.
No direct contact with liquid is required, avoiding the pollution and loss issues that may occur in traditional methods.
Working principle
Rosemount 3105 level transmitter utilizes the propagation time and reflection intensity of radar signals to measure liquid levels. Its transmitter emits 26GHz microwave signals to the liquid surface. When the signal encounters the surface of an object, some of the signals are reflected and received by the receiver. By measuring the propagation time of the signal and the intensity of the received reflection signal, the height of the liquid level can be calculated. The transmitter can also automatically compensate for the impact of changes in the dielectric constant of the medium on the measurement results, ensuring measurement accuracy.

Signal transmission: The liquid level transmitter will emit a high-frequency RF pulse signal, usually at a frequency of 26GHz. These signals propagate at a very fast speed and pass through the air to reach the surface of the target object.
Reflection signal: When the RF signal encounters the surface of an object, some of the signal will be absorbed, while the other part of the signal will be reflected by the surface of the object. These reflected signals will be received and analyzed by the liquid level transmitter.
Time difference measurement: The liquid level transmitter measures the time difference between transmitting the signal and receiving the reflected signal, and calculates the distance between the object and the sensor based on the speed and time difference.
Conversion of distance to liquid level: By comparing the measured distance with a known liquid level reference point, distance can be converted to liquid level height, thus achieving liquid level measurement.
Application area
Chemical industry: Used for liquid level control and monitoring in chemical equipment such as storage tanks and tanks.
Oil and natural gas industry: suitable for liquid level measurement of crude oil, petroleum products, natural gas liquids, etc. for storage and transportation.
Food and beverage industry: can be used for liquid level monitoring in liquid storage tanks and processing equipment.
Water treatment industry: suitable for liquid level monitoring and control in environments such as water treatment plants and sewage treatment plants.
Rosemount 3105 level transmitter is highly praised for its advanced radar technology, high-precision measurement performance, stable and reliable operation, and widely applicable application fields. It provides accurate, reliable, and easy to install and operate solutions for industrial process control systems and liquid level monitoring applications.
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