The
Fisher™ 2100 series offers rugged and reliable level switches designed for use in oil and gas field processing operations. These devices accurately detect high or low liquid levels and are trusted components in safety shutdown systems.
Key Models:• Fisher 2100 – Pneumatic on/off switch
• Fisher 2100E – Electric on/off switch with explosion-proof construction
How It Works• Both models use a displacer-style sensor housed in an external cage mounted to the side of a process vessel.
• The sensor reacts to changes in liquid level and triggers either a pneumatic or electrical switching action, depending on the model.
• A corrosion-resistant torque tube isolates the switch mechanism from the process fluid for long-term reliability.
Key Features• Field-Reversible Switching
Easily change between high-level and low-level actuation without extra parts.
• Explosion-Proof & Flame-Proof Design
Especially in the 2100E model, suitable for hazardous zones with compliance to major certifications.
• Flexible Mounting Options
Both left-hand and right-hand configurations are available to match installation constraints.
• Displacer Cage with NPT Ports
Two 1-inch NPT pipe plugs allow horizontal equalizing piping or integration of bleed/drain valves.
• Modular Electric Switch (2100E)
Can be factory-installed or retrofitted onto existing pneumatic 2100 units.
• Sour Service Ready
Built from materials that meet NACE MR0175-2002, suitable for use with sour gas or corrosive fluids.
Technical SpecificationsArea Classification:
• 2100: Group II Category 2 (Gas and Dust)
• 2100E: Explosion Proof, Flame Proof, Dust Ignition Proof
Certifications:
• 2100: PED, CUTR, ATEX
• 2100E: CSA, FM, ATEX, IECEx, UL, CUTR, PED
Signal & Power:
• Input Signal (2100E): Wired electric, 125/250 VAC or 28 VDC
Max Outlet Pressure:
• 2100: 150 psi
• 2100E: 11A, 1/4 HP at 125/250VAC; 5A resistive at 28VDC
Installation Type:
• Vessel-mounted (external cage)
Operating Conditions:
• Standard temperature ranges
• Suitable for air or natural gas as supply media
Why Choose Fisher™ 2100/2100E?These
level switches deliver dependable performance in demanding industrial environments. Whether you need a pneumatic or electric solution, the 2100 series offers proven reliability, flexible mounting, and long-term value.
For selection assistance, custom configurations, or pricing information, contact your local
Emerson business partner or authorized representative in Thailand.
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