Specifications; General; Mechanical; Functional - Emerson Rosemount 2120 Reference Manual

Reference Manual
00809-0100-4030, Rev FA
Appendix A
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 35
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 39
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 46

A.1 Specifications

A.1.1 General
Product
Rosemount 2120 Level Switch
Measuring principle
Vibrating fork technology
Applications
Most liquids including coating liquids, aerated liquids, and slurries.
A.1.2 Mechanical
Housing / Enclosure
Table A-1. Housing/Enclosure Specifications
Housing code A
Nylon PA66
Housing material
30%GF
Rotational Yes
Not
Housing paint
applicable
LED window Nylon PA12
1
Conduit entry M20
ANPT
Ingress IP66/67 to
protection EN60529
Connections
Threaded, Tri Clamp, and flanged process connections.
See "Process connection size / type" on page 46
Extended lengths
Table A-2. Minimum Extended Lengths
Process connection
3 / –in. threaded
4
1–in. threaded
Flanged
Tri Clamp
Specifications and Reference Data
Specifications and Reference Data
D X Y S
Al alloy ASTM
316C12 SST
B85 A360.0
No
Polyurethane Not
paint applicable
None None
/ -in. 3 / -in.
2 4
M20 M20
ANPT
IP66/67 to IP66/67 to
EN60529, EN60529,
®
NEMA 4X NEMA 4X
for a full list.
Minimum extended length
3.8 in. (95 mm)
3.7 in. (94 mm)
3.5 in. (89 mm)
4.1 in. (105 mm)
The maximum extended length is 157.5 in. (4000 mm) except for
ECTFE copolymer coating and mechanically-polished process
connection options which have a maximum length of 59.1 in.
(1500 mm) and 39.4 in. (1000 mm) respectively.
Material selection
Emerson provides a variety of Rosemount product with various
product options and configurations including materials of
construction that can be expected to perform well in a wide range
of applications. The Rosemount product information presented is
intended as a guide for the purchaser to make an appropriate
selection for the application. It is the purchaser's sole
responsibility to make a careful analysis of all process parameters
(such as all chemical components, temperature, pressure, flow
rate, abrasives, contaminants, etc.), when specifying product,
materials, options and components for the particular application.
Emerson is not in a position to evaluate or guarantee the
T
compatibility of the process fluid or other process parameters with
the product, options, configuration or materials of construction
selected.
No
Process connection materials
316/316L stainless steel (1.4401/1.4404 dual certified).
Alloy C (UNS N10002) and Alloy C-276 (UNS N10276)
3 / -in.
4
– available for flanged, and BSPT and NPT threaded process
ANPT
connections (
ECTFE co-polymer coated 316/316L Stainless Steel
(1.4401/1.4404 dual certified) – only available for a flanged
Rosemount 2120 but excludes 1-in./DN25/25A flanges.
Gasket material for
Grade X carbon fiber with rubber binder.
A.1.3 Functional
Maximum operating altitude
6562 ft. (2000 m)
Maximum operating pressure
The final rating depends on the selected process connection.
Threaded connection: see

pressures
Specifications and Reference Data
/ - and 1-in. BSPT (R), and
3 3
4
/ - and 1-in. BSPP (G) is non-asbestos BS7531
3
4
Figure A-1 on page 36
December 2016
/ - and 1-in. NPT).
4
for operating
35