Level Measurement of Emerson provides accurate, reliable, and efficient measurement solutions for all industrial needs.
With advanced technology, Emerson's level measurement devices not only optimize production processes but also enhance performance and minimize operating costs.
From the most challenging applications involving viscous, corrosive, or harsh environments, to the simplest scenarios.
Continuous Level Measurement
With superior accuracy, intelligent design, and robust performance under all conditions – from extreme environments to corrosive liquids.
These sensors not only enable perfect process control but also elevate safety and efficiency.
Let Emerson Rosemount elevate your measurement technology to a new level! Explore the measurement principles of Emerson sensors below.
Hydrostatic Pressure / Differential Pressure
The hydrostatic pressure measurement principle is based on the correlation between the pressure at a point within a liquid and the height of the liquid column above that point, influenced by the liquid's density and the gravitational acceleration at the measurement location.
This solution is suitable for liquid level measurement applications ranging from basic to complex, where stringent accuracy is not a critical requirement, and offers measurement options for both closed and open tanks, including those in harsh environments such as high temperature, high pressure, and corrosive conditions.
Advantages:
- Integrated on-board display and local configuration, with configuration via Bluetooth.
- Tuned-System design with diaphragm seal isolating the process fluid and sensor, improving response time by nearly 2x.
- Integrated comprehensive device health diagnostics, including Basic Diagnostics, Loop Integrity, Process Intelligence, and Plugged Impulse Line, ensuring reliable measurement.
- Unlimited rangeability, with 0.025% of span accuracy.
- Turndown capability up to 200:1, enhancing reliability and accuracy at low levels up to 200.
Guided Wave Radar
Radar waves (high frequency) are transmitted along a probe or waveguide. When the radar waves encounter the liquid surface, some energy is reflected. The time taken for the return signal is used to calculate the fluid level.
Suitable for continuous level measurement of solids and liquids in narrow or small tanks, confined spaces, or environments with unevenly distributed media (convex or concave) or low dielectric constant.
Advantages:
- Delivers precise measurements unaffected by changes in process conditions, media properties, temperature, density, or even vibrations and surface turbulence.
- Features a dual-compartment housing design, separating the signal connection from the control circuitry to minimize moisture or water accumulation inside, preventing damage.
- Easy installation and configuration via the HART Communication Protocol.
- The guide probe can be easily trimmed to match the actual tank dimensions.
- Designed for challenging applications, including liquids, slurries, solids, multiphase media, and environments requiring high explosion safety standards, such as oil and gas, chemical processing, and more.
Non-Contact FMCW Radar
Utilizing Frequency Modulated Continuous Wave (FMCW) radar technology, radar waves are emitted and reflected to the device upon striking the material surface. Based on the difference between the transmitted frequency and the reflected wave frequency, the device determines the wave travel time and calculates the distance to the material surface.
An optimal and highly accurate solution for continuous level measurement of solids or liquids across a wide range of applications, from basic to highly complex, such as tanks with agitators, corrosive media, buildup, dusty environments, or those with foam.
Advantages:
- Constructed with PVDF or PTFE housing materials and an ingress protection rating of up to IP68, it is suitable for most industrial liquid-level measurement applications, including harsh conditions and highly corrosive environments.
- The measurement range extends up to 30 meters.
- Features Smart Meter Verification, enabling automatic "health" checks of the device under operating conditions while simultaneously generating reports for appropriate maintenance planning.
- Allows for easy calibration and device testing without requiring changes to the liquid level.
Bypass chamber
Một phao từ tính di chuyển theo mức chất lỏng bên trong một ống bypass gắn song song với bể chứa. Phao từ tính liên tục truyền tín hiệu tới cảm biến từ trường bên ngoài hiển thị trực quan giá trị mức điểm.
Giải pháp giám sát mức chất lỏng trực quan tại chỗ cho các bồn nhỏ hẹp, hóa chất ăn mòn, có hoặc không có truyền thông về phòng điều khiển.
Advantages:
- Thiết kế kính thủy không tiếp xúc với môi chất hạn chế tối đa rò rỉ so với đồng hồ kính thủy truyền thống
- The measurement range extends up to 30 meters.
- Có thể tích hợp và kết hợp với cảm biến đo mức Guided Wave Radar (Radar dẫn hướng) để truyền dữ liệu về phòng điều khiển
- Phù hợp cho các ứng dụng đo hiển thị mức hỗn hợp 2 chất lỏng hoặc chất lỏng và chất khí
Point Level Sensors
Emerson point-level sensors are the perfect choice for simple yet effective applications.
Accurately detect when the level of liquids or solids reaches a predetermined threshold, even in corrosive environments or harsh conditions.
Emerson point level sensors operate based on three measurement principles as follows:
Rotating Paddle (Mechanical)
The sensor utilizes a paddle mounted on a motor-driven shaft. When the material (solids such as powders or granules) contacts the paddle, the motor stops or slows down due to resistance from the material. This change triggers a signal indicating a full or empty level.
An ideal solution for point-level detection in high-temperature areas or media prone to local clumping, suitable for high-load or high-humidity materials.
Advantages:
- Robust paddle design capable of withstanding heavy loads and extreme temperatures.
- Unaffected by dust, static electricity, buildup, or clumping.
- Insertion length options range from 70 mm to 4,000 mm.
- Fully sealed motor bearings and shaft, making it ideal for dusty applications.
- Rotatable protective housing facilitates easy installation and optimizes space utilization.
Vibration Fork
Utilizes two fork tines that generate mechanical oscillations at a fixed frequency. When the material (liquid or fine powder) covers the vibrating tines, the oscillation frequency changes, which is detected to signal the level.
Suitable for most liquid applications and even solids in complex conditions, offering high sensitivity. Ideal for environments affected by pipeline vibrations, corrosive or abrasive media, and more.
Advantages:
- Short fork design enables installation in small pipes or tanks with highly restricted space.
- Extendable length options withstand high mechanical loads, such as low-level indication in very large or tall silos.
- Sensitivity can be customized to high or low settings based on the application.
- Multiple sensitivity levels available: 5 g/L, 20 g/L, 50 g/L.
- Housing protection rating up to IP67, providing excellent resistance to dust and moisture.
Vibrating Rod & Capacitance
Vibrating Rod:Utilizes a single rod that generates oscillations at a fixed frequency. When solid material contacts the vibrating rod, the oscillations are dampened, and the device detects this change to send a level signal.
- Suitable for basic solid material measurement applications.
CapacitanceOperates based on the change in capacitance between the sensor and the tank wall. When material (liquid or solid) contacts the probe, the dielectric constant of the system changes, which is detected to signal the level.
- An optimal solution for most production process applications to measure the level of solids with a recommended dielectric constant.
Advantages:
- Sensitivity can be customized to high or low settings based on the application.
- Extendable length options withstand high mechanical loads, such as low-level indication in very large or tall silos.
- Housing protection rating up to IP67, offering excellent resistance to dust and moisture.
- Capable of measuring media with a dielectric constant as low as 1.5.
Applications of Emerson Level Sensors: From Basic to Complex
Emerson level sensors provide flexible solutions for a wide range of needs, from basic to highly complex applications.
They enable easy monitoring of liquid or solid levels in applications such as:
- Level measurement for distillation columns.
- Measuring the level of cooked grains in fermentation silos for cereal production.
- Level monitoring in fly ash silos at coal-fired power plants.
- Level measurement for Clean-in-Place (CIP) solutions in the dairy industry.
- Level monitoring in chemical storage tanks.
- Measuring dust collector tank levels in limestone production.
- Monitoring sugar stock levels for cereal manufacturing.
- Level measurement in buffer tanks and pressure vessels.
- Level monitoring for three-phase separators.
- Measuring levels during evaporation and crystallization processes in sugar refining.
- Level monitoring in milk storage tanks.
- Level measurement in residual oil tanks.
- Level monitoring in reactors and mixing vessels.
- Level measurement for two-phase separators.
Emerson level sensors are designed to deliver precise measurement of liquid and solid levels across applications ranging from the simplest to the most challenging, such as tanks with agitators, corrosive media, buildup, dusty environments, foaming conditions, or unevenly distributed media (convex or concave).
Beyond that, the Rosemount™ series of sensors are easily installed in narrow, small, or space-constrained tanks.
Ensuring smooth customer processes with the exceptional accuracy and reliability of Emerson-level sensors.
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