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228 Series
LIQ-PDS-228
Rosemount™ 228
Toroidal Conductivity Sensor
Product Data Sheet
July 2017
A Versatile Conductivity Sensor for Solving Diverse Application Challenges
Rosemount 228 toroidal conductivity sensors reliably measure conductivity in highly conductive electrolyte solutions up to 2 S/cm
(2,000,000 µS/cm). These sensors work in dirty and corrosive applications where metal electrode sensors would otherwise fail. A
robust sensor design makes the Rosemount 228 ideal for measuring concentrations of acid, base, and salt solutions.
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July 2017228 Series
High Performance and Reliability
J Meet challenging application requirements with a selection
of chemical resistant body options including PEEK and Tefzel
J High vibration tolerance with reinforced internal metal frame
design
J High temperature option for process temperatures up to
392 °F (200 °C) and suitable for use under high pressure up to
295 psig (2135 kPa [abs])
Meet Your Process Mounting Needs
J Suitable for insertion and submersion type applications
J Versatile mounting options featuring either a 3/4 in. MNPT or
5/8 in. 11 UNC process connection
J Eliminate the need to shut down your process when
removing sensors from piping and tanks by using an optional
retraction assembly kit
Contents
Ordering Information........ ................................................................................................................................................................3
Specications........ ............................................................................................................................................................................4
Dimensional Drawings........ ...............................................................................................................................................................6
Accessories........................................................................................................................................................................................9
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July 2017 228 Series
Ordering Information
Rosemount 228 Toroidal Conductivity Sensors are molded of chemically resistant glass-
lled PEEK or Tefzel and are ideal for measuring concentrations of acid, base, and salt
solutions. The sensors include an integral PT-100 RTD for temperature compensation
and an integral cable length of 20 ft. The Rosemount 228 can be used with a variety of
insertion mounting adapters to meet your installation requirements (see Accessories).
Rosemount 228
Toroidal Conductivity Sensor
Table 1 -Rosemount 228 Toroidal Conductivity Sensor Ordering Information
Model Sensor type
228 Toroidal Conductivity Sensor
Materials of construction
02 Glass-lled PEEK (standard temperature)
03 Glass-lled PEEK (high temperature)
04 Glass lled Tefzel
09 Unlled Tefzel
Process connection
20 5/8 in. 11 UNC
21 3/4 in. MNPT
Cable type
5
54 Unshielded cable
56 EMI/RFI shielded cable
Cable length
61 20 ft (6.1 m)
62 18 in. (457 mm)
Typical model number: 228-03-21-51-61
(1) Not available with options -50-62 and -54-62
(2) Not available with option -54-62
(3) This option requires a mounting adapter. This option comes standard with an EPDM gasket (Viton and Kalrez gaskets are also available; see Accessories).
(4) Not available with option -62.
(5) Cables may be extended using the remote junction box PN 23550-00 (sold separately) and extension cables (see Accessories).
(6) Recommended for use with transmitter models 1054 and 2054. May be used with transmitter models 1055, 1056, 1066, 54C, 54eC, 81T, 2081T, 3081T, 4081T,
5081T, and XMT, but not recommended.
(7) Recommended for use with transmitter models 1055, 1056, 1066, 56, 54C, 54eC, 5081, and XMT.
(8) For use with option -54 only. Connects sensor used in valve insertion assembly to junction box. Requires interconnecting cable to connect junction box to transmitter.
Use either cable 23294-00 (unshielded) or 23294-05 (shielded).
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July 2017228 Series
Specifications
Sensor Specifications
Wetted materials: Body materials either glass-lled PEEK, glass-lled Tefzel, or unlled Tefzel. Option-20 has EPDM gasket.
Process connection: -20: 5/8 in. 11 UNC
-21 : 3/4 in. MNPT
Cable length: 20 ft (6.1 m)
Maximum cable length: 200 ft (61 m)
Weight/shipping weight: 2 lb/3 lb (1.0 kg/1.5 kg)
Table 2 - Maximum Operating Temperature and Pressure
Body material option Maximum temperature Maximum pressure Maximum pressure (for CRN registration only)
-02 248 °F (120 °C) 295 psig (2135 kPa) 220 psig (1618 kPa [abs])
-03 392 °F (200 °C) 295 psig (2135 kPa) 220 psig (1618 kPa [abs])
-04 248 °F (120 °C) 200 psig (1480 kPa) 150 psig (1135 kPa [abs])
-05 248 °F (120 °C) 200 psig (1480 kPa) 150 psig (1135 kPa [abs])
Insertion Adapter Specifications
Adapter part
number
23242-02 For use with
23242-03 For use with
2001990 For use with
Sensor
compatibility
option -21
option -20
option -21
Process
connection
1-1/2 in.
MNPT
1-1/2 in.
MNPT
2 in. MNPT CPVC, Viton 100 °F (38 °C) 100 psig
Wetted
materials
316 SS, glass-
lled PEEK,
Viton
316 SS, glass-
lled PEEK,
Viton
Maximum
temperature
392 °F
(200 °C)
392 °F
(200 °C)
185 °F (85 °C) 45 psig
Maximum
pressure
295 psig
(2135 kPa)
295 psig
(2135 kPa)
(791 kPa
[abs])
(412 kPa
[abs])
Maximum
pressure
(for CRN
registration
only)
220 psig
(1618 kPa)
220 psig
(1618 kPa)
N/A 1 lb/2 lb
Weight/
shipping
weight
3 lb/4 lb
(1.5 kg/
2.0 kg)
3 lb/4 lb
(1.5 kg/
2.0 kg)
(0.5 kg/
1.0 kg)
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July 2017 228 Series
Retraction Assembly Specifications
Sensor compatibility: The retraction assemblies are used with 228 - [ ]-20-54-62 only
Wetted materials: 316 stainless steel, ethylene polypropylene (EP), unlled Teon, carbon-lled Teon
Process connection: 1-1/2 in. MNPT
Maximum temperature: 392 °F (200 °C)
Maximum pressure: 295 psig (2135 kPa [abs])
Table 3 - Maximum Retraction/Insertion Conditions
Description Temperature Pressure Maximum insertion travel Weight/shipping weight
23311-00,
mechanical
retraction assembly
23311-01, manual
retraction assembly
392 °F (200 °C) 295 psig (2135 kPa [abs]) 10.5 in. (267 mm) 12 lb/15 lb (5.5 kg/7.0 kg)
266 °F (130 °C) 35 psig (343 kPa [abs]) 12.0 in. (305 mm) 9 lb/12 lb (4.5 kg/5.5 kg)
Ball Valve Specifications (Sold Separately)
Part number: 9340065
Wetted materials: 316 stainless steel, Teon TFE
Process connection: 1-1/2 in. FNPT
Weight/shipping weight: 4 lb/5 lb (2.0 kg/2.5 kg)
Pressure and temperature:
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Dimensional Drawings
Figure 1. Rosemount 228 dimensional drawing
July 2017228 Series
Figure 2. Insertion Adapter 23242-02
Figure 3. Insertion Adapter 23242-03 Figure 4. Insertion Adapter
2001990
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July 2017 228 Series
Figure 5. Manual Retraction Assembly PN 23311-01 dimensional drawing
Millimeter
Inch
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Figure 6. Mechanical Retraction Assembly PN 23311-00 dimensional drawing
Millimeter
Inch
July 2017228 Series
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July 2017 228 Series
Accessories
Part number Description
23550-00 Remote junction box
23294-00 Unshielded interconnecting cable
23294-05 Shielded interconnecting cable
23311-00 Mechanical valve insertion assembly
23311-01 Manual valve insertion assembly
2001990 Mounting adapter, 2 in. MNPT, CPVC
9550179 O-ring, EP rubber, for 2001990
23242-02 Mounting adapter, 1-1/2 in. MNPT insertion, 1 in. FNPT conduit connection, PEEK
33081-00-99SQ7091A Adapter insert, Tefzel, for 23242-02
33081-00 Adapter insert, PEEK, for 23242-02
23242-03 Mounting adapter, 1-1/2 in. MNPT insertion, 3/4 in. FNPT conduit connection, PEEK
33080-01-99SQ7182 Adapter insert, Tefzel, for 23242-03
23277-01 Mounting adapter, Foxboro, PEEK, 5/8 11 UNC
23277-01-99SQ7182 Mounting adapter, Foxboro, Tefzel, 5/8 11 UNC
33075-00 Viton gasket for option 20
33075-03 Kalrez gasket for option 20
9200276 Extension cable, unprepped
9340065 1-1/2 in. FNPT full port ball valve for use with retraction assemblies
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Notes
July 2017228 Series
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July 2017 228 Series
Notes
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228 Series
LIQ-PDS-228
Product Data Sheet
July 2017
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