Differential Pressure Sensors Level Transmitters
Description
Differential Pressure Sensors Level Transmitters are devices used to measure the level of fluid within a tank by determining the pressure difference between two points. These sensors provide a means to accurately gauge the amount of liquid present by assessing the pressure exerted by the fluid column.
Working Principle
Differential Pressure (DP) level transmitters operate by measuring the pressure difference between the top and bottom of a tank. The higher pressure at the bottom, caused by the fluid, is compared to a lower reference pressure, typically atmospheric. This pressure differential corresponds to the hydrostatic head or weight of the liquid in the tank, allowing for the calculation of the fluid level. These sensors are particularly useful because they can provide continuous level measurement and are adaptable to various tank configurations, whether open or closed to the atmosphere .
Applications
DP level transmitters are widely used in industries where precise liquid level measurement is critical. For example, in chemical processing plants, they help maintain the correct levels of reactants in reaction vessels. In the water treatment industry, they ensure that tanks are neither overfilled nor underfilled, which is crucial for maintaining process efficiency and safety .
Advantages over other Level Transmitters
One of the key advantages of differential pressure level transmitters is their ability to provide accurate measurements in both open and closed tank systems. Unlike some other types of level sensors, DP transmitters can compensate for changes in atmospheric pressure, which can affect the accuracy of measurements in open tanks. Additionally, they are versatile and can be used with various types of fluids, including those with different densities .
Limitations
A significant limitation of DP level transmitters is their sensitivity to changes in fluid density. If the density of the fluid changes, the transmitter must be recalibrated to maintain accuracy. This can be a drawback in processes where fluid composition varies frequently. Furthermore, these sensors may not be suitable for highly viscous fluids or those that tend to coat or plug the sensor, as this can lead to maintenance challenges .
Considerations
When selecting a differential pressure level transmitter, several factors should be considered. Initial costs can vary depending on the complexity and features of the transmitter. Operating expenses may include regular calibration, especially if fluid density changes are expected. Durability is generally high, but the sensors require protection from harsh environmental conditions to prevent damage. Accuracy is a strong point, but it is contingent on proper calibration and maintenance. Replacement and maintenance costs should also be factored in, particularly in environments where the fluid properties can lead to sensor fouling or damage .
from Viatran
The model 359 tank level transmitter has been designed to dramatically improve CIP/SIP recovery time. Using hydrostatic pressure to determine liquid level, the 359 ensures accurate and reliable measurement in ranges from 33" WC to 750" WC. [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Azbil Corporation
These level gauges with macro processors drastically boost and sustain customer productivity by utilizing amassed past data along with providing excellent repeatability and stability. This transmitter utilizes a combination of angle sensor and microprocessor to deliver high reliability and easy... [See More]
- Meter Technology Type: Differential Pressure Sensors; Mechanical/magnetic Floats
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Features: Submersible
from NOSHOK, Inc.
NOSHOK Series 612 Submersible Level Transmitters were designed to provide a previously unequalled level of performance. Utilizing diffused semiconductor and thin film technologies, Series 612 transducers are accurate, shock resistant and extremely stable over long periods of time. Reverse polarity... [See More]
- Meter Technology Type: Differential Pressure Sensors; Other (Such as tilt etc.)
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage (optional feature); AnalogCurrent (optional feature)
from PMC Engineering LLC
The ATM/NC series is part of a comprehensive range of pressure transmitters specifically designed for level monitoring in chemical tanks. The series 30 provides a conventional 4-20 mA, 2-wire configuration. Features such as Kevlar strengthened Teflon cable and choice of construction materials allows... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The DCX-38 VG is an autonomous instrument for recording water level with a high resolution and full scale ranges as low as 0,5 mWC / 50 mbar. It features a rugged, gold-plated ceramic diaphragm for outstanding long-term stability and stainless steel housing with user serviceable battery for long... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 4.35
from Viatran
The Model 360 tank level transmitter has been designed to dramatically improve CIP/SIP recovery time. Using hydrostatic pressure to determine liquid level, the 360 ensures accurate and reliable measurement in ranges from 30" WC to 900" WC. [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from NOSHOK, Inc.
Designed for severe high solids environments such as sewage, lift stations, storm canals, wet wells and slurry tanks where sludge, slurry or turbulence may be present Ideal for a wide variety of industrial and municipal liquid level measurement applications requiring watertight protection, Welded at... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage (optional feature); AnalogCurrent (optional feature)
from PMC Engineering LLC
The PMC VersaLine ® VL4500 Series submersible transmitters are specifically designed for depth and level measurements of groundwater, wastewater, and sea water. Typical applications are small size bore holes, wells, dams, irrigation, sewage lift stations, rivers and oceanography. The titanium... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from Keller America, Inc.
The DCX-18 ECO is an autonomous, rechargeable battery powered instrument. It features a stainless steel 18 mm in diameter housing designed to record pressure (water depth) and temperature over long periods at a very economical price. Its small size, rechargeable battery, fully welded housing and the... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 160
from NOSHOK, Inc.
The NOSHOK Series 627 level transmitter combines the reliability and long life of diffused semiconductor and sputtered thin film strain gage sensors with safe electronics for outstanding performance and value. These transmitters were designed for applications that require liquid level measurement in... [See More]
- Meter Technology Type: Differential Pressure Sensors; Other (Such as tilt etc.)
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage (optional feature); AnalogCurrent (optional feature)
from PMC Engineering LLC
The PMC VersaLine ® VL4200 Series submersible transmitters feature FM Certification for use in hazardous locations. They are specifically designed for depth and level measurements of groundwater, wastewater, and sea water. The Titanium housing provides immunity to virtually all environments,... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The DCX-22 is an autonomous, battery powered instrument made of stainless steel designed to record water depth (pressure) and temperature over long periods. Two versions are offered: DCX-22. The sensor, electronics and battery are housed in a sealed stainless steel tube, for submersible deployment. [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 160
from PMC Engineering LLC
The PMC VersaLine ® VL5000 Series submersible transmitters are designed for depth and level measurements of ground, surface, waste, and sea water. Suitable for small size bore holes, wells, dams, irrigation, sewage lift stations, rivers and oceanography. The VL5000 has been specifically... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from Keller America, Inc.
This instrument is based on the differential pressure measurement of two absolute sensors. The level sensor is connected by a cable to the electronics housing, which incorporates: the electronics with the latest µP-technology (16 Bit A/D converter), the waterproof mounted absolute pressure sensor... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 33.36
from PMC Engineering LLC
The PMC VersaLine ® VL5xx6 Series is part of a comprehensive range of submersible transmitters for the depth and level measurements of ground, surface, waste, and sea water. Suitable for small size bore holes, wells, dams, irrigation, sewage lift stations, rivers and oceanography. For Zero... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The DCX-25 PVDF is an autonomous, battery powered instrument designed to record water depth (pressure) and temperature over long periods. The housing is made of polyvinylidene fluoride and the sensing diaphragm is available in either Hastelloy C-276 or titanium 6AL-4V. This combination of wetted... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane; Other (Such as tilt etc.)
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 160
from PMC Engineering LLC
PMC has engineered a rugged side entry cable with optional wedge nosecone to facilitate the use of their submersible transmitters inside pipes where the level measurement is required under flowing conditions. This is offered as a standard option for “ ¾ ” inch diameter... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from Keller America, Inc.
The Series 46 X combines the ceramic measuring cell for low pressure ranges with the µP-electronics of the digital Series 30 pressure transmitters. The signal values of the pressure- and temperature sensors are determined by a polynomial compensation. The values can be shown and stored on a PC... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PMC VersaLine VL3000 Series submersible transmitters are specifically designed for depth and level measurements of groundwater, wastewater and sea water. Typical applications would be in rivers, wells, dams, irrigation, sewage lift stations and oceanography. The stainless steel construction will... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors; Electrical Conductivity or Resistance (optional feature)
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
These piezoresistive pressure transmitters are approved for use in high explosive gas and dust atmospheres of groups I (mining industry) and II (industrial applications) where there is a high risk of explosion. Optionally available are Low Voltage Versions (LV) with 3,5 ق 8,5 V. Signal... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PMC VersaLine ® VL1000 Series submersible transmitters with NPT Process Connection for increased applications. Available with either male or female NPT process connections the VL1000 series maintains the VersaLine industry standard, high integrity waterproof design. Featuring fully welded... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Levelgage submersible level transmitter provides outstanding performance in a wide array of applications, from water storage and distribution to wastewater. It offers your choice of analog outputs (current or voltage). The Levelgage is assembled in the U.S to customer specifications, including... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PTM/N series is part of a comprehensive range of pressure transmitters specifically designed for the measurement of depth and level in water, wastewater and tanks. The series 32 provides a conventional 4-20 mA, 2-wire configuration, rangeable to 25% of the specified FS. Features such as Kevlar... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Acculevel SDI high accuracy level transmitter incorporates microprocessor-controlled signal conditioning to provide outstanding accuracy over temperature. Like the original Acculevel, it provides dual outputs but both are digital; one SDI-12 and one RS485. Both allow users to retrieve both level... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The ATM/N 19 is part of a comprehensive range of pressure transmitters specifically designed for the long term monitoring of ground water and waste water. This series 94 is available with the most commonly used voltage outputs including 0 to 5 VDC and 0.5 to 4.5 VDC. Features such as Kevlar... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage
from Keller America, Inc.
The 36 Xi W series is built on the latest-generation microcontroller platform, which KELLER has developed to meet extremely high precision requirements and increase compatibility with a wide variety of interfaces. Along with pressure (level) information, digital interfaces also transmit other water... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PMC VersaLine VL5xx6 Series is part of a comprehensive range of submersible transmitters for the depth and level measurements of ground, surface, waste, and sea water. Suitable for small size bore holes, wells, dams, irrigation, sewage lift stations, rivers and oceanography. The VL5xx6 provides... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Microlevel combines the high accuracy of the Acculevel with a class-leading housing diameter of only 0.63". It incorporates Keller's proven microprocessor-controlled signal conditioning to provide outstanding accuracy over temperature. It provides dual outputs, one 4-20mA analog and one digital... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PTM/N/RS485 series is an outstanding transmitter and part of a range specifically designed for the measurement of depth and level in water, wastewater and tanks. The series 44 offers RS485 (Modbus) protocol together with a 4-20 mA, 2-wire configuration for both level and temperature. It is... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The DCX-16 is an autonomous, battery-powered data collector in stainless steel housing with a very small 16mm diameter. In applications where a small probe diameter is an advantage, the logger can record the water level (pressure) and the temperature over long periods. DCX-16. The sensor,... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 160
from PMC Engineering LLC
The DTM.OCS.S/N Series digital submersible transmitters are polynomial compensated high performing level sensors which achieve total error bands up to 0.03% FS over a temperature range of 25 to 175 °F. The DTM.OCS.S/N is based on the standard RS485 ModBus protocol and can be easily connected to... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 360
from Keller America, Inc.
The LevelRat non-fouling submersible level transmitter is specifically designed for use in environments that would clog a traditional level transmitter. The unique Kynar diaphragm combines increased durability and Teflon-like non-stick properties to provide increased service time without... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The PMC Extended Diaphragm Level Transmitter has been especially developed for measuring level in tank and vat applications. The extended diaphragm allows the sensing diaphragm to be mounted flush with the inside of the tank or vat wall, thereby avoiding the usual pocketing problems encountered by... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Econolevel provides proven Keller quality for high volume pumping and distribution applications. It offers an industry standard 4-20mA analog output and durable 316L Stainless Steel construction. The Econolevel OEM submersible level transmitter is built in the U.S. Minimum order quantities... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from PMC Engineering LLC
PMC Electronic Pressure Transmitters accurately measure pressures, levels, and vacuum ranges in processes where clogging of the diaphragm face is a problem. The small diameter (1 ½") of the transmitter permits installation flush with the inside wall of pipes 3" in diameter or larger. This... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Digilevel employs Keller's proven piezoresistive sensor technology coupled with an SDI-12 serial-digital interface for environmental level monitoring applications. The Digilevel is compatible with all SDI-12 v1.3 commands and capable of operating in several emulate modes for popular SDI-12... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 390
from PMC Engineering LLC
PMC Electronic Pressure Transmitters accurately measure pressures, levels, and vacuum ranges in processes where clogging of the diaphragm face is a problem. The small diameter (1 ½") of the transmitter permits installation flush with the inside wall of pipes 3" in diameter or larger. This... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
Based on our popular Digilevel, the Digilevel EC is made specifically for Environment Canada. The Digilevel EC employs Keller's proven piezoresistive sensor technology coupled with an SDI-12 serial-digital interface for environmental level monitoring applications. The Digilevel EC is compatible with... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane; Other (Such as tilt etc.)
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 42.63
from PMC Engineering LLC
The ATM/N/IS series is part of a comprehensive range of pressure transmitters specifically designed for the long term monitoring of ground water, wastewater and tank level measurement. This series 84 provides a conventional 4-20 mA, 2-wire configuration and is certified for use in hazardous... [See More]
- Meter Technology Type: Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from Keller America, Inc.
The Series 26 W transmitter utilizes the Series 10 piezoresistive capsule, which is housed inside a submersible 316 L stainless steel body as standard. For corrosive applications Hastelloy diaphragms and other materials are available as options. Series 26 W vented gauge versions have cable with... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from PMC Engineering LLC
The MTM 3000 Miniature depth and level pressure sensor is available for applications where space is very limited. The housing diameter of 0.39 inches offers the user an ideal high performance level measurement in small diameter, i.e. 1/2" monitoring wells, stand pipes and bore holes. The Titanium... [See More]
- Meter Technology Type: Differential Pressure Sensors; Electrical Conductivity or Resistance
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogVoltage; AnalogCurrent
from Keller America, Inc.
Castello … is a device to measure and display digitally the liquid content of any tank. Castello … comprises an electronics enclosure and a pressure transmitter for level measurement. Castello …adapts to unlimited tank shapes and sizes, offers high accuracy. Castello …is... [See More]
- Meter Technology Type: Differential Pressure Sensors; Pressure Membrane
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Maximum Operating Pressure: 33.36
from PMC Engineering LLC
PMC ’s Miniature Electronic Pressure Transmitter has been especially developed for measuring pressures in paper mills and similar process industries where plugging of the diaphragm face is a problem. A body diameter of 1" permits installation flush with the inside wall of pipes 2" in diameter... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from PMC Engineering LLC
PMC ’s Miniature Electronic Pressure Transmitter has been especially developed for measuring pressures in paper mills and similar process industries where plugging of the diaphragm face is a problem. A body diameter of 1" permits installation flush with the inside wall of pipes 2" in diameter... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from PMC Engineering LLC
PMC ’s Miniature Electronic Pressure Transmitter has been especially developed for measuring pressures in paper mills and similar process industries where plugging of the diaphragm face is a problem. A body diameter of 1" permits installation flush with the inside wall of pipes 2" in diameter... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent
from PMC Engineering LLC
PMC specializes in reliable precision transmitters for fluid level measurement in challenging locations and applications since 1963. This compact, rugged transmitter combines two ceramic capacitive sensors to accurately measure drilling fluid density and level. Designed for simple installation into... [See More]
- Meter Technology Type: Capacitive/RF Admittance; Differential Pressure Sensors
- Level Measurement Type: Continuous Level
- Media Type: Liquid
- Output Options: AnalogCurrent