Differential Pressure
pressure measurement relative to the surrounding atmospheric pressure.
See Also: Pressure, Absolute Pressure
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Product
Wet/Wet Differential Pressure Transmitter
655
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The Series 655 Wet/Wet Differential Pressure Transmitter converts a positive or a positive differential pressure measurement into a standard 4-20 mA output signal. Designed for use as a wet/wet differential pressure transmitter, units can be used to measure gas or liquid pressures compatible with 316/316L stainless steel wetted parts
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Product
Explosion Proof Differential Pressure Switch
1950
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Model 1950 Explosion-proof Differential Pressure Switch combines the best features of the popular Dwyer Series 1900 Pressure Switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed
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Differential Pressure Flow Meters
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Engineers can rely on the V-Cone dp flow meter to make life easier. McCrometer’s differential pressure flow meter is the versatile, highly compatible flow measurement solution for a variety of industries. When accuracy and repeatability are critical, the V-Cone’s performance brings superior value.
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Indicating Differential Pressure Transmitter
605
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The Series 605 Magnehelic Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure.
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Digihelic Differential Pressure Controller
DH
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The Series DH Digihelic Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money.
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Differential Pressure Adapter w/ App Compatibility
DPA1
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UEi Test & Measurement Instruments
The DPA1 measures positive, negative and differential pressure and is compatible with iOS® and Android™ mobile devices. Measurement units can be selected from the following scales: InH2O, mmH2O, psi, bar, mBar, kPa, InHg and mmHg. The mobile device screen will display a numeric reading. And is backed by a 1-year warranty.
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Low Differential Pressure Switch
1900
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Our most popular series combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications
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Product
Electronic Differential Pressure
Density Measurement
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An innovative software and hardware concept makes it possible to combine any two pressure transmitters of the VEGABAR 80 series into an electronic differential pressure system to measure density. Electronic differential pressure measurement is used for measuring density change and/or for compensation when the level needs to be measured.
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Product
Compact Differential Pressure Transmitters
Series 668B/D
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Our low cost SERIES 668B/D Compact Differential Pressure Transmitters are capable of sensing differential gage pressure with ±0.8% FS accuracy, and converts this pressure difference to a proportional high level analog output for both unidirectional and bi-directional pressure ranges. These transmitters can withstand up to 15 psig overpressure with no damage to the unit. The compact, lightweight design makes installation simple and easy. Units are protected against incorrect wiring, and include a protective terminal cover.
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Product
Mini-Photohelic Differential Pressure Switch/Gage
MP
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The Series MP Mini-Photohelic differential pressure switch/gage combines the time proven Minihelic II differential pressure gage with two SPDT switching setpoints. The Mini-Photohelic switch/gage is designed to measure and control positive, negative, or differential pressures consisting of non-combustible and non-corrosive gases.
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Pressure Transducers with CAN Bus Interface
P66
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The Validyne model P66 is a digital differential pressure transmitter designed for industrial pressure measurement applications. The on-board microprocessor provides high accuracy and improved stability in changing thermal environments. Communication via CAN Bus provides remote zero and span adjustment as well as digital pressure readings in engineering units or pressure counts.
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Product
High Speed Leak Tester
F28+
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Elevates the leak test to a whole new level of speed, flexibility and accuracy. Differential pressure decay leak measurement: vacuum to 20 bar. Multi-test leak tester. 128 programs. Integrated fill and dump valves. Optional auto fill: Vaccum – 500 mbar – 5 bar – 9 bar (inside the module).
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Product
Barometers
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These barometers can be found in the section to measure absolute pressure, differential pressure in respect to the atmosphere and negative pressure. There are barometers such as the DB2 digital barometers that have an internal memory for up to 750 Barometers to measure absolute pressure, differential pressure in respect to the atmosphere and negative pressure. readings and an analogue output of 0 to 1 volts. These barometers are perfect to measure atmospheric pressure, also called barometric pressure, is an expression for the weight of air (atmosphere) due to the earth''s gravitational pull. This pressure at sea level is 1013.25 mbars (milibars).
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Low Pressure Transmitters
HD404T / HD404ST Series
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Very low pressure relative or differential pressure, Low range 50 Pa, 4-20 mA or 0-10 Vdc
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Product
Micromanometer-Thermometer – 20 mbar
HD2114.0
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Portable pressure micromanometer thermometer with 20 mbar built-in sensor. It measures absolute, relative and differential pressure, as well as temperature.
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Product
Battery Data Logging Device
FST-AM
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Foresight Electronics Co., Ltd.
A data logger, is an electronic instrument that records measurements at set intervals over a period of time. Depending on the particular data logger, measurements can include: air temperature, relative humidity, AC/DC current and voltage, differential pressure, time-of-use (lights, motors, etc.), light intensity, water temperature, water level, dissolved oxygen, soil moisture, rainfall, wind speed and direction, leaf wetness, pulse signals, room occupancy, plug load, and many more.
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Product
Pressure Switches
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Ashcroft® pressure switches are provided in a variety of configurations to meet most installation requirements in nearly every industry. A long list of choices include differential pressure switches, explosion-proof pressure switches, NEMA 4 and NEMA 7 rated pressure switches as well as electronic pressure switches.
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Product
Clear Room Logger Transmitter
HD50CR
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The HD50CR is the ideal solution for monitoring of differential pressure, temperature and humidity in Clean Room applications.
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Product
General Performance Differential Pressure Transducers
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These general performance Baratron® differential capacitance manometers measure the difference in pressure between the inlet tube and the reference cavity. The reference cavity can be connected to any pressure or vacuum source, or be open to local atmosphere.
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Pressure Manometer
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These devices indicate the difference between two pressures (differential pressure), or between a single pressure and atmosphere (gage pressure), when one side is open to atmosphere.
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Digital Pressure Gauges
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Digital gauges with alarms, DC loop-powered gauges, differential pressure gauges, and a variety of features. They provide fast results with clear readability and very high accuracy.
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Product
XP2i Digital Pressure Gauge
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AMETEK Sensors, Test & Calibration
We provide some of the world’s most popular XP2i digital test gauges for a variety of applications and markets. Included are intrinsically safe "percent of reading" gauges, process gauges, differential pressure gauges, panel mounted gauges, and gauges specifically designed for use in the maritime industry. Whether you’re looking for a gauge with long battery life to mount in hard to reach locations, a gauge to collect and store readings in the field in extreme conditions, or one that doesn’t require recalibration for up to three years, we have the perfect gauge for you.
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Product
Micromanometer – Thermometer – Data Logger – 200 mbar f.s.
HD2134.2
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Portable Micromanometer-Thermometer Data Logger with 200 mbar built-in sensor. It performs measure of absolute, relative, differential pressure and temperature.
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Product
Power Transfer Unit
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The PTU is a bi-directional, back to back, variable/fixed displacement unit, with a differential pressure compensated displacement control. Displacement of the variable displacement unit is varied to maintain the required running and breakout pressure differential between the yellow and green systems.
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Gas Permeability Tester
QT-GPT
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Gas Permeability Tester- QT-GPT series is used to test the gas transmission rate (GTR) of packaging material by differential pressure method.
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Product
Very Low Pressure Variable Reluctance Sensor
DP103
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The Validyne DP103 is designed for exceedingly low differential pressure measurement applications where high accuracy is required under rough physical conditions. With full scale ranges down to -0.008 psid (-0.56cm H2O), this instrument is being used in the measurement of very low flow rates of gases where symmetrical pressure cavities are required for dynamic response. It is also used in very small leak detection and pressure null detection systems.
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Temperature Switches
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Ashcroft® temperature switches control high and low temperature operating limits in a broad range of applications. Simple and easy to install, they are available in a variety of configurations, including NEMA 4 and NEMA 7 temperature switches, OEM temperature switches, watertight temperature switches, explosion-proof temperature switches and differential pressure switches.
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Pressure Controllers for Flowing Processes
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Alicat Scientific, Incorporated
Use pressure controllers when gas is flowing through a process. They control absolute, gauge, or differential pressures, and can measure in-line pressures or be plumbed to measure process pressures at any point.
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Product
Ultra-thin Mass Flow Controller
DZ-100
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The DZ-100 inherits the same CRITERION™ technology—a differential pressure detection system for laminar viscous flow ranges—used on HORIBA STEC’s MFC, the D500. This innovative technology controls the mass flow of various gases with high precision. As with the D500, the user-configurable DZ-100 supports multi-range and multi-gas applications. The compact design of the MFC reduces the internal volume of the internal gas flow path, and the optimized control algorithm improves response characteristics. It uses a compact CPU with high processing capacity, and the piezo drive circuit and control CPU are installed in the MFC module while the power supply components are housed in a separate small control box. Up to four MFC modules can be controlled by connecting them with the dedicated miniature connectors.
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Product
High Line Pressure Variable Reluctance Pressure Sensor to 10,000 psid
DP360/DP363
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The DP360 can be calibrated for a full scale as low as ±50 psid while withstanding high static line pressure. Low differential pressure may be measured at static pressures as high as 10,000 psig with a maximum 3% FS zero shift error.





























