Differential Pressure Gauge

Product Details:

Select the Series 2000 Magnehelic® Gauges for a versatile low differential pressure gage with a wide choice of 81 models and 27 options to choose from. Using Dwyer’s simple, frictionless Magnehelic® gage movement, it quickly indicates air or noncorrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration, over-pressures and is weatherproof to IP67. Select the -HA High Accuracy Magnehelic® Gage option for an accuracy within 1% of full scale, located below in the Product Configurator.

Features:

• Easy to read gage through undistorted plastic face permits viewing from far away
• Patented design provides quick response to pressure changes means no delay in assessing critical situations
• Durable and rugged housing and high-quality components combine to provide longservice life and minimized down-time
• High accuracy option is twice as accurate as the standard Magnehelic® gage.
• Bezel provides flange for flush mounting in panel.
• Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.
• Precision litho-printed scale is accurate and easy to read.
• Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.

Applications:

• Filter Monitoring
• Air Velocity with Dwyer Pitot Tube
• Blower Vacuum Monitoring
• Fan Pressure Indication
• Duct, Room or Building Pressures
• Clean Room Positive Pressure Indication

Model Available:

Additional Information:

• Item Code: Series-2000

Product Details:

The Series MS2 Magnesense® II Differential Pressure Transmitter combines the proven stable piezo technology and the versatility of our original Series MS with additional features to reduce installation time and simplify ordering. Like the original Series MS, the second generation transmitter can be used as a linear pressure output or a linear velocity output with the square root extraction done in the transmitter. Additional parameters have been included to expand the square root capability to include flow measurements.

Features:

• Field selectable ranges and output signal reduce inventory and the chances of ordering an incorrect part
• BACnet® or Modbus® serial communications reduce wiring cost by daisy-chaining the transmitters
• Our integral field-upgradeable display or plug-in remote display tool save upfront material cost and allow for local viewing of measurements

Specification:

• Service : Air and non-combustible, compatible gases.
• Typical Accuracy : ±1% FS for 0.15 in w.c. (40 Pa), 0.25 in w.c. (50 Pa), 0.5 in w.c. (125 Pa), 2 in w.c. (500 Pa), 3 in w.c. (750 Pa), 5 in w.c. (1250 Pa), 10 in w.c. (2 kPa), 15 in w.c. (3 kPa), 25 in w.c. (5 kPa), 28 in w.c. (6.975 kPa); ±2% FS for 0.1 in w.c. (25 Pa), 1 in w.c. (250 Pa), and all bi-directional ranges.
• Zero & Span Adjustments : Digital push buttons.
• Loop Resistance : Current Output: 0 to 1250 Ω max; Voltage Output: Min. load resistance 1 kΩ.

Applications:

• Duct Static Pressure in Commercial Buildings
• Filter Monitoring in Air Handler Units
• Building Pressure in Pharmaceutical-Semi-Conductor Clean Rooms
• Air Velocity/Flow in VAV Systems

 

Other Details:

Additional Information:

• Item Code: Series-MS2

Product Details:

The SERIES 616KD-LR Differential Pressure Transmitter is designed for simplicity, making it the ideal choice for installers and maintenance professionals. These low range instruments not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instruments during calibration. With single digital push button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources or separate calibration devices are necessary.

Specification:

• Service : Air and non-combustible, compatible gases.
• Accuracy : ±0.25% FS for ±0.4" (100 Pa) and ±0.5" (125 Pa), ±0.5% FS for ±0.25" (60 Pa), and ±1% FS for ±0.1" (25 Pa).
• Zero and Span Adjustments : Push buttons.
• Loop Resistance : Current Output: 0 to 1250Ω max; Voltage Output: Min. load resistance 1kΩ.
• Electrical Connections : Screw type terminal block.
• Process Connections : Barbed, dual size to fit 1/8" & 3/16" (3 mm & 5 mm) ID rubber or vinyl tubing, or 1/4" NPT.
• Mounting Orientation : Vertical with pressure connections pointing down.

Features:

• Wide selection of low ranges and accuracy cover numerous applications minimizing components and standardizing on design
• Simple calibration push-buttons to set zero and span, saving time installing and maintaining over the service life
• Cost effective and compact device suitable for OEM applications where space, simplicity, and value are key
• Simultaneous current and voltage outputs
• Optional 1/4" NPT process connection allows for use with metal barbed fittings or compression fittings for use with metal tubing

Applications:

• Air handlers
• Variable air volume
• Duct pressure
• Filter monitoring

 

Options:

• AT Aluminum Tag
• COC Certificate of Conformance
• FC Factory Calibration Certificate
• NIST NIST Traceable Calibration Certificate
• TC Terminal Cover

 

Other Details:

Additional Information:

• Item Code: Series-616KD-LR

Product Details:

The Dwyer Series DM-2000 Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM-2000 housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic® gage. A wide range of models are available factory calibrated to specific ranges.

 

Pressure connections are inherent to the glass filled plastic molded housing making installation quick and easy. Digital push-button zero and span simplify calibration over typical turn-potentiometers. An optional 3.5 digit LCD shows process and engineering units. A single push button allows field selection of 4 to 6 engineering units depending on range.

 

Features:

• Zero and span controls provide easy calibration checks and shorter installation time to get device running and monitoring
• Quick response to pressure changes means no delay in signaling and alerting to critical situations
• Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
• Same size as Magnehelic simplifies field upgrade to digital pressure gage by reducing install steps
• Tamper proof button configuration to prevent accidental changes to the settings

Specification:

• Thermal Effect : ±0.055% F.S./°F (0.099% F.S./°C).
• Zero and Span Adjustments : Digital push-button zero and span.
• Electrical Connections : Screw-type terminal block.

Applications:

• Filter monitoring
• Fan pressure indication
• Static pressures in ducts or buildings
• Bi-direction ranges ideal for sensing fluctuating building pressure

 

Other Details:

 

Additional Information:

• Item Code: Series-DM-2000

Product Details:

SERIES 645 Wet/Wet Differential Pressure Transmitters are designed for use with compatible gases and liquids which can be applied to both the pressure and reference ports. Quick response capacitance sensor delivers a 4 to 20 mA output signal proportional to differential pressure with ±.25% accuracy. The Series 645 transmitters are ideal for process control, filter condition monitoring, refrigeration equipment, pump speed control, HVAC equipment, and liquid level measurement. For ease of installation and maintenance, order optional 3-valve manifold assembly. Bleed ports allow for total elimination of air in the line and pressure cavities.

Specification:

• Service : Compatible gases or liquids on both pressure and reference sides.
• Wetted Materials : 17-4 PH stainless steel, 300 Series stainless steel, fluoroelastomer and silicone O-rings and bleed screw seals.
• Pressure Limits : (High side) 1 to 5 psi: 20 x FS, 10 to 25 psi: 10 x FS, 50 psi: 5 x FS, 100 psi: 2.5 x FS; (low side) 2.5 x FS.
• Thermal Effects : (includes zero and span) ±0.02% FS/°F, 30 to 150°F (-1 to 65°C).
• Zero and Span Adjustments : Adjustable, ±1 mA, non-interactive.
• Loop Resistance : 0 to 1000Ω.
• Electrical Connection : Barrier strip terminal block with conduit enclosure and .875" (22 mm) diameter conduit opening.
• Manifold : Brass.
• Valve Type : 90° on/off.
• Process Connection : 1/4"-18 female NPT.

 Features:

• Versatile, high-accuracy device for liquid or gas supports designs requiring more precise measurements in support of application
• Optional 3-way valve manifold supports simplifying installation or removal of transmitter without interrupting process

Applications:

• Process control
• Filter monitoring
• Refrigeration equipment
• Pump speed control
• HVAC equipment
• Liquid level measurement

Other Details:

 

Additional Information:

• Item Code: Series-645

Product Details:

Series 607 Differential Pressure Transmitter combines very low ranges with exceptional stability, reliability and either ±0.25% or ±0.5% accuracy for the most demanding applications. Ranges from 0-0.1" to 0-25" w.c. Ultra thin glass clad silicon diaphragm design resists shock and vibration, practically eliminates drift. Certification to NIST standards is included with each unit. Tough stainless steel housing is NEMA 2 rated to protect against moisture and dirt. Use with air and other compatible gases.

Features:

• High stability at low pressure ranges provides exceptional accuracy for ensuring tight-control and minimizing costly out of specification conditions
• Provides sensitivity to pressure changes but resists vibration preventing drift and less accurate readings
• Stainless steel housing meets standards for lab and clean room applications

Specification:

• Service : Air and non-conductive, non-corrosive gases.
• Wetted Materials : Consult factory.
• Thermal Effects : ±0.015% F.S./°F (zero and span).
• Zero and Span Adjustments : Externally accessible potentiometers, non-interactive, ±10% F.S. adjustment.
• Loop Resistance : 0 to 1045 ohms Vmin=12V+[(.22A)(RL)].
• Electrical Connections : Screw terminals.
• Process Connections : Barbed stainless steel for 3/16" I.D. tubing.
• Housing : 300 Series stainless steel (NEMA 2).

Applications:

• Leak Detection
• Clean Room Control
• Lab and Fume Hood Pressure Control

 

Other Details:

Additional Information:

• Item Code: Series-607

Product Details:

Series 621 Pressure Indicator is a 1/8 DIN measuring and con trol ling instrument designed for positive, negative or differential pres sures of air and compatible gases. Pres sure readings are dis played on a large 3-1/2 digit LCD dis play while unit simultaneously pro duc es a standard 4-20 mA output signal. Over a dozen stocked rang es are available from 0-3 in. w.c. to 0-100 psid or choose metric units in rang es from 0-0.75 kPa to 0-690 kPa. Circuit design enables use in 2-wire current loops.

Specification:

• Service : Air and non-combustible, compatible gases.
• Thermal Effect : 0.025% F.S./°F (0.045% F.S./°C).
• Zero and Span Adjustments : Accessible potentiometers.
• Electrical Connections : Terminal block.
• Process Connections : Barbed for 1/8" (3.18 mm) I.D. tubing.
• Enclosure Rating : Face designed to meet NEMA 4 (IP66).
• Mounting Orientation : Not position sensitive.

Installation:
Location: Select a location where the temperature of the unit will be between 20°F and 120°F. Distance from the receiver is limited only by total loop resistance. See Electrical Connections. The tubing feeding pressure to the instrument can be run practically any length required but long lengths will increase response time slightly. Mount the instrument in a location that will not be subject to excessive temperature, shock or vibration. All models are designed for mounting in an enclosed panel.

Select the mounting position for the instrument on the panel. Prepare the panel by cutting and debarring the required opening. Refer to Figure A.

From the front panel, slide the instrument through the cutout. The housing gasket should be against the housing flange before installing. From the rear of the panel slide the mounting collar over the housing. Hold the housing with one hand and using the other hand, push the collar evenly against the panel until the springs are com-pressed. The ratchets will hold the mounting collar and housing in place.

Other Details:

Additional Information:

• Item Code: Series-621

Product Details:

Series 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, FM approved for use in Class I, Div 1, Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres (NEMA 7 & 9), Raintight NEMA 3 (IP54). Weatherproof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20 in w.c. (0.0075 to 5 kPa) and from .5 to 50 psi (0.035 to 3.5 bar). The unit is very light and compact — about half the weight and bulk of other explosion-proof or weather-proof switches with separate enclosures.

Features:

• Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation
• External set point screw provides easy access that simplifies making adjustments without opening or disassembling enclosure
• Easily accessible electrical connection simplifies the installation

Specification:

• Service : Air and non-combustible, compatible gases.
• Temperature Limits : -40 to 140°F (-40 to 60°C); 0 to 140°F (-17.8 to 60°C)for 1950P-8, 15, 25, and 50. -30 to 130°F (-34.4 to 54.4°C) for 1950-02.
• Pressure Limits : Continuous: 1950''s - 45" w.c. (0.11 bar); 1950P''s - 35 psi (2.41 bar); 1950P-50 only - 70 psi (4.83 bar). Surge: 1950''s - 10 psi (0.69 bar); 1950P''s - 50 psi (3.45 bar); 1950P-50 only - 90 psi (6.21 bar).
• Electrical Rating : 15 A @ 125, 250, 480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz
• Mounting Orientation : Diaphragm in vertical position. Consult factory for other position orientations.
• Set Point Adjustment : Screw type on top of housing..

Applications:

• HVAC applications
• Process applications
• All-weather applications

Other Details:

Additional Information:

• Item Code: Series-1950

Product Details:

The DigiMag® Series DM-1000 Digital Differential Pressure and Flow Gages monitor the pressure of air and compatible gases just as its famous analog predecessor the Magnehelic® Differential Pressure Gage. All models are factory calibrated to specific ranges. The 4-digit LCD can display readings in common English and metric units so conversions are not necessary. The simplified four button operation reduces set up time and simplifies calibration with its digital push button zero and span.

Specification:

• Accuracy : ±1% FS including linearity, hysteresis and repeatability; ±2% FS for ranges 1" w.c. and below.
• Thermal Effect : ±0.05% FS/°F typ.; ±0.10% FS/°F typ. for ranges 1" w.c. and below.
• Display Update : Selectable for 1 second, 10 minutes or update only from button push.
• Pressure Limits : Normal and bi-directional ranges 5 in w.c. and lower = 2 psi (13.7 kPa); Normal and bi-directional ranges 10 in w.c. and higher = 11 psi (75 kPa).
• Selectable Engineering Units : in w.c., psi, kPa, Pa, mm w.c., mBar, in Hg, mm Hg, FS (0-100% FS).
• Power Requirements : 9V battery, included, user replaceable or external power supply 9-24 VDC.
• Battery Service Life : Battery life depending on the Display Update setting: 150 hours (typical) if Display Update = 1 second; 9 months (typical) if Display Update = 10 minutes; 1.5 years (typical) if Display Update is disabled. Battery may last up to four times longer when using lithium-based battery ULTRALIFE U9VL-J.

Features:

• Field programmed reduces installation time
• User selectable parameters for pressure, air velocity or flow permits same device for multiple applications
• Specialized filter set point for alerts when maintenance is due
• Security levels permit matches the correct access to right skill

Applications:

• Filter monitoring
• Air velocity or flow
• Blower vacuum monitoring
• Fan pressure indication
• Duct, room or building pressures
• Clean room positive pressure indication

Other Details:

Additional Information:

• Item Code: Series-DM-1000

Product Details:

The Series DH3 Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1% full scale accuracy on ranges down to the extremely low 0.25" w.c. to 2.5" w.c. full scale. Ranges of 5" w.c. and greater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.

 

The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.

 

Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration.

Features:

• 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
• Full scale accuracy of 1% even on extremely low ranges, and 0.5% for ranges above 5 in w.c. provide for greater measurement precision
• Secure menu program provides access to device operation only for the right skill level

Specification:

• Service : Air and non-combustible, compatible gases.
• Accuracy : ±1.5% for 0.25" and ±0.25" w.c. ranges. Ranges 0.5" to 5" w.c. and corresponding bi-directional (except ±2.5" w.c.) ±1%; All other ranges: ±0.5% @ 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).
• Pressure Limits : Ranges ≤ 2.5 in w.c.: 25 psi; ±2.5", 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in w.c.: 9 psi.
• Thermal Effects : 0.020%/°F (0.036/°C) from 77°F (25°C). For 0.25" and ±0.25" w.c. ranges: ±0.03%/°F (±0.054%/°C).
• Display : Backlit 4 digit LCD 0.4" height LED indicators for set point and alarm status.
• Electrical Connections : 15 pin male high density D-sub connection. 18" (46 cm) cable with 10 conductors included.
• Process Connections : 1/8" female NPT. Side or back connections.

 

Other Details:

 

Additional Information:

• Item Code: Series-DH3

Product Details:

The Series MP Mini-Photohelic® Differential Pressure Switch/Gage combines the time proven Minihelic® II differential pressure gage with two SPDT switching set points. The Mini-Photohelic® switch/gage is designed to measure and control positive, negative, or differential pressures consisting of non-combustible and non-corrosive gases. Gage reading is independent of switch operation. Switching status is visible by LED indicators located on the front and rear of the gage. Set points are adjusted with push buttons on the back of the unit.

Features:

• Gage reading unaffected by switch operation and will continue to read pressure even during power loss
• Visible switch status LED provides indication of set point switching state
• Compact design but with the power of larger devices can meet the same application specifications

Applications:

• Fume hoods
• Dust collection
• Pneumatic conveying
• Clean room

Options:

• For optional 1/8" male NPT connections, add suffix -NPT to model numbers.
  Example: MP-000-NPT. No extra charge. Allow additional lead time.

Specification:

• Service : Air and non-combustible, compatible gases.
• Accuracy : ±5% FS @ 70°F (21.1°C). Gage face mounted in vertical position.
• Process Connections : Barbed for 3/16" ID tubing (STD); 1/8" male NPT (optional).
• Electrical Connections : Screw type terminal block. Accepts 22-12 AWG wire.
• Mounting Orientation : Gage face in vertical position.
• Set Point Adjustment : Push buttons.
• Standard Accessories : 2) mounting screws, (1) .050" hex allen wrench.

Other Details:

Additional Information:

• Item Code: Series-MP

Product Details:

SERIES MARK II Molded Manometers are of the inclined and inclined-vertical types. The curved inclined-vertical tube of the Model 25 gage provides higher ranges with more easily read increments at low readings. The Model 25 is excellent for general purpose work. The Model 40 inclined gage provides linear calibration and excellent resolution throughout its range. The Model 40 is ideally suited for air velocity and air filter gage applications. Both gage types are capable of pressure measurements above and below atmospheric as well as differential pressure measurements. Included with each Mark II manometer are two tubing connectors for 1/8" pipe or sheet metal ducts, two mounting screws, 1 ounce bottle of indicating fluid, red and green pointer flags and complete instructions.
The Model 25 also includes 8' of flexible double column plastic tubing. Portable operation of the Model 25 is made possible by the use of the optional A-612 portable stand. A short piece of tubing can be slipped over the Model 25 pressure connections to contain the gage fluid in transit.

The Model 40 contains two 4-1/2' lengths of clear plastic tubing, a plastic swing-out stand and leveling screw for portable operation. It also features convenient rapid shutoff pressure connections and integral overpressure safety traps.

Features:

• Broad ranging in easy to read calibrated increments
• Gages ideally suited for general measurements and specific air applications
• Compact, stationary or portable device, make it a simple to use tool for pressure measurement in OEM or user applications

Options:

• OEM Specials - All Dwyer® Mark II Molded Plastic Manometers can be supplied in OEM quantities with your name and special graphics and scale.

Model Available:

Additional Information:

• Item Code: Series-Mark-II