Sealed Pressure Transmitters
Last Updated: April 1, 2025
Description
Sealed pressure transmitters are devices designed to measure pressure in various environments. They are equipped with a sealed diaphragm that isolates the sensing element from the process fluid, ensuring accurate pressure readings without direct contact with the fluid.
Working Principle
Sealed pressure transmitters operate by using a diaphragm that deflects when pressure is applied. This deflection exerts a force on an incompressible fill fluid, which is then transmitted hydraulically to a sensing diaphragm within the transmitter body. The deflection of this sensing diaphragm is the basis for the pressure measurement. These transmitters are useful because they provide accurate pressure readings while protecting the sensing element from harsh or corrosive process fluids.
Applications
Sealed pressure transmitters are commonly used in environments where the fluid temperature is high, the fluid is corrosive, or the fluid is viscous and may solidify in the sensor connection piping. They are also used in hygienic and sanitary applications, such as in the agri-food, pharmaceutical, and other industries where health regulations are stringent.
Advantages over other Pressure Transmitters
Sealed pressure transmitters offer several advantages over other types of pressure transmitters. They are particularly beneficial in applications involving high-temperature fluids, corrosive substances, or fluids that may freeze or solidify. Their design helps prevent sensor damage and ensures reliable performance in challenging conditions.
Limitations
One limitation of sealed pressure transmitters is that they may not be suitable for applications requiring direct contact with the process fluid for measurement. Additionally, the presence of a fill fluid can introduce potential errors if the fluid properties change with temperature or pressure.
Considerations
When selecting sealed pressure transmitters, it is important to consider factors such as initial costs, operating expenses, and maintenance requirements. These transmitters may have higher initial costs due to their specialized design, but they can offer long-term savings by reducing the need for frequent replacements or repairs. Durability and accuracy are key considerations, as well as the potential costs associated with replacement and maintenance over time.
from Holykell Technology Company Limited
This HAVC pressure sensor is specially developed for refrigerant pressure measurement. It uses ceramic capacitive sensitive components and measures absolute pressure and sealed gauge pressure. [See More]
- Pressure Measurement: Absolute; Sealed
- Working Pressure Range: 14.5 to 145
- Signal Output: Analog Voltage; 0.5~4.5V ratiometric
- Accuracy: 1
from ABB Measurement & Analytics
Thanks to Taylor ’s “All-Welded ” technology in remote seal manufacturing as well as to the longstanding expertise, 266ART can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. [See More]
- Pressure Measurement: Absolute; Sealed
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.1740 to 1450
from DigiKey
PRESSURE TRANSMITTER WITH GPS [See More]
- Pressure Measurement: Gauge; Sealed
- Accuracy: 0.2500
- Working Pressure Range: 290
- Features: Temperature Compensated
from ABB Measurement & Analytics
Thanks to Taylor ’s “All-Welded ” technology in remote seal manufacturing as well as to the longstanding expertise, 266NRH can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. [See More]
- Pressure Measurement: Absolute; Sealed
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.0290 to 8702
from DigiKey
PRESSURE TRANSMITTER WITH GPS [See More]
- Pressure Measurement: Gauge; Sealed
- Accuracy: 0.2500
- Working Pressure Range: 5802
- Features: Temperature Compensated
from ABB Measurement & Analytics
Thanks to the “All-Welded ” technology inherited by Taylor in remote seal design and manufacturing, 266DRH can offer unmatched total performance and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. ABB, leader in severe... [See More]
- Pressure Measurement: Differential; Sealed; Negative Pressure
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.0290 to 8702
from DigiKey
PRESSURE TRANS 0-1PSIG 4-20MA [See More]
- Pressure Measurement: Gauge; Sealed
- Working Pressure Range: 1
- Signal Output: Analog Current
- Accuracy: 0.2500
from ABB Measurement & Analytics
Thanks to Taylor ’s “All-Welded ” technology in remote seal manufacturing as well as to the longstanding expertise, 266MRT can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. [See More]
- Pressure Measurement: Differential; Sealed; Negative Pressure
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.0870 to 1450
from DigiKey
PRESSURE TRANS 0-2BARG 4-20MA [See More]
- Pressure Measurement: Gauge; Sealed
- Working Pressure Range: 29.01
- Signal Output: Analog Current
- Accuracy: 0.2500
from ABB Measurement & Analytics
The compact, robust transmitter housing is made of 316 stainless steel as a standard. Due to its high corrosion resistance it can be used in a wide variety of process and ambient conditions without any problems. The user friendly display allows simple and intuitive local transmitter operation. Full... [See More]
- Pressure Measurement: Absolute; Sealed
- Sensor Technology: Mechanical Deflection; Strain Gauge
- Signal Output: HART® Protocol
- Working Pressure Range: 0.8702 to 8702
from DigiKey
WIFI PRESSURE TRANSMITTER 0-15PS [See More]
- Pressure Measurement: Gauge; Sealed
- Accuracy: 0.2500
- Working Pressure Range: 15
- Operating Temperature: -4 to 176
from ABB Measurement & Analytics
Thanks to Taylor ’s “All-Welded ” technology in remote seal manufacturing as well as to the longstanding expertise, 266GRT can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. [See More]
- Pressure Measurement: Gauge; Sealed; Negative Pressure
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.0870 to 8702
from ABB Measurement & Analytics
Thanks to Taylor ’s “All-Welded ” technology in remote seal design and manufacturing, 266HRH can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material, capillary protection and mounting connections. ABB, leader in severe process... [See More]
- Pressure Measurement: Gauge; Sealed
- Sensor Technology: Mechanical Deflection
- Signal Output: HART® Protocol (optional feature); PROFIBUS® (optional feature); FOUNDATION (optional feature)
- Working Pressure Range: 0.0290 to 8702
from American Sensor Technologies, Inc. - AST
The AST46HA is a high accuracy Explosionproof Pressure Transmitter, designed for use in a variety of applications. Applying digital compensation, this product offers top performance over a wide temperature range. Utilizing Krystal Bond Technology ™, the sensing element will measure pressure in... [See More]
- Pressure Measurement: Compound (optional feature); Sealed
- Sensor Technology: Strain Gauge; Semiconductor Piezoresistive; Utilizes MEMS
- Signal Output: Analog Voltage (optional feature); Analog Current (optional feature)
- Working Pressure Range: 0.0 to 50
from OMEGA Engineering, Inc.
• Waterproof Case for Harsh Environments. • Compact Size for Ease of Use. • Ideal for Freon and Ammonia Applications [See More]
- Pressure Measurement: Absolute; Sealed
- Sensor Technology: Mechanical Deflection; Strain Gauge
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 5000
from PMC Engineering LLC
The ML6100 is a precision transmitter based on the well proven ATM.1st series from STS, but incorporating a PT1000 measuring element to provide a dual current loop or voltage outputs in either 3 or 4 wire configuration. The ML6100 offers pressure ranges up to 20,000 psi with static accuracy of <... [See More]
- Pressure Measurement: Absolute; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current
- Working Pressure Range: 0.0 to 20000
from Gems Sensors & Controls
Current Output. Gauge, Sealed and Absolute Models. Submersible, General Purpose and Wash Down Enclosures. Intrinsically Safe Models. The 4700 series pressure sensor provides precise laboratory type measurements in a rugged industrial package complete with turndown capabilities. Exceptional levels of... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Thin Film
- Signal Output: Analog Current
- Working Pressure Range: 10 to 10000
from Keller America, Inc.
The Valueline high accuracy pressure transmitter provides outstanding performance in any new or existing pressure measurement application. The Valueline can be calibrated to any pressure range between 2 and 15,000 psi with outstanding Total Error Band (TEB) accuracy, and provides your choice of... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed; Vacuum
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current
- Working Pressure Range: 0.0 to 217557
from L-com, Inc.
PT989-5kPV1J22B1C10S is a highly stable and reliable pressure transmitter with span and zero correction. PT989-5kPV1J22B1C10S pressure transmitter comes in a compact size, and is lightweight and stable. It can be used to measure pressure levels for many applications in metallurgy, mining, chemicals,... [See More]
- Pressure Measurement: Gauge; Sealed
- Working Pressure Range: 5000
- Signal Output: Analog Voltage
- Media: Liquid; Gas
from Micro Sensor Co., Ltd.
A digital pressure transmitter is a device that is used to measure and display the pressure of gases or liquids in industrial applications. Digital pressure transmitters typically have a display that shows the pressure reading in the desired units of measurement. These devices are commonly used in... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Working Pressure Range: -14.5 to 14504
- Signal Output: RS232/485; HART® Protocol; IIC, SPI protocol, RS485/HART Protocol
- Accuracy: 0.2500 to 0.5000
from American Sensor Technologies, Inc. - AST
With an overall length of less than two inches and a diameter of 0.7 inches, the AST4800 is the perfect solution for pressure measurement in confined areas. Utilizing AST's patented Krystal Bond Technology, the sensing element is free of welds, oil-fill, and internal o-rings. [See More]
- Pressure Measurement: Compound (optional feature); Sealed
- Sensor Technology: Strain Gauge; Semiconductor Piezoresistive; Utilizes MEMS
- Signal Output: Analog Voltage (optional feature); Analog Current (optional feature)
- Working Pressure Range: 0.0 to 100
from OMEGA Engineering, Inc.
• All Stainless Steel Body. • Heavy Duty Construction for Harsh Environments. • Available in Gauge, Sealed Gauge and Absolute Pressure. • Special MSHA Approved Model Available [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Working Pressure Range: 0.0 to 5802
- Signal Output: Analog Voltage
- Accuracy: 0.2500
from PMC Engineering LLC
The IMP series industrial pressure transmitter has a piezo-resistive ceramic pressure sensor, giving it excellent media compatibility. Every device is temperature compensated, calibrated and supplied with a traceable serial number and calibration certificate. The electronics incorporate a... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Current
- Working Pressure Range: 10000
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 …8.5 V.Signal... [See More]
- Pressure Measurement: Absolute; Differential (optional feature); Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current; RS232/485
- Working Pressure Range: 0.0 to 14504
from American Sensor Technologies, Inc. - AST
The AST4700 is a competitively priced, high quality stainless steel media isolated pressure sensor intended for the use of measurement of liquids and gases. Utilizing Krystal Bond ™ Technology, the AST4700 offers a one piece stainless steel sensing element free of welds, internal o-rings, and... [See More]
- Pressure Measurement: Compound (optional feature); Sealed
- Sensor Technology: Strain Gauge; Semiconductor Piezoresistive; Utilizes MEMS
- Signal Output: Analog Voltage (optional feature); Analog Current (optional feature)
- Working Pressure Range: 0.0 to 3000
from OMEGA Engineering, Inc.
bull; High Accuracy. • All Stainless Steel Construction. • Hermetically Sealed Design for Harsh Environments. • Available in Gage, Absolute, Sealed Gage, psi and Metric Ranges. • Optional Pressure Ports to Fit Most Industrial Applications. • Includes 5 Point NIST Traceable... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Strain Gauge
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 30000
from PMC Engineering LLC
The ATM.23 series is a precision pressure transmitter offering high performance and a rugged flexible design for a wide range of industrial applications. The transmitter is based on STS piezoresistive sensor technology with 20 years proven history. The modular construction provides manufacturing... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Current
- Working Pressure Range: 1 to 15000
from Keller America, Inc.
The " …LY" transmitter line benefits from smaller sensor dimensions, crevice-free diaphragms and low Total Error Band performance. The innovative signal conditioning circuit 'learns' thermally-induced zero and span errors during calibration. Then during operation, bias corrections are applied... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current
- Working Pressure Range: 2.9 to 1450
from OMEGA Engineering, Inc.
bull; Stainless Steel Diaphragm for Compatibility with Most Media. • 1/4 NPT Fitting For Fast, Easy, and Secure Installation. • Rugged Stainless Steel Case Protects Components from Industrial Environments. • Quick Disconnect Style for Easy Field Connections. • 2-wire, 4-20 mA... [See More]
- Pressure Measurement: Gauge; Sealed
- Sensor Technology: Mechanical Deflection
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 7500
from PMC Engineering LLC
The ATM.23 Series with high level voltage output is specifically designed for industrial test applications such as automotive, marine and aerospace. Exceptional reliability is achieved with the high overpressure rating, and the combination of high accuracy and good long term stability offer the user... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 1 to 15000
from Keller America, Inc.
Ultramodern welding techniques and advances in the miniaturization of electronic circuits now make it possible to manufacture a pre-insulated, piezoresistive micro-transmitter with properties that were no more than a dream 10 years ago. The circuit is based on the PromComp principle which KELLER... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 145 to 8702
from OMEGA Engineering, Inc.
bull; 0.15% Accuracy. • Internal Shunt Resistor for Easy System Checks. • 5-Point Calibration Included. • All Stainless Steel Construction. • Available in Gauge, Absolute or Sealed Gauge Ranges. • Cable or Connector Models. • Optional Pressure Ports to Fit Most... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Strain Gauge
- Signal Output: Analog Voltage
- Working Pressure Range: 0.0 to 145
from PMC Engineering LLC
Pressure Sensor for Test Applications - ATM.mini. The ATM.mini pressure transmitter is a high performance pressure transmitter suitable for use in rugged, high vibration environments from -40 to +255 ºF. The ATM.Mini provides a 2-wire, 4-20 mA or 0.5 - 4.5 VDC analog output within a lightweight... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Working Pressure Range: 0.0 to 1500
- Signal Output: Analog Voltage; Analog Current
- Accuracy: 0.0500 to 0.1000
from Keller America, Inc.
The Series 30X enables the OEM to offer superior performance without the need for huge R &D or capital expenditures, and with minimum amount of on hand inventory. Designed to be easily integrated into a wide variety of applications, the 30X features a flush-welded diaphragm and highly stable... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current; RS232/485
- Working Pressure Range: 14.5 to 14504
from OMEGA Engineering, Inc.
• 0.15% Accuracy. • Cable or Connector Models. • All Stainless Steel Construction. • Available in Gauge, Absolute, Sealed Gauge, psi and Metric Ranges. • 5-Point Calibration Provided. • Optional Pressure Ports to Fit Most Industrial Applications [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Strain Gauge
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 1450
from PMC Engineering LLC
The ASUH Series of high performance sub-miniature pressure transmitters have been designed for demanding installations where space is extremely limited and high vibration/temperaturee are anticipated. Sub-Miniature Size. 70 to 6000 psi Range. 4-20mA Output. ±0.25% Accuracy. Lightweight 0.4 oz [See More]
- Pressure Measurement: Sealed
- Working Pressure Range: 6000
- Signal Output: Analog Current
- Accuracy: 0.2500
from Keller America, Inc.
The C-series transmitters are noted for their ability to deliver high accuracy over a wide temperature range. This is achieved by means of mathematical modelling of the sensor characteristics and digital compensation. In order to do this, each transmitter is gauged over pressure and temperature,... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 29.01 to 1450
from OMEGA Engineering, Inc.
bull; Stainless Steel Construction. • Food Processing or Industrial Applications. • High Pressure Flush Diaphragm for Measurement of Difficult Fluids. • 3 m (10 ft) Cable with Conduit Connection for Installation in Harsh Environments. • Heavy Duty Cable Exit. • 4-20 mA... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Mechanical Deflection
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 5076
from PMC Engineering LLC
The TM series is a precision passive pressure transducer offering high performance and rugged flexible design for a wide range of industrial and OEM applications. The transducer is based on STS piezoresistive sensor technology with 20 years proven history. Low current consumption and pulsed... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 1 to 15000
from Keller America, Inc.
Series 22 DT was developed and homologated specially for use in so-called "bivalent" vehicles fitted with engines for combined natural gas/gasoline operation. The unconventional design with a small mass swept by the flow results in a fast response with temperature changes, the temperature being... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 0.0 to 363
from OMEGA Engineering, Inc.
• Optional FM Approved for Hazardous Locations. • All Stainless Steel Construction. • Sealed SS Case for Harsh Environments. • Rugged Industrial Construction [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Strain Gauge
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 3626
from PMC Engineering LLC
The EPT1005 Sensor is an electronically compensated pressure transmitter providing CANbus outputs in several common protocols. Offering accuracies of ≤0.1% FS including linearity, hysteresis, repeatability, zero and span setting errors. CANbus output. 1 to 20,000 psi. Absolute, Gauge or Sealed... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: CANbus
- Working Pressure Range: 1 to 20000
from Keller America, Inc.
Series 22 offers a reliable cost effective solution for customers requiring medium to high quantities, of mass produced transmitters. Utilizing the KELLER automatic brazing lines, this new technology allows crevice-free construction of the pressure port with no internal seals or O-rings, making... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage
- Working Pressure Range: 0.0 to 4351
from OMEGA Engineering, Inc.
• All Stainless Steel Construction. • Non-clogging Flush Diaphragm Design. • NEMA 4X Enclosure. • Paper Mills. • Printing Presses. • Thin Film Reliability. • 100% Production Calibrated. • NIST [See More]
- Pressure Measurement: Sealed
- Sensor Technology: Mechanical Deflection; Thin Film
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 2000
from PMC Engineering LLC
The DTM.OCS series pressure transmitters are polynomial compensated high performing pressure sensors which achieve total error bands up to 1.2%FS over a temperature range of -40 to 185 °F. The DTM.OCS are based on the standard RS485 ModBus protocol and can be easily connected to the control... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Working Pressure Range: 0.0 to 1500
- Signal Output: RS232/485; ModBus
- Accuracy: 0.0300 to 0.1500
from Keller America, Inc.
The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each field and... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current
- Working Pressure Range: -14.5 to 14504
from OMEGA Engineering, Inc.
bull; 0.05% Linearity. • 5-Point NIST Traceable Calibration Provided. • All Stainless Steel Construction. • Hermetically Sealed Design for Harsh Environments. • Available in Gage, Absolute, Sealed Gage Models. • Cable or Connector Models. • Optional Pressure Ports to... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Strain Gauge
- Signal Output: Analog Current
- Working Pressure Range: 0.0 to 30000
from PMC Engineering LLC
The ATM.1ST is an electronically compensated pressure transmitter providing a 2-wire, 4-20 mA analog output. The transmitter offers accuracies of ≤ 0.05% FS or ≤ 0.1% FS including linearity, hysteresis, repeatability, zero and span setting errors. Modular construction and the 20 year proven... [See More]
- Pressure Measurement: Absolute; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Current
- Working Pressure Range: 1 to 15000
from Keller America, Inc.
These piezoresistive transmitters have been designed for precision applications in industrial environments for pressures ranging from 0.2 to 1000 bar, liquids or gas. A Complete Range: Absolute, barometric, gauge (over- and underpressure) and differential for wet/wet applications. 13 nominal... [See More]
- Pressure Measurement: Absolute; Differential; Gauge; Sealed
- Sensor Technology: Semiconductor Piezoresistive
- Signal Output: Analog Voltage; Analog Current
- Working Pressure Range: 0.0 to 14504