BD Sensors offers differential pressure sensors for gases and liquids. Choose from 4-20mA, HART, 0-10Vdc, RS485 outputs. Ideal for HVAC, labs, clean rooms, and process plants.
Differential Pressure
Differential pressure measurement instrumentation information & help guides for measuring the difference in pressure between two measurement points, such across a filter, ventilation fan or along a length of pipe.
What can a DP sensor be used to measure beyond differential pressure?
Differential pressure sensors offer functionality beyond their primary purpose. Explore the unexpected measurements and applications that these multi-purpose sensors can be adapted to support.
Measuring flow rate of a liquid or gas using a dp sensor
An introduction to the dp flow method of using a differential pressure sensor for measuring the flow of liquids and gases.
Measuring density of a liquid using a dp sensor
This guide provides an overview of methods for measuring liquid density using differential pressure sensors in various tank configurations and conditions.
Measuring liquid level in a tank using a dp sensor
Differential pressure sensors can be used to measure liquid level in a tank. Here we will explain how a DP sensor is used to measure liquid level.
Measuring vacuum as a negative gauge pressure using a dp sensor
Learn how a differential pressure sensor (dp sensor) can be used to measure a partial vacuum as a negative pressure relative to local surrounding air pressure.
Measuring vacuum as an absolute range using a dp sensor
Find out how to use a differential pressure sensor (dp sensor) to measure a partial vacuum as a positive pressure relative to full vacuum.
Measuring barometric pressure using a dp sensor
Learn the method to convert a differential pressure (DP) sensor for barometric pressure measurement.
Measuring absolute pressure using a dp sensor
Learn the method to convert a differential pressure (DP) sensor for absolute pressure measurement.
Measuring gauge pressure using a dp sensor
Differential pressure sensors can double as gauge pressure sensors. Here we will explain how a DP sensor is used to measure gauge pressure.
Low Range DP Voltage Output Transducers
Low pressure range dp transducers for measuring draft pressures in ventilation systems or air extraction systems.
Digital Interface DP Sensors
Differential pressure sensors with digital interfaces for RS485, RS232 or USB communications with a computer.
Air DP Sensors
Air differential pressure sensors for monitoring and controlling air pressures across filters, through ventilation control vanes, in laminar air flow cabinets and between clean room partition walls.
Intrinsically Safe DP Sensors
Intrinsically safe differential pressure sensors with EEx certification for use in potentially explosive atmospheres with an intrinsically safe zone barrier.
Rangeable DP Sensors
Rangeable differential pressure sensors with output signals that can be adjusted by the user to elevate or suppress the zero position and turn down the full range span.
Low Range DP Sensors
Low range differential pressure sensors for measuring very small pressure differences.
High Accuracy DP Sensors
High accuracy differential pressure sensors for measuring with a high degree of accuracy and resolution to obtain precise dp readings.
Inward air-flow DP sensor with 1 sec response time
This DP sensor has response time of less than 5 milliseconds, and will measure the difference between the closed system and the surrounding air in both directions.
Measuring negative pressure using a positive differential pressure range
How can you use a differential pressure measurement device to measure a negative pressure if it has been factory configured to measure a positive pressure range without making any adjustments to the electronics or the signal output?
DPT200 High One Side Overload Differential Pressure Sensor
DP transmitter for measuring pressure difference between two pressure points which can tolerate up a very high overload pressure independently on either the positive or negative side port or both together at the same time.
High and Low Side Pressure to Differential Pressure Calculator
This tool will calculate the differential pressure from a high and low side pressure reading and convert any combination of pressure units for each pressure value.
Engine test cell fuel filter 2.5 bar differential pressure sensor with ATEX approval
Sensor to measure differential pressure across fuel filters in an engine test cell on diesel and kerosene.
4 x clean rooms pressure, humidity & temperature measurement system
A complete clean room measurement system for 4 separate rooms, each with its own room pressure, humidity and air temperature indicator, and a central monitoring unit for clean room corridor or control room.
Portable data acquisition trolley +/-20 kPa dp RS485 Modbus RTU interface air pressure sensor and display package
A digital display, pressure sensor and digital interface module package for use on portable data acquisition trolleys to measure pressure of air over a range of -20 to 20 kPa diff from two 6.6mm dia x 11mm barbed hose connections, and sending the corresponding reading via a RS485 Modbus RTU interface through the terminal block connector electrical connections.
DP Flow Transmitter Output Calculator
This differential pressure flow transmitter square root extraction 4 to 20 milliamp current output calculator provides a way to determine the flow output reading from the pressure drop measured across an orifice plate and the differential pressure transmitter range.
-200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
A bidirectional low range pressure transmitter for venturi tube use to measure pressure of air in a venturi tube over a range of -200 to 200 Pa from the 6.6mm dia x 11mm barbed connections process connection, and sending the corresponding 4-20mA signal through the M12 x 1.5 cable glands with 5 internal screw terminals electrical connection.
-3 to 4 mbar dp range 4-20mA ATEX approved biogas pressure sensor for process control use on a 1bar line
A low range differential pressure sensor for process control use to measure pressure of biogas over a range of -3 to 4 mbar diff on a 1 bar biogas line from two 1/4 NPT female process connections, and sending the corresponding 4-20mA signal through the weatherproof cable electrical connection.
-15psig 0-10V out negative pressure transducer and display for air extraction use
A digital display pressure transducer for air extraction use to measure negative pressure difference of air inlet over a range of 0 to -15 psi g from a 1/4 NPT male process connection, and sending the corresponding 0-10Vdc signal through the DIN plug electrical connection.
-3 to 3 psi dp range high accuracy 4-20mA air pressure transmitter for water treatment use
A high accuracy low bi-directional range differential pressure transmitter for water treatment use to measure pressure of air over a range of -3 to 3 psi differential from two 1/4”-18 NPT internal process connections, and sending the corresponding 4-20mA signal through the 1/2" NPT internal cable gland electrical connection.
1 inH2O dp range wall mounted HEPA air filter pressure gauge with 4-20mA output
Low range digital display pressure gauge with 4-20mA output for wall mounted use in HEPA air filter measurement applications, capable of measuring 0 to 1 inH2O diff pressure with 1% accuracy and connected using a 6.6mm dia x 11mm barbed connection fittings.
1 inH2O differential intrinsically safe 4-20mA out air pressure sensor for HVAC use
A low range intrinsically safe pressure sensor for HVAC use to measure pressure of air over a range of 0 to 1 inH2O differential from two G1/4 female process connections, and sending the corresponding 4-20mA signal through the M20 x 1.5 cable gland electrical connection.
PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer
The PrimAtü 10 low cost low range differential air pressure transducer can detect and display both positive and negative differential pressure variations of very low low pressure ranges from 0.5 up to 1000 mbar/hPa, and output the pressure as a 4-20mA, 0-20mA or a 0-10Vdc analog output.
5 psi dp 0-10V out air pressure sensor for automation flow rate testing use on a 15psi line
A low range differential pressure sensor for manufacturing automation flow rate testing use to measure pressure of air over a range of 0 to 5 psi diff on a 15 psi air line from two G1/8 female process connections, and sending the corresponding 0-10Vdc signal through the integral cable electrical connection.
-1 to 6 bar differential RS485 Modbus RTU freshwater pressure sensor for farming use on a 6bar line
A compound range differential pressure sensor for farming use to measure pressure of freshwater over a range of -1 to 6 bar diff on a 6 bar freshwater line from two G1/4 male process connections, and sending the corresponding RS485 Modbus RTU signal through the M12 connector electrical connection.
3inH2O differential 4-20mA nitrogen pressure sensor and display for annealing furnace flow control use
A digital display and pressure sensor for annealing furnace flow control use to measure pressure of nitrogen over a range of 0 to 3 inH2O differential from two 1/8 NPT male process connections, and sending the corresponding 4-20mA signal through the M12 connector electrical connection.
100mbar dp range 0-5Vdc amplified output air pressure sensor for aerospace research test rig use
A pressure sensor with internal amplifier for aerospace research test rig use to measure pressure of air over a range of 0 to 100 mbar differential from two 6mm flexible tubing connections, and sending the corresponding 0-5Vdc signal through the DIN plug electrical connection.
10 mbar differential 0-10Vdc output air pressure sensor for building management use
A pressure sensor for building management use to measure pressure of air over a range of 0 to 10 mbar differential from two G1/8 female process connections, and sending the corresponding 0-10Vdc signal through the integral cable electrical connection.
0.1 inH2O differential range 0-10Vdc output between rooms air pressure sensor
A pressure sensor for between rooms use to measure pressure difference of air over a range of 0 to 0.1 inH2O differential from two flexible tube connections process connections, and sending the corresponding 0-10Vdc signal through the pcb screw terminals electrical connection.
20 kPa negative differential range air pressure gauge and sensor with tubing fitting
Digital display negative differential pressure gauge and sensor for use in vacuum air measurement applications, capable of measuring 0 to 20 kPa DP with 1% accuracy and connected using a 6.6 x 11 mm tube fitting.
10bar differential range 4-20mA output air pressure sensor for leak testing use on a 110bar line
A high accuracy pressure sensor for leak testing use to measure pressure of air over a range of 0 to 10 bar diff on a 110 bar air line from two 1/4 NPT female process connections, and sending the corresponding 4-20mA signal through the M12 connector electrical connection.
10Pa diff range 0-20mA output air pressure sensor for automotive component testing
A very low range pressure sensor for automotive component testing use to measure pressure of air over a range of 0 to 10 Pa diff from two barbed tube hose connections, and sending the corresponding 0-20mA signal through the DIN plug electrical connection.
20 Pa DP range 0-10V output air pressure sensor for building management use
A low range differential pressure sensor for building management use to measure pressure of air over a range of 0 to 20 Pa diff from two barbed tubing connections, and sending the corresponding Other signal through the Other electrical connection.
15psi dp range 4-20mA air pressure sensor for chamber airflow testing use on a 15psi line
A pressure sensor for chamber air flow testing use to measure pressure of air over a range of 0 to 15 psi diff on a 15 psi air line from two G1/8 female process connections, and sending the corresponding 4-20mA signal through the DIN plug electrical connection.
Climate room over/under pressure, temperature & RH monitor & controller
Wall mounted instrument for monitoring & controlling the climate in a room including room pressure, humidity and temperature sensor.
ATEX rated room ±100 Pa differential pressure transmitter
Differential pressure transmitter with a -100 to +100 Pascal range for measuring the difference in pressure between the inside and the outside of a room, in an ATEX zone.
1psi wet/wet differential pressure transmitter for 2000 psi line pressure
Differential pressure transmitter with an output scale to measure over 0 to 1 psi pressure drop on a 2000 psi system line pressure.
Pitot tube air flow calculation 1000 hPa differential pressure transmitter
Air flow differential pressure transmitter for measuring difference between pitot tube and static port pressure up to 1000 hectopascals.
1 bar range pressure transmitter with 400 bar overpressure protection
Pressure transmitter with a 400 bar maximum overpressure capability for measuring over a 0 to 1 bar pressure range.
4 inch water column range 4-20mA differential pressure sensor for liquids
Low range wet/wet dp sensor for measuring differential pressure of a liquid from 0 to 4 inches of water column.
DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
The DPS 300 is a low range HVAC differential pressure sensor. The lowest possible pressure range is 0…100 pascals. 2 or 3 switchable pressure ranges, plus volts or current output are included with most standard configurations.
10 kPa orifice plate differential pressure transmitter for water flow measurement
Pressure sensor for measuring the differential pressure generated by water flowing through an orifice plate in a pipe, and converting the output to a water flow measurement.
Ethylene glycol antifreeze compatible 300 pascal dp sensor
300 pascal differential pressure sensor for measuring ethylene glycol 50/50 antifreeze coolant.
Hydraulic power unit synthetic fluid filter dp transmitter
Prevent contamination of a hydraulic power unit by monitoring the differential pressure across a synthetic oil filter with htis DP transmitter.
DPT200 Pressurised Tank Level Differential Pressure Transmitter
Pressurised tank liquid level differential pressure cell transmitter for process plant storage.
Compressor inlet air filter pressure difference sensor
Measure the air intake filter pressure difference on an industrial air compressor with this -100 to +100 mb range, 0 to 10 volt output differential pressure sensor.
250″wc Orifice plate flow measurement dp transmitter
This differential pressure (dp) transmitter can be used to measure the difference in upstream and downstream flowing pressure either side of a orifice plate.
Vacuum pump inlet to outlet differential pressure sensor with 1500 Torr range
Differential pressure sensor to measure the differential pressure between the inlet and outlet of a vacuum pump.
Biogas HDPE cover PD blower pressure sensor
The XMD is a low range process pressure transmitter with an all stainless steel 316L wetted parts suitable for measuring the pressure of a biogas inflated HDPE cover to control a positive displacement pump.
100mb leak testing dp transmitter with 1mb accuracy & 10bar overpressure rating
The XMD differential pressure transmitter has an accuracy of 0.1% FSO for turn-down ≤ 5:1, and an overpressure on either side of up to 130 bar.
Differential Pressure Voltage Output Transducers
Differential pressure transducers with amplified volts output for measuring the dp of liquids and gases.
Wet / Wet Differential Pressure Sensors
Wet/Wet differential pressure transducers and transmitters which are compatible with liquids on both positive and negative side process connections.
Biogas ATEX 4-20mA pressure transmitter for 0 to 20 mbar range
ATEX approved 4-20mA output pressure transmitter for measuring biogas over 0 to 20 mbar gauge. The XMD has a stainless steel 316L diaphragm and process connection, with a FKM seal for compatibility with biogas.
1 hPa Positive Room Pressure Sensor, Switch & Display
A 100 Pascal range positive room pressure sensor with a 0-10 volt analogue output signal relating to the inside/outside room pressure difference.
Low range ATEX approved 100 Pascal range DP transmitter
The DPT200 is a robust ATEX approved differential pressure transmitter which has a very low range of 100Pa.
Solvent compatible +/-100mWG dp transmitter with PTFE seals
Differential pressure transmitters to use on Nitrogen and/or air containing low levels of flammable solvents.
Low Differential Pressure Transmitters
Low differential pressure transmitters for measuring small pressure differences between two measurement points on across ventilation fans, air filters or clean room walls.
Differential Pressure Transmitters
Differential pressure transmitters for measuring the DP of fluids and gases across particle filters and along a length of pipe to monitor flow.
DP transmitter for 10bar water line strainer cleaning indication
We have an application for a DP transmitter to indicate when a strainer needs to be cleaned.
Differential Pressure Sensors
Differential pressure sensor product selection guide for sensors used to measure the difference in pressure between two points.
4 to 20 inWG Adjustable Differential Pressure Switch
Differential pressure switch for use over the range from 4 to 20 inches of water gauge (inWG) diff
Measure filter dp to 20mbar & withstand 1bar cleaning pulse
I am looking to measure a differential pressure across a filter element. Air is being drawn through the filter via an extraction fan.
+/- 2.5 mbar (1 inH2O) DP Pressure Gauge
DP pressure gauge with a bi-directional compound range of -2.5 to +2.5 mbar/-1 to +1 inH2O differential pressure range
Using 25 mbar DP sensor on vacuum below 0.2 bar absolute
I would like to measure a differential pressure of 0 to 25 mbar in a vacuum of < 0.2 bar absolute pressure.
Clean room temp, RH and pressure monitoring
Clean room monitor for temperature, relative humidity 0 to 99% RH and pressure from minus 100 to +100 Pa
How do you measure flow rate with a dp cell
How do you use a dp cell measuring a span of 0-500 mmH2O with an o/p of 4-20 mA to control a flow rate of 0-1000 L/h for a flow meter range?
Bi-directional -20 to +100 Pa clean room air diff pressure transmitter
Air diff pressure transmitter for HVAC application to measure in the range of -20 to +100 Pa with an active analog output of 4 – 20 mA
Hydro power plant sea water high accuracy DP transmitter
Seawater compatible high accuracy differential pressure transmitter with an accuracy of 0.15% FS over a operating temperature range of -10 to 80°C
90 degC air differential pressure transmitter and digital display
differential pressure transmitter with an attached digital display for use on high temperature air up to 90 degC with a range of 0 to 250 mmWC
Pressure Calibrator for Pressure Transmitter Calibration – ADT672
The ADT672 series of pressure calibrators are precision digital pressure gauges with electrical measurement for pressure transmitter calibration
ADT681 Digital Pressure Gauge
The ADT681 digital pressure gauge family covers a wide range of pressures from as low as 1 inH20 differential to as high as 36,000 psi gauge.
3 bar differential pressure sensor for sea water
Differential pressure sensor with all Hastelloy C276 diaphragms and process connections which are highly resistant to sea water corrosion
Low delta P sensor with 200mmH2O range and response time < 5ms
The DMD331 uses silicon technology which is very small compared to other sensing technologies which would have a more limited response time.
DMD341 Compact Differential Air Pressure Sensor
Small size dp sensor for measuring differential air pressure on HVAC, compress air and pneumatic control systems.
DPS Low Differential Pressure Transmitter
Ultra low differential pressure transmitter for HVAC applications with 4-20mA current loop or amplified voltage output signal in pressure ranges from 0.1 mb up to 1 bar differential.
Differential Pressure
A guide to differential pressure measurement including explanations, applications and choice of products for measuring differential pressure
Static Line Pressure
Static Line Pressure is the total pressure present at a particular point along a pressurised pipe.
Wet/Dry
Wet/Dry describes a dp measurement device for use with a liquid on the positive pressure side and a dry/non-condensing gas on the negative pressure side.
Wet/Wet
Wet/Wet describes a differential pressure measurement device which is compatible with liquid on both the positive and negative side process connections.
Dry/Dry
Dry/Dry describes a differential pressure measurement device which is only compatible with dry/non-condensing gas on both the positive and negative pressure side.
Clean Room Monitor for Air Differential Pressure, Temperature and Humidity – PMDS4
The PMDS4 clean room monitor is designed for positive and negative monitoring of differential air pressure between the inside and outside of a clean room.
Air Replacement Plant (ARP) 100 mm H2O differential pressure transmitter
Differential pressure transmitters for instant monitoring of the air flow going through the painting booth interior
Plenum chamber differential pressure transmitter with 100 mmWG range
Differential pressure transmitter for measuring fan plenum chamber air pressure with a 0 to 100 mm of water column range
Negative room pressure monitor and logger for multiple zones
Monitoring system to measure negative room pressure inside each of five interior zones to eliminate the spread of dust.
Vacuum differential pressure transducer with 60kPa range
Vacuum differential transducer for using with a variable frequency drive to control vacuum air pressures down to 60 kilopascals (kPa).
Minus 0.25 inWG differential pressure transmitter for negative air pressure difference
Pressure transmitter which will measure o to -0.25 inches of water differential air pressure and output a linear signal over a current scale of 4 to 20 milliamps.
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.
Compound +/-2.5 mbar DP transmitter, indicator & alarm switch
Differential pressure transmitter with a signal & alarm warning output for measuring a compound scale from a vacuum of -2.5mbar to a pressure of 2.5mbar.
0-100Pa air pressure transducer with a 0-10V analog output
Air pressure transducer for measuring 0 to 100 pascals with an analog output signal of 0 to 10 volts.
10 mmWC draft fan differential pressure transmitter
Low range dp transmitter for measuring 0… -10mmWC to maintain constant negative pressure across an induced draft fan fitted with a variable frequency drive.
20 pascal differential pressure transducer for clean rooms
Voltage output transducer for cleanroom differential pressure measurement. This transducer has 0 to 20 pascals range for measuring very small positive pressure.