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Rosemount
Rosemount 2120 Liquid Level Switch
Quote on request
No online payment · add lines to RFQ BOM
Vibrating-fork level switch; −40…150 °C; relay/PNP/NAMUR. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Process connection
Threaded ¾–2 in BSPT/BSPP/NPT; Tri Clamp; flanged options
Wetted parts
316/316L SST; Alloy C/C-276; ECTFE-coated options
Approvals
Hazardous area / SIL options per PDS ordering tables
Type
Vibrating fork liquid level switch (Rosemount 2120)
Process Temperature
−40…150 °C (−40…302 °F) depending on model
Switching Point
Water: ~0.5 in (13 mm) from tip/edge; hysteresis ~0.1 in (2.5 mm)
Fits point-level switching where you need a Rosemount 2120 vibrating-fork liquid level switch with −40…150 °C process temperature class and plug-in electronics options.
Key advantages
- Technology — Vibrating fork liquid level switch
- Process T — −40…150 °C (−40…302 °F) depending on model
- Switching — Water ~0.5 in (13 mm) from tip; ~0.1 in hysteresis
- Electronics — Relay, direct load, PNP/PLC, NAMUR, 8/16 mA
- Connections — ¾–2 in threaded; Tri Clamp; flanged options
Typical applications
- High/low liquid level alarms.
- Hygienic Tri Clamp vessels.
- Overfill and dry-run protection.
Selection guide
- Electronics code — Relay vs PNP vs NAMUR
- Connection — Thread vs Tri Clamp vs flange
- Wetted materials — 316/316L vs Alloy C
- Temperature model — Process T band
Common mistakes
- Media incompatible with fork coating.
- Wrong electronics for PLC input.
- Ignoring hysteresis at switching point.
When to RFQ / what to tell us
- Electronics, connection, materials.
- Quantity and ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 25475 |
| Brand | Rosemount / Emerson |
| Model | 2120 |
| Product type | Level Switch |
| Type | Vibrating fork liquid level switch (Rosemount 2120) |
| Process temperature | −40…150 °C (−40…302 °F) depending on model |
| Switching point | Water: ~0.5 in (13 mm) from tip/edge; hysteresis ~0.1 in (2.5 mm) |
| Output | Plug-in electronics: relay, direct load, PNP/PLC, NAMUR, 8/16 mA |
| Process connection | Threaded ¾–2 in BSPT/BSPP/NPT; Tri Clamp; flanged options |
| Wetted materials | 316/316L SST; Alloy C/C-276; ECTFE-coated options |
| Housing | Glass-filled nylon PA66; aluminum alloy; 316 SST; IP66/67 |
Documents
FAQ
Q: Process temperature? A: −40…150 °C depending on model.
Q: Outputs? A: Relay, direct load, PNP/PLC, NAMUR, 8/16 mA options.
Q: What should I send for a quote? A: Electronics/connection/materials, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Process connection | Threaded ¾–2 in BSPT/BSPP/NPT; Tri Clamp; flanged options |
| Wetted parts | 316/316L SST; Alloy C/C-276; ECTFE-coated options |
| Approvals | Hazardous area / SIL options per PDS ordering tables |
| Type | Vibrating fork liquid level switch (Rosemount 2120) |
| Process Temperature | −40…150 °C (−40…302 °F) depending on model |
| Switching Point | Water: ~0.5 in (13 mm) from tip/edge; hysteresis ~0.1 in (2.5 mm) |
| Housing | Glass-filled nylon PA66; aluminum alloy; 316 SST; IP66/67 |
| Fork Length | Extended lengths from ~3.5–4.1 in min to 157.5 in (4000 mm) max |
| Document | Rosemount 2120 PDS 00813-0100-4030 |