Technical Information

CCS120Sensor for total chlorine

Application• Drinking water conditioning• Pool water conditioning• Service water conditioning• Waste water treatment
Your benefits• Flow and immersion installation• Works with the well known assemblies:
CCA250
CYA611• Works with the transmitter CCM223/253• Retrofitable in existing applications• Sensor selection via menu of the transmitter CCM223/253• Temperature sensor NTC 10K

TI388C/07/en/07.06
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CCS120

Function and system design
Measuring principle

The amperometric sensor is based on the conversion of the measuring variable chlorine in electrical current.
Two electrodes covered by an electrolyte are in contact to the medium via a membrane. It has a platinum
working electrode and a silver halogenide coated counter or reference electrode. The chlorine compounds
contained in the medium diffuse through the membrane. The constant polarisation voltage between the twoelectrodes instigates the electrochemical reaction of the chlorine compounds on the working electrode. The
resulting current is measured as a primary signal (amperometric measurement principle). It is proportional tothe chlorine concentration within the sensor’s operating range and only slightly pH dependant for this type ofsensor. The primary signal is converted by the amplifier electronics of the sensor into a 0 ... 5 µA output signal
which is displayed by the transmitter.

Function

The sensor CCS120 is a membrane-capped amperometric two electrode sensor. It is used for continuous
measurement of total chlorine.
Total chlorine consists of free chlorine (HOCl, OCl-) and bound chlorine (chloramines).
To calibrate the measuring system, determine the content of chlorine using the DPD 1 / DPD 4 method. To
do so, you need a photometer with the pertaining reagents. The determined value is the calibration value forthe transmitter.

Measuring system

A complete measuring system in the flow mode comprises at least:• Chlorine sensor• Transmitter Liquisys M CCM223/253• Special measuring cable• Flow assembly

89450.42mg/l

25.0 ¡C
REL1
ALARM
CAL

REL

REL2
REL1

E

6

REL2

7

3

2
1a0001691

Measuring system in the flow mode (example)

123
4
5

Flow assembly CCA250
Medium inlet
Inductive proximity switch for flow monitoring
Mounting place for pH/redox sensor
Chlorine sensor CCS120

6789Medium outlet
Sampling tap
Measuring cable CPK9-N*A1B
Transmitter

The described above measuring system is available as CCE-station (fully mounted on a board).

2Endress+Hauser

CCS120

A complete measuring system in the immersion mode comprises at least:• Chlorine sensor• Transmitter Liquisys M CCM223/253• Special measuring cable• Immersion assembly
120.42mg/l

25.0 ¡C
REL1
ALARM
CAL

REL

REL2
REL1

EREL2

63

45a0001791

Measuring system in the immersion mode (example)

123Junction box VBMTransmitterMeasuring cable CYK71

45Immersion assembly CYA611-0B
Chlorine sensor CCS120

Input
Measured variables

Total chlorine

Measuring range

0.1 ... 10 mg/l

Standard slope

110 ... 120 nA/(mg/l)

Free chlorine (Cl2 (dissolved), HOCl, OCl-)
Bound chlorine (chloramines)
Organic-bound chlorine (e.g. cyanuric acid derivates)

OutputOutput signal

0 ... 5 µA for connection to transmitter Liquisys M CCM223/253 with software version 2.32 or later

Power supply
Power supply

Endress+Hauser

15 V DC, 10 mA

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CCS120

Performance characteristics
Response time

T90 approx. 60 s (as concentration rises and falls)

Resolution

0.01 mg/l

pH range

5.5 ... 9.5
pH dependency: jump from pH 7 to pH 8: approx. -10 % for free chlorine

Conductivity range

0.03 ... 40 mS/cm

Temperature range

5 ... 45 °C (41 ... 113 °F), no quick changes in temperature allowed

Pressure

Medium in the CCA250 assembly: max. 1 bar (14.5 psi)

Flow

optimum:
minimum:
maximum:

40 ... 60 l/h (10.56 ... 15.84 US.gal/h)
30 l/h (7.92 US.gal/h)
100 l/h (26.40 US.gal/h)Minimum input flow velocity

optimum:
minimum:
maximum:

20 ... 30 cm/s (0.7 ... 1.0 ft/s)
15 cm/s (0.5 ft/s)
50 cm/s (1.6 ft/s)

Cross sensitivity

Oxidising reagents e.g. bromine, iodine, ozone, chlorine dioxide, permanganates result in false positive results.
Reducing reagents like sulphides, sulphites, tiosulphates, and hydrazine result in false negative results.

Service life membrane cap

Typically 3 - 6 months, depending on water quality

Installation
Installation conditions

The minimum flow may not drop below 30 l/h (7.92 US.gal/h).
The minimum input flow velocity may not drop below XXX.
Installation in flow assembly CCA250 or pendulum assembly CYA611-0B with thread NPT 3/4".

Environment
Storage temperature

Filled with electrolyte:
Without electrolyte:

Ingress protection

IP 68

45 ... 50 °C (41 ... 122 °F)-20 ... +60 °C (-4 ... +140 °F)

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CCS120

Mechanical construction
Dimensions

27/1.06

NPT 3/4

183/7.20

Ø 29/
1.14

Ø 36/
1.42

Ø 25/
0.98

74/2.91Ø 28.8/1.13

mm/incha0003082

Dimensions

Weightapprox. 0.14 kg (0.31 lbs)

Materials

Sensor shaft:
Membrane cap:

Temperature sensor

NTC 10 kΩ at 25 °C (77 °F)

Plug-in head

TOP68 plug-in head

Cable length

max. 15 m (49.2 ft)

Endress+Hauser

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CCS120

Ordering information
Sensor CCS120

Mesuring range
A 0.1 ... 10 mg/l
Head type
S Thread NPT 3/4"; plug TOP 68
Options
0 none
CCS120-

CCE systemcomplete order code

The CCE Compact chlorine system (mounted on a board) consists of four modules:
ModuleOrder no.

Sensor CCS120

CCS120-xxx

CCE-1 board

50041731

Measuring cable for CCE151517204

Liquisys M (of your choice)

CCM253..... (see Technical Information TI214C/07/en)

In North America the four modules are available as a complete package (115 V, CSA).
Order no. 51517437

Accessories
Connection accessories

Junction box VBM• For cable extension, with 10 terminals• IP 65 / NEMA 4X• Material: aluminum• Order numbers:– cable entry Pg 13.5: 50003987– cable entry NPT ½": 51500177• Measuring cable CCS120-1M, cable length: 1 m (3.28 ft), for compact chlorine system CCE1
order no. 51517204• Special measuring cable CPK9-N*A1B internal PM wire
For sensors with TOP68 plug-in head, for high-temperature and high-pressure applications, IP 68
Ordering acc. to product structure, see Technical Information (TI118C/07/en)

Installation accessories• Flow assembly CCA250
for chlorine, chlorine dioxide, pH and redox;
Ordering acc. to product structure, see Technical Information (TI062C/07/en)• Immersion assembly Dipfit W CYA611-0B
for sensor immersion in basins, open channels and tanks, PVC;
Ordering acc. to product structure (Technical Information TI166C/07/en)• Compact chlorine system CCE1
Factory-assembled and wired panel for transmitter with flow assembly CCA250-A1; see also Technical
Information TI014C/07/en

Transmitter6• Liquisys M CCM223/253
Transmitter for chlorine, field or panel-mounted housing,Hart® or PROFIBUS available,Ordering acc. to product structure, see Technical Information (TI214C/07/en)

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CCS120

Maintenance• Photometer CCM182; microprocessor-controlled photometer for chlorine, pH value, cyanuric acid;
Chlorine measuring range: 0.05 to 6 mg/l
pH measuring range: 6.5 to 8.4• Electrolyte for CCS120, 50 ml
order no. 51516343• Service kit for CCS120, consists of 2 membrane caps and 1 bottle of electrolyte (50 ml)
order no. 51517284

Documentation
Transmitters• Liquisys M CCM223/253, Technical Information TI214C/07/en; order no. 51502336

Compact system• Compact chlorine system CCE1, Technical Information TI014C/07/en; order no. 50050696

Measuring cables• CPK1-12, Technical Information TI118C/07/en; order no. 50068526

Assemblies• Flow assembly CCA250, Technical Information TI062C/07/en; order no. 50057220• Immersion assembly CYA611, Technical Information TI166C/07/en; order no. 50085985

Endress+Hauser7

International Head Quarters
Endress+Hauser
GmbH+Co. KG
Instruments International
Colmarer Str. 679576 Weil am Rhein
Deutschland
Tel. +49 76 21 9 75 02
Fax +49 76 21 9 75 34 5
www.endress.com
info@ii.endress.com

TI388C/07/en/07.06
51517374
Printed in Germany / FM+SGML 6.0 / DT