Rosemount 2120 Full-Featured Vibrating Fork Liquid Level Switch
Product Description
Rosemount™ 2120 Level Switch - Vibrating Fork
The Rosemount 2120 Level Switch provides easy to install, reliable level detection and control. 3rd party IEC61508 (SIL2) safety and hygienic certification with choice of outputs makes it suitable for a wide range of applications. It has no moving parts, needs no calibration and is virtually unaffected by process conditions. Adjustable switching delay prevents false switching in turbulent applications. Understand what is going on with your process- the visible heartbeat LED provides device status and health, and magnetic test point provides an easy-to-use functional test.
The Rosemount 2120 Level Switch provides easy to install, reliable level detection and control. 3rd party IEC61508 (SIL2) safety and hygienic certification with choice of outputs makes it suitable for a wide range of applications. It has no moving parts, needs no calibration and is virtually unaffected by process conditions. Adjustable switching delay prevents false switching in turbulent applications. Understand what is going on with your process- the visible heartbeat LED provides device status and health, and magnetic test point provides an easy-to-use functional test.
The Rosemount 2120 is a liquid point level switch based on the vibrating short fork technology making it suitable for virtually all liquid applications. Complete range of process connections, wide choice of housing and wetted parts materials, four different switching functions, extended fork lengths, hazardous area and overfill approvals make it configurable to almost all requirements.
Features
Magnetic test point makes testing of the Rosemount 2120 easy
Can be operated using the sun or battery as a power source with the 12Vdc option
Fast drip fork design gives a quicker response time, especially with viscous liquids
Adjustable switching delay enables easy handling of turbulent and splashing applications
3-A and EHEDG certificates for hygienic applications. Compliance with FDA and ASME-BPE standards
Features
Magnetic test point makes testing of the Rosemount 2120 easy
Can be operated using the sun or battery as a power source with the 12Vdc option
Fast drip fork design gives a quicker response time, especially with viscous liquids
Adjustable switching delay enables easy handling of turbulent and splashing applications
3-A and EHEDG certificates for hygienic applications. Compliance with FDA and ASME-BPE standards
• Function virtually unaffected by flow, bubbles, turbulence, 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
• Electronic, self-checking and condition monitoring - Heartbeat LED gives status and health information
• Adjustable Switching Delay for turbulent/splashing applications
• Magnetic test point makes functional test easy
• Small in size and weight
• "Fast Drip" Fork Design gives quicker response time especially with viscous liquids
• Explosion/Flameproof and Intrinsically Safe options
• SIL 2 of IEC 61508 • DIBt/WHG overfill protection
• 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
• Electronic, self-checking and condition monitoring - Heartbeat LED gives status and health information
• Adjustable Switching Delay for turbulent/splashing applications
• Magnetic test point makes functional test easy
• Small in size and weight
• "Fast Drip" Fork Design gives quicker response time especially with viscous liquids
• Explosion/Flameproof and Intrinsically Safe options
• SIL 2 of IEC 61508 • DIBt/WHG overfill protection
MEASUREMENT PRINCIPLE
The Rosemount 2120 is a liquid point level switch designed using the principle of a tuning fork. A piezo-electric crystal is used to oscillate the forks at their natural frequency. Changes to this frequency are continuously monitored. When the 2120 is used as a low alarm, the liquid in the vessel drains down past the fork, resulting in a change of natural frequency; this is detected by the electronics which switch the output state. When used as a high alarm, the liquid rises in the vessel, makes contact with the fork and again the output switches.
The Rosemount 2120 is a liquid point level switch designed using the principle of a tuning fork. A piezo-electric crystal is used to oscillate the forks at their natural frequency. Changes to this frequency are continuously monitored. When the 2120 is used as a low alarm, the liquid in the vessel drains down past the fork, resulting in a change of natural frequency; this is detected by the electronics which switch the output state. When used as a high alarm, the liquid rises in the vessel, makes contact with the fork and again the output switches.
Key features and benefits
1. Virtually unaffected by turbulence, foam, vibration, solids content, coating products, or liquid properties
2.The 2120 is designed for operation in process temperatures from -40 to 302 °F (-40 to 150 °C)
3. A 'heartbeat' LED indicates its operating state. The LED also flashes when the switch output is 'off' and is constantly lit when 'on'
4.Adjustable switching delay prevents false switching in turbulent or splashing applications
5. 'Fast Drip' fork design gives quicker response time, especially with viscous liquids
6.Rapid wet-to-dry and dry-to-wet time setting for highly responsive switching
7.Fork shape is optimized for hand polishing to meet hygienic requirements
8. No moving parts or crevices for virtually no maintenance
1. Virtually unaffected by turbulence, foam, vibration, solids content, coating products, or liquid properties
2.The 2120 is designed for operation in process temperatures from -40 to 302 °F (-40 to 150 °C)
3. A 'heartbeat' LED indicates its operating state. The LED also flashes when the switch output is 'off' and is constantly lit when 'on'
4.Adjustable switching delay prevents false switching in turbulent or splashing applications
5. 'Fast Drip' fork design gives quicker response time, especially with viscous liquids
6.Rapid wet-to-dry and dry-to-wet time setting for highly responsive switching
7.Fork shape is optimized for hand polishing to meet hygienic requirements
8. No moving parts or crevices for virtually no maintenance
Applications
1.Overfill protection
2.High and low level alarms
3.Pump control or limit detection
4.Run dry or pump protection
5.Hygienic applications
6.High-temperature applications
7.Wireless applications
1.Overfill protection
2.High and low level alarms
3.Pump control or limit detection
4.Run dry or pump protection
5.Hygienic applications
6.High-temperature applications
7.Wireless applications
Product Parameters
| Item name | Rosemount 2120 Vibrating Fork Liquid Level Switch |
| Model | 2120 |
| Material | 316/316L Stainless Steel |
| Communication Protocol | Direct Load, PLC/PNP, Relay, 8/16 mA, NAMUR |
| Process Media Density | Minimum 37.5 lb/ft3 (600 kg/m3) |
| Viscosity | 0.2 to 10000 cP (centiPoise) |
| Operating Pressure | Full vacuum to 1450 psi (Full vacuum to 100 bar) |
| Operating Temperature | -40 to 302 °F (-40 to 150 °C) |
| Safety | SIL2 IEC 61508 certified TÜV tested and WHG approved for overfill prevention |
| Diagnostics | Electronic self-checking and condition monitoring |
