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100 Series Models 544 to 548 Pressure Switch
Brand: United Electric Controls LtdSIL-Certified Switch for Pressure, Vacuum, Differential Pressure & Temperature Applications.
The United Electric 100 Series is a cost-effective, SIL-certified switch for pressure, vacuum, differential pressure, and temperature applications in process plants and OEM equipment. The rugged, one-piece enclosure features a slanted cover for wiring accessibility.
A wide variety of microswitch and process-connection options make this versatile, SIL-certified switch ideal for applications requiring a rugged weather-proof device.
Typical applications that utilize the 100 Series are heat tracing, freeze protection, processing equipment (pumps, compressors), inputs for annunciator panels, and fire suppression systems.
Features- SIL-certified switch (SIL2)
- Rugged, NEMA 4X, epoxy coated enclosure
- SPDT or DPDT switch output
- Easy access wiring
- Single switch output
- Internal reference scale and adjustable deadband available
- Adjustable ranges: 30 “Hg Vac to 5000 psi
- -1 bar to 344 bar
- 0.2 “wcd to 500 psid
- 0,5 mbar to 34,5 bar
- -120° F to 650° F
- -85° C to 340° C
- Approvals: UL, CSA, CE, EAC (Russia), Inmetro (Brazil)
Specifications
Adjustment Type
- Captive Clamp Screws
- Factory Set (Pre-Set)
- Set Point Adjustment
Ambient Temperature Range
- -18° to 71° C (0° to 160° F), Set Point Typically Shifts less than 1 % of Range for a 28° C (50° F) Ambient Temperature Change
Applications
- Fire Suppression System
- Freeze Protection
- Heat Tracing
- Inputs for Annunciator Panel
- OEM Equipment
- Process Plants
- Processing Equipment (Pumps, Compressors)
Approvals & Certifications
- ISO 9001
Approvals & Certifications
- ATEX Directive (94/9/EC) II 1 G EEx ia IIC T6 Tamb: -50° to 60° C (-58° to 140° F)
- CE
- CRN
- CSA C22.2 No. 14, File # E42272
- GOST-R 51330.0, 51330.1, 51330.10 & 51330.14
- Low Voltage Directive (LVD) 73/23/EC & 93/68/EEC
- PCT 0ExiaIICT6 Tamb: -50° to 60° C (-58° to 140° F)
- PED: 97/23/EC
- UL (C,US) 508
Conduit Connection
- 1/2” NPT Female
Deadband
- psi: 0.1 to 15 (kPa: 0.7 to 103.4, Mbar: 6.9 to 1,034)
Diaphragm Material
- Buna-N
Electrical Connectors
- 1/2” NPT Female
- 7/8” Diameter Knockout
- 7/8” Hole to 1/2” NPT Female Watertight Conduit Fitting
- Common
Electrical Contacts
- Gold
- Normally Closed
- Normally Open
Electrical Rating
- 0.5 A Resistive, 0.03 A Inductive at 125 Vdc
- 10 A at 125 Vdc Resistive
- 2 A Resistive, 1 A Inductive at 24-30 Vdc
- 20 A, 125/250/480 Vac Resistive
- 30 A, 125/250/277 Vac Resistive
- Adjustable Deadband, External Manual Reset, 15 A at 125/250/480 Vac Resistive
- Close Deadband, 5 A at 125/250 Vac Resistive
- High Ambient, Vapor Sealed Switch, 15 A 125/250 Vac Resistive
Enclosure Finish
- Epoxy Powder-Coated
Enclosure, Body Material
- Gasketed Die Cast Aluminum
Environmental Protection
- Intrinsically Safe
- IP65
- NEMA 4X
Indication
- Red Status Light
Mounting
- Pipe
- Surface
Name Plate, Tag Material
- Stainless Steel
NPT Connection
- 1/8” NPT Female
Operating Pressure
- psi: -14.7 to 1,200 (kPa: -101.4 to 8,274, bar: -1 to 82.7)
Pressure Type
- Differential
Process Connection Material
- Epoxy Coated Aluminum
Proof Pressure
- psi: 2,500 (kPa: 17,200, bar: 172)
Repeatability
- Set Point Repeatability: ± 1.5 % of Adjustable Range
Service
- Oxygen Service Cleaning, Alcohol Cleaning to Remove Residue from the Process Connection
Set Point - Decreasing
- bar: 0.13 to 34.4
- kPa: 13.8 to 3,447
- psid: 2 to 500
Set Point - Increasing
- bar: 0.13 to 34.4
- kPa: 13.8 to 3,447
- psid: 2 to 500
Shock
- Set Point Repeats after 15 G, 10 millisecond Duration
Storage Temperature
- -54° to 71° C (-65° to 160° F)
Switch Type
- DPDT
- SPDT
System Pressure
- bar: -1 to 82.7
- kPa: -101.4 to 8,274
- psi: -14.7 to 1,200
Vibration
- Set Point Repeats after 2.5 G, 5 to 500 Hz
