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Rosemount™ 404
Contacting Conductivity Sensors
Product Data Sheet
June 2017
LIQ-PDS-404
Reliable conductivity measurements for your process
With the Rosemount 404 Contacting Conductivity Sensors, you will be able to accurately measure electrolytic conductivity in a broad
range of applications from high purity water to clean cooling water. The Rosemount 404 contacting conductivity sensors are ideal for
use in clean, non-corrosive liquid having conductivity less than 2,000 μS/cm and where process conductivity and temperature
changes quickly.
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Rosemount 404 Contacting Conductivity Sensors
Overview
June 2017
Minimize Start-up and Installation Time
A factory-measured cell constant ensures out-of-the-box
accuracy and no initial calibration requirements.
Available in cell constants of 0.01 and 0.1/cm.
A Robust Sensor Design
The sensors have concentric titanium electrodes separated by
a PEEK insulator.
An EPDM O-ring seals the internal parts of the sensor from the
process liquid.
Meet process compatibility requirements with a choice of
either a PVC or Stainless Steel body.
Maximum operating temperature up to 100 °C.
Maximum pressure rating up to 100 psig.
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Engineering Specifications . . . . . . . . . . . . . . . . . . . . . . . . .7
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June 2017
Rosemount 404 Contacting Conductivity Sensors
Ordering Information
The Rosemount 404 Contacting Conductivity sensor features an integrated flow cell
design. The flow through sensor design has a small holdup volume allowing for rapid
response to sudden changes in process conductivity and temperature. The sensor must
be used in a sidestream sample. Rosemount 404 sensors are available with either a PVC
or stainless steel body. The stainless steel version can be disassembled for cleaning,
whereas the PVC version cannot be taken apart.
Additional Information
Specifications: see “Specifications” on page 4
Dimensional drawings: see “Dimensional Drawings” on page 5
Accessories: see “Accessories” on page 6
Engineering Specifications: see “Engineering Specifications” on page 7
Table 1. Rosemount 404 Contacting Conductivity Sensor ordering information
Model Sensor type
404 Contacting Conductivity Sensor
Cell constant
11 0.01/cm
12 0.1/cm
Flow cell type
16 PVC
17 Stainless Steel
Temperature Compensation
_ Pt-1000
54 Pt-100
(1)
Options
_ No selection
50 Extended Integral Cable Length (50 ft; 15 m)
Typical Model Number: 404-12-17_-50
1. Recommended for use with Rosemount transmitters 1056, 56, 1057, 1066, and 5081.
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Rosemount 404 Contacting Conductivity Sensors
Specifications
Table 2. Rosemount 404 Contacting Conductivity Sensor specifications
Wetted materials
Electrodes Titanium
Insulator Glass Filled PEEK
Body
O-ring EPDM
Fittings
Temperature range
Option -16 32 to 140 °F (0 to 60 °C)
Option -17 32 to 212 °F (0 to 100 °C)
Pressure
Option -16: PVC
Option -17: 303 Stainless Steel
Option -16: Polyethylene
Option -17: 316 Stainless Steel
June 2017
Option -16 100 psig (791 kPa abs) at 77 °F (25 °C); 20 psig (239 kPa abs) at 140 °F (60 °C)
Option -17 100 psig (791 kPa abs) maximum
Process connection
Option -16 3/8 in. barbed tubing connector
Option -17
Compression fitting for 3/8 in. OD tubing. Fittings can be removed to leave ¼ in. FNPT
ports.
Cell constants
0.01 and 0.1/cm
Cable length
10 ft (3.1 m) standard; 50 ft (15.2 m) optional
Table 3. Rosemount 404 weights and shipping weights*
With 10 ft. (3.1 m) cable With 50 ft. (15.2 m) cable
Model
Weight Shipping Weight Weight Shipping Weight
Rosemount 404-16 2 lb. (1.0 kg) 3 lb. (1.5 kg) 4 lb. (2.0 kg) 5 lb. (2.5 kg)
Rosemount 404-17 4 lb. (2.0 kg) 5 lb. (2.5 kg) 6 lb. (3.0 kg) 7 lb. (3.5 kg)
* Rounded up to the nearest 1 lb or 0.5 kg.
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June 2017
Dimensional Drawings
Figure 1. Rosemount 404 dimensional drawing
Rosemount 404 Contacting Conductivity Sensors
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Rosemount 404 Contacting Conductivity Sensors
Accessories
Table 4. Rosemount 404 Contacting Conductivity Sensor accessories information
Part number Description
23550-00 Remote junction box without preamplifier
23747-00 Interconnect cable, prepped (must specify length)
9200275 Extension cable, unprepped (must specify length)
05010781899 Conductivity standard SS-6, 200 μS/cm, 32 oz (0.95 L)
05010797875 Conductivity standard SS-6A, 200 μS/cm, 1 gal (3.78 L)
05010782468 Conductivity standard SS-5, 100k0 μS/cm, 32 oz (0.95 L)
05010783002 Conductivity standard SS-5A, 1000 μS/cm, 1 gal (3.78 L)
05000705464 Conductivity standard SS-1, 1409 μS/cm, 32 oz (0.95 L)
05000709672 Conductivity standard SS-1A, 1409 μS/cm, 1 gal (3.78 L)
9210004 Conductivity standard, 2000 μS/cm, 16 oz
June 2017
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June 2017
Rosemount 404 Contacting Conductivity Sensors
Engineering Specifications
Cell constants 0.01, 0.1, and 1.0/cm
The sensor shall be suitable for the determination of electrolytic conductivity in clean, noncorrosive sidestream samples where
rapid response to changes in conductivity or temperature is needed.
The sensor shall incorporate titanium electrodes and a PEEK insulator.
The sensor shall have an integral platinum RTD for temperature measurement.
The sensor shall be available with either a PVC or stainless steel body flow cell.
The PVC body sensor shall have 3/8-in. barbed tubing connectors.
The stainless steel body sensor shall have compression fittings for 3/8-in. OD tubing. The compression fittings shall be removable
to leave ¼-in. FNPT ports.
The maximum temperature for the PVC body sensor shall be 140 °F (60 °C) at 20 psig (239 kPa abs).
The maximum temperature for the stainless steel body sensor shall be 212 °F (100 °C) at 100 psig (791 kPa abs).
The sensor shall be Rosemount 404 or approved equal.
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Rosemount 404 Contacting Conductivity Sensors
LIQ-PDS-404
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Product Data Sheet
June 2017
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