Rosemount 2120 Vibrating Fork Liquid Level Switch
Universal package to suit virtually all liquid applications
The Rosemount 2120 is based on vibrating short fork technology, making it suitable for virtually all liquid applications. Features include a complete range of process connections, wide choice of housing and wetted parts materials, four different switching functions, extended fork lengths, hazardous area, basic self-checking functionality, and overfill approvals. The 2120 can withstand temperatures up to 302 °F (150 °C) and pressures to 1450 psig (100 barg). This combination of features makes it configurable to almost all requirements.
Function virtually unaffected by flow, turbulence, bubbles, foam, vibration, solids content, coating, properties of the liquid, and product variations
No need for calibration and requires minimum installation procedures
Easy terminal access, polarity insensitive and short circuit protection
No moving parts or crevices means virtually no maintenance
Basic electronic self-checking functionality
Visible Heartbeat LED shows device status
Adjustable Switching Delay for turbulent ⁄ splashing applications
Local Magnetic Test Point makes functional test easy
Small in size and weight, short fork length up to 118-in. (3 m)
"Fast Drip" Fork Design gives quicker response time especially with viscous liquids
General area, Explosion ⁄ Flameproof, and Intrinsically Safe options
Features & Benefits
The fully featured 2120 is ideal for almost all liquid applications
Wide choice of materials of construction
Complete range of process connections
Four switching mechanisms configurable for your application
Electronic self-checking and condition monitoring
Mode select ⁄ user adjustable time delay switch
SIL 2 suitable
Specifications
| Key Specifications | |
| Approvals | |
| Certification | Explosion proof certification, Intrinsically Safe, Ordinary Location, No hazardous area certification, Overfill Protection (DIBt ⁄ WHG), and SIL2 |
| Construction | |
| Housing | Plastic, Stainless steel, or Aluminum |
| Wetted Material | 316L stainless steel (1.4404), ECTFE/PFA copolymer (coated 316L SST), or Corrosion Resistant Nickel Alloy C |
| IP Rating | IP66 ⁄ 67 to Type 4X |
| Connections | |
| Process Connection | Threaded, Flanged, or Hygienic |
| Electrical | |
| Electrical Connection | Terminal Block |
| Output | Direct load switching (ac or dc) DPDT Relay output PNP for Programmable Logic Controllers Self-check, condition monitoring |
| Operating Conditions | |
| Process | -40 to 302 °F (-40 to 150 °C) |
| Temperature | |
| Process Pressure | 1450 psi at 122 °F (100 barg at 50 °C) |
Applications
Applications for the Rosemount 2120 Vibrating Fork Liquid Level Switch
Rosemount 2120 can be used for point level measurements on liquids in most processes and most industries. Applications include:
Overfill protection
High and low level alarm
Pump control ⁄ limit detection
Pipe installation (pump protection)
Hygienic applications
Wireless applications (when used in conjunction with The Rosemount 702)
Vessel leak detection
Water ingress detection