CCS120

Summary

Product identification

• Product: CCS120 Sensor for total chlorine
• Manufacturer: Endress+Hauser Liquid analysis
• Document: Technical Information TI388C/07/en, Revision 07.06, 51517374

Application

• Drinking water conditioning
• Pool water conditioning
• Service water conditioning
• Waste water treatment

Measuring principle

The CCS120 is an amperometric sensor utilizing a membrane and electrolyte. It converts the chlorine concentration into an electrical current proportional to the concentration. This current is then converted to a 0-5 µA output signal by the transmitter. The sensor measures total chlorine, which includes free chlorine (HOCl, OCl⁻) and bound chlorine (chloramines), as well as organic-bound chlorine.

Measuring system

A complete measuring system requires:

• Chlorine sensor CCS120
• Transmitter Liquisys M CCM223/253 (with software version 2.32 or later)
• Special measuring cable
• Assembly (Flow assembly CCA250 or Immersion assembly CYA611)

The system can be purchased as a pre-mounted CCE-station.

Input

• Measured variables: Total chlorine, Free chlorine (Cl₂ (dissolved), HOCl, OCl⁻), Bound chlorine (chloramines), Organic-bound chlorine (e.g., cyanuric acid derivatives)
• Measuring range: 0.1 ... 10 mg/l
• Standard slope: 110 ... 120 nA/(mg/l)

Output

• Output signal: 0 ... 5 µA (for connection to Liquisys M CCM223/253 with software version 2.32 or later)

Power supply

• Voltage: 15 V DC
• Current: 10 mA

Performance characteristics

• Response time: T90 approx. 60 s (concentration rise and fall)
• 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 (operation): 5 ... 45 °C (41 ... 113 °F); no quick temperature changes allowed
• Service life membrane cap: Typically 3 - 6 months (depending on water quality)

Operating limits

• Pressure (Medium in CCA250 assembly): max. 1 bar (14.5 psi)
• Flow (minimum input flow velocity): Not specified (XXX)
• Flow (minimum): 30 l/h (7.92 US.gal/h)
• Flow (optimum): 40 ... 60 l/h (10.56 ... 15.84 US.gal/h)
• Flow (maximum): 100 l/h (26.40 US.gal/h)
• Flow velocity (minimum): 15 cm/s (0.5 ft/s)
• Flow velocity (optimum): 20 ... 30 cm/s (0.7 ... 1.0 ft/s)
• Flow velocity (maximum): 50 cm/s (1.6 ft/s)

Cross sensitivity

• Oxidizing reagents: Bromine, iodine, ozone, chlorine dioxide, permanganates may result in false positive readings.
• Reducing reagents: Sulphides, sulphites, thiosulphates, and hydrazine may result in false negative readings.

Installation

• Installation methods: Flow and immersion installation.
• Assemblies: CCA250 (flow) or CYA611-0B (immersion) with NPT 3/4" thread.
• Environment (Storage temperature):
  • Filled with electrolyte: 5 ... 50 °C (41 ... 122 °F)
  • Without electrolyte: -20 ... +60 °C (-4 ... +140 °F)
• Ingress protection: IP 68

Mechanical construction

• Dimensions: See diagram.
• Weight: approx. 0.14 kg (0.31 lbs)
• Temperature sensor: NTC 10 kΩ at 25 °C (77 °F)
• Head: TOP68 plug-in head
• Cable length: max. 15 m (49.2 ft)
• Materials:
  • Sensor shaft: PVC
  • Membrane cap: PPE

Accessories

• Transmitter: Liquisys M CCM223/253
• Flow assembly: CCA250
• Immersion assembly: CYA611-0B
• Junction box: VBM (IP 65 / NEMA 4X)
• Measuring cables: CPK9-N*A1B (special), CPK1-12
• Compact system: CCE1 (CCE Compact chlorine system)

Maintenance

• Electrolyte: 50 ml (Order no. 51516343)
• Service kit: Includes 2 membrane caps and 1 bottle of electrolyte (Order no. 51517284)
• Calibration: Using DPD 1 / DPD 4 method with a photometer.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror