Rosemount Analytical 242 Specifications

Product Data Sheet

Model 242

LIQ-PDS-242
June 2017

Flow Through Toroidal C onductivity Sensor

•

FLOW THROUGH DESIGN is ideal for use with viscous,
abrasive, or fibrous process liquids.

• OVER 250 CONFIGURATIONS to meet customers' needs.

• REPLACEABLE LINER in glass-filled PEEK, TEFLON, or
ALUMINA reduces long-term operating costs.

•

DIN and ANSI FLANGES compatible with all piping instal­lations.

•

LINE SIZES of 1 through 4 inches (DN 25, 40, 50, 80 and

100).

• IN-LINE CALIBRATION saves money by reducing labor
and down-time.

• TEMPERATURE SENSOR and JUNCTION-BOX included.

FE AT URE S AND APPL ICAT IONS

Rosemount Analytical Toroidal Conductivity Sensors
are ideal for use in processes where contacting sen­sors -- those with electr odes exposed to th e m easur ed
solution -- would corrode or become fouled.

The Model 242 Flow Through Toroidal conductivity
sensor consists of two toroids surrounding a pipe
through which the proc ess liqu id flo ws. O ne t or oi d acts
as a transmitter and the other as a receiver.
Energizing the transmitter toroid induces an electric
current in the proc ess solution which induces a n elec­tric current in t he receiver toroid. The strengt h of the
induced current is direct ly proportional to the conduc­tivity of the solution.

The Model 242 sensor is available in over two hun­dred fifty configurations to meet the needs of many
applications and installations. Line sizes of 1, 1.5, 2, 3,
and 4 inches (25, 40, 50, 80, and 1 00 mm) are avail­able with both ANSI and DIN compatible flanges. A
variety of liner m aterials and O-rings are available to
ensure compatibility with most process liquids.

The Model 242 sensor is e asy to install. It fits in th e
process piping between mounting flanges. Special
grounding rings are not needed because the senso r
has contact rings built into it. Recessed bolts hold the
sensor together to ensure all internal parts stay in
perfect alignment. A junction box and a Pt 100 RTD
are included. The RTD slips easily into one of the
sensor contact rings. There is no need to install a
separate thermowell, and temperature measure­ments are made at th e sam e point as the con ductivi­ty measurements.

The Model 242 is n ot sensitive to flow r ate or direc­tion. It does not obstruc t the process flow. The sen­sor is rugged and constructed from chemically
resistant materials. All these features m ake the sen­sor ideal for applications in mining and metals pro­cessing, pulp and paper processing, and the
chemical processing industry.

The Model 242 Flo w Through C onductivit y Sensor is
compatible with instrument Models 54eC, 1055,
3081T, 4081T, 5081-T, and Xmt-T.

SPECIFICATIONS

Installation Type

Flow Through

Conductivity Range

Process Connections

Maximum Temperature

Maximum Pressure

Wetted Materials:

O-rings

Shipping Weight

The Model 242 Flow Through Sensor comprises a toroid
housing constructed from 316 stainless steel and polyeth­yleneterephthalate, process connection flanges of 316
stainless steel, two metal c ontact rings (available in choice
of three materials), an insulating liner (choice of three
materials), O-rings (choice of three materials), a Pt 100
RTD, and a sensor-mounted junction box. Only the liner,
contact rings, and O-rings are wetted b y the process. The
Pt 100 RTD is designed for insertion into one pre-drilled
contact ring. The NEMA 7D junction box is constructed of
heavy duty epoxy-painted cast aluminum . The conductivity
range is user-selectable with the tappe d toroid windings. In­line calibration can be perform ed with resistors connect- ed
to an integral wire around the toroids that is terminated in
the junction box.

Liners are available in T eflon, glass-filled Polyetheretherk etone (PEEK), and alumina. These mater ials provide
excellent chem ical resistance. P EEK is recom mended for high pressure or high tem perature appl ications. Tef lon
is recommended when the process solution contains hydrofluoric acid or other strong oxidizing agents. Alumina is
recommended if the process solution is abrasive, such as in alumina/caustic ratio applications.

Pt 100 RTD

Flange

Contact Ring

Liner

O-ring (not visible)

Teflon is a registered trademark of E.I. du Pont de Nemours & Co.
Viton is a registered trademark of Du Pont Dow Elastomers.
Carpenter 20Cb-3 is a registered trademark of Carpenter Technologies.
Hastelloy is a registered trademark of Haynes International.
Chemraz is a registered trademark of Greene, Tweed, & Co.

2

Liner

Contact Rings

100 μS/cm to 2 S/cm
150# ANSI, 300# ANSI, PN16 DIN 2501 compatible flanges
Depends on configuration. For plastic-lined sensors, see charts on facing page.

For alumina-lined sensors, see charts on page 4.
Depends on configuration. For plastic-lined sensors, see charts on facing page.

For alumina-lined sensors, see charts on page 4.
Teflon® (PTFE), glass-filled PEEK, or alumina

316 SST, Carpenter 20Cb-3
EPDM, Viton

1” to 2”: 22 lbs. (10kg)
3” to 4”: 86 lbs. (39 kg)

®

(FKM), or Chemraz® (FFKM)

®

SST, or Hastelloy® C-276

Pressure - Temperature Specifications for 1”, 1.5”, and 2” (25, 40, and 50 mm) Sensors:

Models 242-02, 242-03, and 242-04

Pressure - Temperature Specifications for 3” and 4” (80 and 100 mm) Sensors:

Models 242-06 and 242-08

3

Pressure - Temperature Specifications for 1” and 2” Sensors: Alumina Liner

4

Pressure - Temperature Specifications for 3” and 4” Sensors: Alumina Liner

DIMENSIONAL DRAWING

The dimensions of the Model 242 sensor depend on the selected line size and the flange option. Please refer to
the dimensional drawing for the appropriate sensor dimensions.

5

ORDERING INFORMATION

MODEL

242

FLOW THROUGH TOROIDAL CONDUCTIVITY SENSOR

CODE

LINE SIZE (Required Selection)

02

1”

DN 25 03

1-1/2”

DN 40 04

2”

DN 50 06

3”

DN 80

(no ATEX approval with 5081T)

08

4”

DN 100

(no ATEX approval with 5081T)

CODE

PROCESS CONNECTION (Required Selection)

10

150# ANSI Flange (Line sizes 1", 1-1/2", 2”, 3”, 4”)

11

300# ANSI Flange (Line sizes 1", 1-1/2", 2”, 3”, 4”)

14

PN 16 Metric Flange (Line sizes DN 25, 40, 50, 80, 100)

CODE

CONTACT RING MATERIAL (Required Selection)

SS

316 Stainless Steel

H4

Hastelloy C-276 (Line Sizes 1", 1-1/2", 2”, 25mm, 40mm, 50mm)

H8

Hastelloy C-276 (Line Sizes 3", 4", 80mm, 100mm)

C4

Carpenter 20-Cb3 (Line Sizes 1", 1-1/2", 2”, 25mm, 40mm, 50mm)

C8

Carpenter 20-Cb3 (Line Sizes 3", 4", 80mm, 100mm)

CODE

LINER MATERIAL (Required Selection)

TE

PTFE (Teflon®)

G4

PEEK, 30% Glass-Filled (Line Sizes 1", 1-1/2", 2”, 25mm, 40mm, 50mm)

G8

PEEK, 30% Glass-Filled (Line Sizes 3", 4", 80mm, 100mm)

A4

Alumina (Line sizes 1”, 2”, 25 mm, 50 mm); available only with option F4

A8

Alumina (Line sizes 3”, 4”, 80 mm, 100 mm); available only with option F8

CODE

PROCESS O-RING MATERIAL (Required Selection)

EP

Ethylene Propylene Rubber

VT

Fluorocarbon Rubber (Viton

)

F4

High Temp. Perfluoroelastomer (Chemraz

)

(Line Sizes 1", 1-1/2", 2”, 25mm, 40mm, 50mm)

The Model 242 Flow -Through Sensor is configurable to meet the needs of many applicat ions and instal lations
(both ANSI and DIN). After specifying line size and flange t ype, the custom er selects the wetted m aterials most
compatible with the pr ocess stream. A NEMA 7D jun ction box and Pt 100 RTD are a lso included. Compatible
instruments include Rosemount Models 54eC, 1055, 3081T, 4081T, 5081-T, and Xmt-T.

The extension cable requ ired for wiring from the junction box to th e instrument m ust be ordered separatel y. The
customer supplies the gaskets, mating flanges, and flange bolts.

F8

242 -0611SSG8VT EXAMPLE

High Temp. Perfluoroelastomer (Chemraz

®

®
®

) (Line Sizes 3", 4",

80mm, 100mm

)

6

ACCESSORIES

PART NUMBER

DESCRIPTION

4081T, 5081-T, and Xmt-T (Specify length)

KIT PN

DESCRIPTION

FOR SENSOR MODELS

24005-00

Kit, Liner, 1” DN 25, Teflon PTFE

242-02[ ]TE[ ]

24005-01

Kit, Liner, 1” DN 25, glass-filled PEEK

242-02[ ]G4[ ]

24005-02

Kit, Liner, 1” DN 25, Alumina

242-02[ ]A4[ ]

24006-00

Kit, Liner, 1-1/2” DN 40, Teflon PTFE

242-03[ ]TE[ ]

24006-01

Kit, Liner, 1-1/2” DN 40, glass-filled PEEK

242-03[ ]G4[ ]

24007-00

Kit, Liner, 2” DN 50, Teflon PTFE

242-04[ ]TE[ ]

24007-01

Kit, Liner, 2” DN 50, glass-filled PEEK

242-04[ ]G4[ ]

24007-02

Kit, Liner, 2” DN 50, Alumina

242-04[ ]A4[ ]

24008-00

Kit, Liner, 3” DN 80, Teflon PTFE

242-06[ ]TE[ ]

24008-01

Kit, Liner, 3” DN 80, glass-filled PEEK

242-06[ ]G8[ ]

24008-02

Kit, Liner, 3” DN 80, Alumina

242-06[ ]A8[ ]

24009-00

Kit, Liner, 4” DN 100, Teflon PTFE

242-08[ ]TE[ ]

24009-01

Kit, Liner, 4” DN 100, glass-filled PEE K

242-08[ ]G8[ ]

24009-02

Kit, Liner, 4” DN 100, Alumina

242-08[ ]A8[ ]

KIT PN

DESCRIPTION

FOR SENSOR MODELS

24010-00

Kit, O-Ring, 1” DN 25, EPDM

242-02[ ]EP[ ]

24010-01

Kit, O-Ring, 1” DN 25, Viton

242-02[ ]VT[ ]

24010-02

Kit, O-Ring, 1” DN 25, Chemraz

242-02[ ]F4[ ]

24010-03

Kit, O-Ring, 1” DN 25, Chemraz for use with Alumina liner

242-02[ ]A4-F4

24011-00

Kit, O-Ring, 1-1/2” DN 40, EPDM

242-03[ ]EP[ ]

24011-01

Kit, O-Ring, 1-1/2” DN 40, Viton

242-03[ ]VT[ ]

24011-02

Kit, O-Ring, 1-1/2” DN 40, Chemraz

242-03[ ]F4[ ]

24012-00

Kit, O-Ring, 2” DN 50, EPDM

242-04[ ]EP[ ]

24012-01

Kit, O-Ring, 2” DN 50, Viton

242-04[ ]VT[ ]

24012-02

Kit, O-Ring, 2” DN 50, Chemraz

242-04[ ]F4[ ]

24012-03

Kit, O-Ring, 2” DN 50, Chemraz for use with Alumina liner

242-04[ ]A4-F4

24013-00

Kit, O-Ring, 3” DN 80, EPDM

242-06[ ]EP[ ]

24013-01

Kit, O-Ring, 3” DN 80, Viton

242-06[ ]VT[ ]

24013-02

Kit, O-Ring, 3” DN 80, Chemraz

242-06[ ]F8[ ]

24013-03

Kit, O-Ring, 3” DN 80, Chemraz for use with Alumina liner

242-06[ ]A8-F8

24014-00

Kit, O-Ring, 4” DN 100, EPDM

242-08[ ]EP[ ]

24014-01

Kit, O-Ring, 4” DN 100, Viton

242-08[ ]VT[ ]

24014-02

Kit, O-Ring, 4” DN 100, Chemraz

242-08[ ]F8[ ]

23909-00 Extension cable, Pre-prepped, for connection to Instrument Models 54eC, 1055, 3081T,

24014-03 Kit, O-Ring, 4” DN 100, Chemraz for use with Alumina liner 242-08[ ]A8-F8

7

* REPLACEMENT PARTS AVAILABLE.

EXPLODED VIEW OF MODEL 242

Notes:

7www.Emerson.com/RosemountLiquidAnalysis

Rosemount 242 Sensor

LIQ-PDS-242

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1

Product Data Sheet

June 2017

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