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Monochloramine Sensor
LIQ-PDS-499ACL-03
Product Data Sheet
July 2017
Rosemount
TM
499ACL-03
Monochloramine Sensor
A trusted sensor for measuring monochloramine
The RosemountTM 499ACL-03 sensor is designed to measure monochloramine without the need for a sample conditioning system.
These amperometric sensors are ideal for use in drinking water and wastewater applications.
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Rosemount 499ACL-03 Monochloramine Sensor Rosemount 499ACL-03 Monochloramine Sensor
July 2017
Overview
A Simple Sensor Design
Measure monochloramine without having to deal with
messy reagents or expensive sample conditioning
systems.
Integral Pt-100 RTD allows for automatic temperature
compensation.
Operates in samples up to 50 °C (122 °F).
Measures 0 to 15 ppm monochloramine.
Ease of Maintenance and Installation
1 in. MNPT process connections suitable for mounting in a
low flow cell installed in a sidestream sample or directly in
a chlorine contact basin.
Replacing the membrane and electrolyte solution is fast
and easy and requires no special tools or fixtures.
Variopol (VP6) cable connection option, for quick cable-
to-sensor release, eliminates cable twisting.
Contents
Ordering Information ..................................................................................................................................................................... 3
Specifications ................................................................................................................................................................................. 4
Dimensional Drawings ................................................................................................................................................................... 5
Accessories .................................................................................................................................................................................... 7
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July 2017
Ordering Information
Rosemount 499ACL-03 monochloramine sensors
are available with either a 25 ft integral cable or a
Variopol (VP6) quick disconnect connection for use with
VP6 interconnecting cables (sold separately). Three
replacement membrane assemblies, three O-rings, and a
4 oz (125 mL) bottle of electrolyte solution are provided
with each sensor.
Table 1. Rosemount 499ACL-03 Monochloramine ordering information
Model Sensor Type
499ACL Chlorine Sensor
Sensor Type
03 Monochloramine
Transmitter Compatibility
54 For use with Rosemount 1056, 56, 1066, and 5081 transmitters
Options
Cable Options
- No selection - standard 25 ft cable
60 Optimum EMI/RFI protected 25 ft cable
VP Variopol (VP6) cable connection
Typical Model Number: 499A CL-01-54-60
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Rosemount 499ACL-03 Monochloramine Sensor Rosemount 499ACL-03 Monochloramine Sensor
July 2017
Specifications
Table 2. Sensor specifications
Physical characteristics Specifications
Range 0 to 6 ppm (mg/L)
Wetted parts Noryl1, Viton2, silicone, wood, and Zitex3 (PFTE)
Accuracy Accuracy depends on the accuracy of the laboratory method used to calibrate the sensor.
Cathode Gold mesh
Linearity 2% (typ.)
pH range Response is practically independent of pH between pH 7.0 and 10.0. Sensor current at pH 10.0 is within
Interferences Free chlorine and other oxidizing agents
Sample conductivity >10 µS/cm at 25 °C (77 °F)
Response time <30 sec to 90% of final reading at 25 °C (77 °F)
Drift <2% of reading per week
Back pressure 0 psig (101 kPa abs). Sample must drain to atmosphere.
Temperature 0 to 50 °C (32 to 122 °F)
Process connection 1 in. MNPT
Electrolyte volume 25 mL (approx.)
Electrolyte life 3 months (approx.)
Cable length (standard integral cable) 25 ft (7.6 m)
Cable length (maximum) 300 ft (91 m)
Weight/shipping weight 1 lb / 3 lb (0.5 kg / 1.5 kg)
Sample flow
Low flow cell 1 to 4 gal/hr (4 to 15 L/hr)
Open channel Minimum 0.2 ft/sec (0.06 m/sec)
5% of sensor current at pH 7.0.
(1) Noryl is a registered trademark of General Electric.
(2) Viton is a registered trademark of E.I. duPont de Nemours & Co.
(3) Zitex is a registered trademark of Performance Plastic Corp.
Table 3. Low flow cell specifications
PN 24091-01 contains a bubble sweeping nozzle to keep bubbles from accumulating against the membrane.
Wetted parts Polycarbonate, polyester, 316 stainless steel, and silicone
Process connection 1/4 in. OD tubing compression fitting or 1/4 in. FNPT
Maximum inlet pressure 90 psig (722 kPa abs). Sample must drain to open atmosphere.
Maximum temperature 70 °C (158 °F)
Weight/shipping weight 1 lb / 3 lb (0.5 kg / 1.5 kg)
Note: The temperature and pressure specifications of the flow cell exceed the specifications for the sensor.
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July 2017
Table 4. Valved rotameter specifications
PN 9390004 for use with low flow cell PN 24091-01
Wetted parts Acrylic, 316 stainless steel, Viton
Process connection 1/4 in. NFPT (316 stainless steel)
Maximum pressure 100 psig (858 kPa abs)
Maximum temperature 65 °C (150 °F)
Dimensional Drawings
Figure 1. Standard sensor with integral cable Figure 2. Sensor with Variopol connector
MILLIMETER
INCH
Length of assembled sensor is 9.3 in. (236 mm).
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Rosemount 499ACL-03 Monochloramine Sensor Rosemount 499ACL-03 Monochloramine Sensor
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Figure 3. Low Flow Cell (PN 24091-00)
INCH
MILLIMETER
The bubble sweeping nozzle in the inlet is not shown.
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July 2017
Accessories
Part number Description
23747-06 Interconnecting cable, VP 6, 2.5 ft. (0.8 m)
23747-04 Interconnecting cable, VP 6, 4 ft. (1.2m)
23747-02 Interconnecting cable, VP 6, 10 ft. (3.0 m)
23747-07 Interconnecting cable, VP 6, 15 ft. (4.6 m)
23747-08 Interconnecting cable, VP 6, 20 ft. (6.1 m)
23747-09 Interconnecting cable, VP 6, 25 ft. (7.6 m)
23747-10 Interconnecting cable, VP 6, 30 ft. (9.1 m)
23747-03 Interconnecting cable, VP 6, 50 ft. (15.2 m)
23747-11 Interconnecting cable, VP 6, 100 ft. (30.5 m)
24091-01 Low flow cell with bubble-shedding nozzle
23550-00 Junction box without preamplifier
9200266 Extension cable for option -54, unterminated (specify length)
9200275 Extension cable (optimum EMI/RFI), unterminated (specify length)
23747-00 Extension cable (optimum EMI/RFI), terminated (specify length)
23501-09 Monochloramine membrane assembly: includes one membrane assembly and one O-ring
23502-09 Monochloramine membrane assembly: includes three membrane assemblies and three O-rings
23747-03 Monochloramine sensor fill solution, 4 oz (125 mL)
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Monochloramine Sensor
LIQ-PDS-499ACL-03
www.Emerson.com/RosemountLiquidAnalysis
Product Data Sheet
July 2017
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