A low cost differential pressure gauge for use in measuring the pressure drop across filters, strainers, separators, valves, and pumps in Hazardous Locations.

• Simple, rugged, compact design.
• Working pressure 4000 P.S.I.G. (275 bar).
• Over-range protection to maximum pressure.
• Aluminum gauge body, Aluminum gauge body with 316 SS Insert, or 316 SS body.
• Wetted Internals - 316 SS and Ceramic moving components.
• Weather-resistant construction standard.
• Accuracy ± 3-2-3 % standard.
• Shatter Resistant lens
• 2 1/2" and 4 1/2" plastic dial assemblies.
• 3 1/2" and 4 1/2" anodized aluminum dial assemblies.
• Five Year Limited Warranty.
• Field wire terminal strip interface.
• Up to 10 A 120/240 VAC switching with DPDT Relay outputs.
• Hermetically Sealed Switch Outputs up to 3 amps in SPST configuration and up to 1 amp in SPDT configuration.
• SPST outputs available in Normally Open or Normally Closed configurations.
• Up to two independent adjustable switch points.
• 3/4" Conduit Interface
• CSA Certified to Canadian and US standards.
• Certified for Class I, Division I, Groups C & D and Class II, Division I, Groups E, F, & G; Class I, Division II, Groups A, B, C, & D, Class II, Division II, Groups F & G.
• Division II unit is NEMA 4X rated.

Operation & Description: The movement of a floating piston magnet against a calibrated spring senses differential pressure. The gauge pointer, outside the pressure housing, follows the movement of the piston magnet and indicates differential pressure. Magnetically operated reed switches, also located outside the pressure housing, actuate dependent upon the positional relationship between the reed switch and the internal magnetic piston. The reed contact(s) can be positioned to actuate within a defined percentage of the full-scale range of the gauge. For switching higher currents, the reed switches are used to control output relay(s).

The gauge body is available in Aluminum or Stainless Steel materials with Stainless Steel and Ceramic internal moving components. A new lower cost Stainless Steel option is also available for the Model 220 Gauge Body. In lieu of an all stainless steel body, a precision honed stainless steel tube insert is used within the standard aluminum body. This option provides a low cost alternative to the customer that needs 316 SS wetted parts.

The switching components are housed under a copper free Aluminum cover. The combination of the gauge body and the cover make up the flame-proof seal. Electrical interface to the internal field wire terminal strip is via a ¾" NPT industry standard conduit connection located through the gauge body.

The hazardous environment indicating differential pressure switch is available with one or two hermetically sealed reed switches with optional one or two DPDT relay outputs. Each switch is independently adjustable within a defined percentage of the full scale range of the gauge and is available in SPDT and SPST (normally open or normally closed configurations) for various load power ratings. The switches can be set to activate or deactivate on rising or falling differential pressure. If the optional relay output is specified, an input operating voltage must also be specified.

Model 522 "FILTER-MINDER"
Diaphragm-TYPE Differential Pressure Gauge
RANGE: 0-5 P.S.I.D. TO 0- 50 P.S.I.D. (.3 bar To 3.4 bar)

Gauge Features

• Range: 0-5 PSID thru 0-50 PSID (.3 bar thru 3.4 bar)
• Max. Static pressure 1000 P.S.I.G. (69 bar).
• Max. Differential pressure: 200 PSID (13.8 bar)
• Aluminum or 316 / 316L SS Gauge Body.
• Wetted 316 SS, Ceramic, & Acetal moving components.
• Available with Buna, Viton, or EPDM Elastomers
• 1/4" FNPT Process Connections (End Connected)
• Weather-resistant construction standard.
• Dial Accuracy +/- 5% standard.
• Switch Only (No Dial) available
• 0.8" weatherproof multicolored Dial
• 2 1/2" optional dial.
• Five Year Limited Warranty.

Switch Features

• Switches are optional
• Hermetically Sealed Switch Outputs up to 3 amps in SPST configuration and up to .25 amp in SPDT configuration.
• Switch Adjustable from 40% - 100% of Range *
• Up to 240 VAC/VDC voltage ratings
• Available with Flat Pack case with Jacketed Flying Leads or with DIN IP65 / NEMA 4X Plug in Connector.
• Optional Switch Set Feedback Decal
• Switch Location Top or Bottom
• CE Marking for Compliance with the Low Voltage Directive is available upon request.

* dependent on selected switch option.

Operation: Differential pressure is sensed by the movement of a piston magnet against a calibrated spring. The gauge pointer, outside the pressure housing, follows the movement of the piston magnet and indicates differential pressure. When equipped, magnetically operated reed switches, also located outside the pressure housing, actuate dependent upon the positional relationship between the reed switch and the internal magnetic piston. The reed contact(s) can be positioned to actuate within a defined percentage of the full-scale range of the gauge.

Temperature Limits: -40 °F (-40° C) to 200°F (93°C). These limits are based on the entire instrument being saturated to these temperatures. System (process) temperatures may exceed these limitations with proper installation. Contact our customer service representative for details.

Standards: All Model 522 Series differential pressure gauges either conform to and/or are designed to the requirements of the following standards:

• ASME B1.20.1
• NACE MR0175
• ASME B40.1
• NEMA Std. 250
• EN-61010-1
• UL Std. No. 50 & 508
• CSA-C22.2 No. 14

Factory Preset of switches available at no charge (Specify Setting on the order)

Description The Model 444 Series Differential Pressure Indicator offers a simple,yet functional design for use with filters, strainers, etc. This low cost indicator makes the perfect alternative to more costly Differential Pressure Gauges where readability, small size and price are important considerations.

Specifications:

• Differential Pressure Range 0-5 PSID (0-0.35 bar) to 0-25 PSID (0-1.7 bar)
• Accuracy ±5% F.S.
• Indication-Green / Red Sliding Indication with Nylon Lens
• Working Pressure 300 PSIG (20 bar)
• Max.Operating Temp. +200º F (93ºC)
• Body Material - Glass Filled Nylon (GFN)
• Internal Materials - GFN & Stainless Steel
• Elastomers Buna-N, Viton®
• Direct Mounting SLOTTED HEX BOLT 3/8"-24 UNF/1.75" SPACING
• Dimensions 1.15H" x 1"W" x 2.88L"

Viton® is a Registered Trademark of DuPont Dow Elastomers

Functions and Application

Precision differential pressure bellows-type gauge and Switch for Flow, Liquid Level, Balancing Leak Detection, Etc.

Range: 0-80" H2O (0-200 mbar) to 0-400" H2O (0-1 bar)

Model 106

Common Applications

• Pressurized Tank Level Monitoring
• Stationary Tanks- Horizontal or Vertical
• Tanker Transport
• Flow Indication
• Filter Monitoring for Gases

Product Features

• Over-Range Protection, High over Low and Low over High
• Micro Adjust Pointer
• Wide Selection of DP Ranges & Scales
• Bellows or Multiple Diaphragm Sensing Element
• Working Pressures up to 6000 PSIG (400 bar)
• Gauge Housings available in Aluminum, Brass, Carbon Steel and Stainless Steel 316/316L
• Wide Range of Elastomers

Product Features/Benefits

• Dry Design, No Liquid Fill Required for Over-range Protection
• Glass Reinforced Thermoplastic Gauge Front Is Standard
• Weather Resistant & Corrosion Resistant Gauge Front
• 270º Dial Arc
• Flow Scales Available
• 5 Year Warranty

Specifications:

• Differential Pressure Range 0-80" H2O to 0-400" H2O (or Equivalent) Uni-Directional or Bi-Directional
• Accuracy ±1% F.S. Standard, ± 1/2% F.S. Optional
• Dial Size 6" (Standard), 4-1/2" (Optional)
• Working Pressure up to 6000 PSIG (400 bar)
• Material of Construction – Body Aluminum, Brass, Carbon Steel, 316/316L Stainless Steel
• Materials of Construction - Internals Copper Alloy or Stainless Steel
• Switch Options
• 1 or 2 Switches
• SPDT or DPDT Outputs
• 10 AMP @ 30 VDC, 120/240 VAC
• Adjustable from 5 to 95% F.S.
• Electrical Enclosures Weather-proof or Explosion-proof

Special Features:

• Over-range Protection Full to Maximum Working Pressure
• Anti-Parallax Dials Furnished on Standard Range 6" Dials
• Panel Mounting Standard, Front or Panel 6" or 4-1/2"
• Pipe Mounting Kit Optional, 2" U-Bolt
• Wall Mounting Optional - Flush Panel or Rear Bracket
• NACE Compliance Optional
• Seismic Compliance Optional

Functions and Application

Precision differential pressure gauge and Switch for Flow, Liquid Level, Balancing Leak Detection, Etc.

Common Applications

• Pressurized Tank Level Monitoring
• Stationary Tanks- Horizontal or Vertical
• Tanker Transport
• Flow Indication
• Filter Monitoring for Gases

Product Features

• Over-Range Protection, High over Low and Low over High
• Micro Adjust Pointer
• Wide Selection of DP Ranges & Scales
• Bellows or Multiple Diaphragm Sensing Element
• Working Pressures up to 6000 PSIG (400 bar)
• Gauge Housings available in Aluminum, Brass, Carbon Steel and Stainless Steel 316/316L
• Wide Range of Elastomers

Product Features/Benefits

• Dry Design, No Liquid Fill Required for Over-range Protection
• Glass Reinforced Thermoplastic Gauge Front Is Standard
• Weather Resistant & Corrosion Resistant Gauge Front
• 270º Dial Arc
• Flow Scales Available
• 5 Year Warranty

Specifications:

• Differential Pressure Range 0-10" H2O to 0-80" H2O (or Equivalent) Uni-Directional or Bi-Directional
• Accuracy ±1% F.S. Standard, ± 1/2% F.S. Optional
• Dial Size 6" (Standard), 4-1/2" (Optional)
• Working Pressure up to 6000 PSIG (400 bar)
• Material of Construction – Body Aluminum, Brass, Carbon Steel, 316/316L Stainless Steel
• Materials of Construction - Internals Copper Alloy or Stainless Steel
• Switch Options
• 1 or 2 Switches
• SPDT or DPDT Outputs
• 10 AMP @ 30 VDC, 120/240 VAC
• Adjustable from 5 to 95% F.S.
• Electrical Enclosures Weather-proof or Explosion-proof

Special Features:

• Over-range Protection Full to Maximum Working Pressure
• Anti-Parallax Dials Furnished on Standard Range 6" Dials
• Panel Mounting Standard, Front or Panel 6" or 4-1/2"
• Pipe Mounting Kit Optional, 2" U-Bolt
• Wall Mounting Optional - Flush Panel or Rear Bracket
• NACE Compliance Optional
• Seismic Compliance Optional

Competitively priced, high performance quality differential pressure gauges and switches for use on filters, strainers, pumps, liquid level, local flow indication, etc.

Common Applications:

• Filter/Strainer Monitoring
• Compressed Air, Hydraulic, Refrigerant
• Pump Performance Testing
• Heat Exchanger Pressure Drop Monitoring
• Water Treatment Applications
• Tank Level Monitoring Horizontal or Vertical
• Flow Monitoring & Balancing

Product Features:

• DP Ranges from 0-50" WC to 0-100 PSID
• Elastomer Diaphragm Sensing Element,
• No Cross Port Leakage
• Up to 3000 PSIG Working Pressure (200 bar)
• Over-Range Protection,
• High over Low and Low over High
• Gauge Housings available in Aluminum, Brass, 316/316L Stainless Steel and Acetal Plastic
• Wide Range of Elastomers

Product Features/Benefits:

• Simple Rugged Designs
• Glass Reinforced Thermoplastic Gauge Front Is Standard
• Weather Resistant & Corrosion Resistant Gauge Front
• 5 Year Warranty

Specifications:

• Differential Pressure Range 0-50" H2O to 0-100 PSID
• Available in a Variety of Equivalent Ranges and/or Flow Scales (Square Root)
• Accuracy ±2%* or ±5% of Full Scale
• Dial Size 2-1/2" Rd. (Standard)
• 4-1/2" Rd. (Optional)
• Working Pressure Alum and S.S. - 3000 P.S.I.G. Brass - 1500 PSIG
• Material of Construction – Body: Aluminum, Brass, or 316 Stainless Steel
• Materials of Construction – Internals: 316 Stainless Steel and Elastomer Diaphragm

Switch Options: (Terminal Strip Interface)

• 1 or 2 - SPDT 3W, 125 VAC/VDC, 0.25 amps
• 1 or 2 - SPST (Normally Open) 25W, 240 VAC/VDC, 0.5 amps
• Electrical Enclosures NEMA 4X and NEMA 7
• CSA and UL listed
• CE Marked in Accordance With Low Voltage Directive

Hazardous Locations

• Div I
• Div II

Special Features::

• Over-range Protection Full to Maximum Working Pressure
• Panel Mounting Standard, Front or Rear Panel
• Pipe Mounting Kit Optional - 2" U-Bolt
• Wall Mounting Optional - Rear Mount
• NACE Compliance Optional