Explore robust 4-20mA output pressure sensors ideal for industrial process control. Benefit from noise immunity, loop power, live zero diagnostics, and long-distance signal transmission for PLC & DCS integration.
Our range of pressure sensors with 4-20mA current loop outputs provides a robust and reliable solution for industrial process measurement and control applications. This industry-standard signal offers excellent noise immunity, ideal for long-distance transmission back to PLCs or DCS systems without signal degradation, while the ‘live zero’ feature enhances system diagnostics by clearly indicating loop faults. Explore sensors designed for demanding environments, often featuring convenient loop-powered operation for simplified installation.
Lube oil pressure sensor for use on ship engines to measure up to 10 bar - Marine approved pressure sensor for use on lube oil up to 10 bar with a maximum media temperature of 125°C and environment temperature of 85°C.
Dirty water, sludge & sewerage tank level 400 mbar pressure sensor - Flush ceramic diaphragm pressure sensor for measuring level of a dirty water, sludge & sewerage tank.
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor- DMK457 Marine Approved Pressure Transmitter
DMK 331 Ceramic Diaphragm Industrial Pressure Transmitter
TPSA Precision High Pressure Transducer
- 10 bar g steam pressure transmitter, indicator and PNP switch - Steam pressure transmitter with LED display indicator for measuring 0 to 10 bars with in-built temperature reducer
- 10,000 psi hydraulic pressure transmitter and panel readout - Monitor hydraulic systems up to 10,000 psi with this robust transmitter and panel readout combination.
- Air classification system powder duct pressure transmitter with +/-15 kPa range and ATEX/IECEx IS cert - This pressure transmitter with open port design is ideal for monitoring duct pressures in powder air classification systems. It features ATEX/IECEx IS certification and a -15 to +15 kPa range.
- 16 bar, 200°C steam pressure transmitter and gauge - Combined pressure transmitter and indicator in one package with the option for use with high temperature media such as steam at 200°C
- 100 Pa bi-directional range differential air pressure transmitter - Bi-directional low range 4 to 20 milliamp differential pressure transmitter covering an air pressure range from -100 to +100 pascals, for cleanrooms, isolation rooms, and filter monitoring.
- SIL2 approved 10 bar pressure transducer with 4 to 20 mA output - Pressure transducer with SIL 2 approved electronics that provide a 4-20mA output over a 0-10bar working range.
DPS Low Differential Pressure Transmitter
DMP331 Precision Pressure Transmitter
IMP Low Cost Pressure Sensor
ATM/T Pressure and Temperature Dual Output Transmitter
- ATEX approved negative 10 mbar vacuum pressure transmitter - ATEX certified intrinsically safe pressure transmitter for measuring from 0 to minus 10 millibar gauge vacuum pressure.
- Monitoring high-pressure seawater pumps on merchant vessels with submersible pressure transmitters - Monitoring high-pressure seawater pump performance in marine washing systems. Submersible, corrosion-resistant pressure transmitters provide reliable measurements for both inlet and outlet pressures.
- Marine air lubrication system submersible seawater resistant air pressure transmitter - Measuring gauge air pressure inside a pipe near an underwater air injector for a ship's drag reduction system. Marine grade pressure sensors provide essential accuracy and seawater resistance for reliable component testing and performance tuning at depths down to 10 meters.
- Reverse osmosis desalination plant seawater pressure sensor with 1,500 psig range and 4-20mA output - Ensure efficient operation and prevent membrane damage in your reverse osmosis desalination system with this reliable pressure sensor designed for harsh seawater environments.
- Barometric pressure sensor for hurricane tracking on uncrewed surface vessel - Barometric pressure measurement in harsh marine environments. This application required a corrosion-resistant, IP67-rated pressure sensor for an uncrewed surface vessel used in hurricane research, capable of withstanding saltwater spray and high humidity.
- High pressure sensing in containerized reverse osmosis systems - A robust pressure transmitter solution for monitoring high-pressure seawater in reverse osmosis (RO) systems. Learn how duplex stainless steel construction provides superior corrosion resistance for desalination applications.
DMP331P Hygienic Flush Pressure Transmitter
DMP320 0.5 msec Fast Response Pressure Sensor
DMP343 Low Range Pneumatic Pressure Sensor
DPT200 High One Side Overload Differential Pressure Sensor
- Marine engine crankcase pressure and splash oil temperature with a dual output transmitter
- Bidirectional -50 to +50 Pa diff pressure transmitter with user calibration adjustment
- 100psig range 4-20mA output helium gas pressure sensor for research use
- Tumbling pharmaceutical powder totes wireless pressure monitoring
- Near-atmospheric pressure transmitter for hazardous gas test chambers
- Detecting water intake blockage on submerged reservoir intake screen using two sensors
- Solvent tank nitrogen blanketing monitoring with all welded IS/SIL2 bidirectional pressure transmitter
- Autoclave pressure sensor and display with 10 bar range
- High sulphuric acid content resistant 16 bar g 4-20mA water pressure sensor
- Aerospace component testing hi-temp air pressure sensor for up to 300C with 20 barg range
- 5000 psi WECO® 1502 pressure transmitter and loop indicator
- Low operating temperature plus/minus 1 psi pressure transmitter
Find out more about 4-20mA Output Pressure Sensors to determine which product options and capabilities will best meet your application requirements.
Pressure sensors incorporating a 4-20mA (milliamp) current loop output represent a cornerstone technology in industrial process measurement and control. This analogue signalling standard is specifically favoured for its inherent resilience against electrical noise interference, a common challenge in plant environments with heavy machinery and long cable runs. Unlike voltage signals which can attenuate significantly over distance, the 4-20mA current signal maintains its integrity, ensuring reliable pressure data transmission from the point of measurement back to central control systems, even over hundreds of meters.
A key advantage appreciated by process engineers and instrument technicians is the typical 2-wire configuration, often referred to as ‘loop-powered’. In this setup, the sensor draws its operating power directly from the same two wires that carry the output signal current. This simplifies wiring installation and reduces costs compared to sensors requiring separate power connections, making integration into existing plant infrastructure more straightforward. The required DC supply voltage (commonly 24Vdc) must simply be sufficient to drive the current through the total loop resistance, including wiring and receiver input resistance.
The ‘live zero’ characteristic of the 4-20mA signal, where 4mA corresponds to the sensor’s zero pressure reading (or the lower range value), provides a vital diagnostic function. A current reading of 0mA indicates a fault condition, such as a broken wire or sensor failure, rather than a valid zero pressure reading. This fail-safe indication is critical for maintaining process safety and operational awareness, allowing control systems like PLCs or DCS to immediately flag loop integrity issues.
These sensors interface directly with a wide array of standard process instrumentation. Inputs on Programmable Logic Controllers (PLCs), Distributed Control Systems (DCS), data loggers, chart recorders, and digital panel meters are commonly designed to accept this 4-20mA input directly. Within the control system, the 4mA to 20mA range is easily scaled to correspond to the sensor’s specific calibrated pressure range (e.g., 0 to 100 bar, -1 to 5 bar), translating the raw current signal into meaningful engineering units for monitoring, control logic, and historical trending.
Applications are diverse, ranging from monitoring hydraulic system pressures in manufacturing facilities and measuring hydrostatic level in tall chemical storage tanks to controlling fluid flow rates in pipelines within petrochemical refineries or monitoring steam pressure in power generation turbines. The robustness of the 4-20mA signal makes these pressure sensors suitable for demanding environments, including installations requiring intrinsic safety barriers for operation within potentially hazardous areas, where limiting electrical energy is paramount. Choosing the correct wetted materials and process connection type remains crucial to ensure compatibility with the specific fluid or gas being measured and the operational pressures involved.
Product Help
Checklist for 4 to 20 milliamps output pressure transmitter requirements
Define your 4-20mA output signal pressure transmitter requirements using this checklist:
- Pressure range?
- Output signal? 4-20 milliamps
- Accuracy?
- Electrical connection?
- Process connection?
- Process media type?
- Temperature range?