Endress+Hauser CCS51-AA11AD03 | Analog Free Chlorine Sensor, 0-5 ppm, 3m Cable
Endress+Hauser CCS51-AA11AD03 analog free chlorine sensor. Measures 0-5 mg/L HOCl (trace range), amperometric principle, 3m fixed cable, IP68, for drinking & process water.
Product Overview
The Endress+Hauser CCS51-AA11AD03 is an analog amperometric sensor for precise measurement of free chlorine (HOCl) in water treatment. It covers the 0–5 mg/L (ppm) trace range, ideal for monitoring low residual levels in drinking water and disinfection processes. The sensor features a PVDF membrane, integrated 10 kΩ NTC temperature sensor, and a 3-meter fixed cable for direct connection to compatible transmitters like the Liquisys series.
Technical Specifications (Measurement & Electrical)
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Parameter
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Specification
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Model / Order Code
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CCS51-AA11AD03
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Measurand
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Free Chlorine (HOCl) Concentration
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Measuring Range
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0 ... 5 mg/L (ppm) – Trace Range
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Measuring Principle
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Amperometric, membrane-covered 2-electrode cell
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Signal Output
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Analog (Current Signal via Fixed Cable)
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Cable Length
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3 m (Fixed)
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Temperature Sensor
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10 kΩ NTC (Integrated)
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Typical Sensitivity
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~48 nA per 1 mg/L HOCl
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Technical Specifications (Mechanical & Process)
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Parameter
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Specification
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Sensor Body Material
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POM (Polyoxymethylene)
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Membrane Material
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PVDF (Polyvinylidene Fluoride)
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Process Connection
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25 mm Diameter (for CCA151/250, CYA112 Mounting)
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Immersion Length
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~161 mm
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Process Temperature
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0 ... 55 °C (Non-freezing)
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Process Pressure
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≤ 1 bar (at membrane surface)
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Protection Rating
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IP68 (Submersible)
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Minimum Flow
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~5 L/h (Flow-through)
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Key Features
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Trace-Level Accuracy: Optimized for low-range 0–5 ppm free chlorine measurement, critical for drinking water disinfection compliance and residual monitoring.
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Robust Membrane Design: PVDF membrane cap and POM body provide high chemical resistance to chlorine, ozone, and aggressive water matrices, reducing fouling.
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Integrated Temperature Compensation: Built-in NTC 10 kΩ sensor ensures accurate readings across the operating temperature range.
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Ready-to-Install: 3-meter fixed cable simplifies field wiring and reduces connection failure points compared to separate plug systems.
Applications
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Drinking Water Treatment: Residual free chlorine monitoring in municipal waterworks and distribution networks.
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Swimming Pool & Spa: Disinfection control and dosing optimization.
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Process Water & Cooling Towers: Biofilm and legionella prevention in industrial water systems.
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Wastewater Reuse: Effluent disinfection monitoring.
About ACH
Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.
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Frequently Ask & Questions
Are preferential prices available?
Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.
Are the Products Genuine OEM Units?
Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.
How will you arrange shipment?
We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.
What is the warranty of goods?
One-year Warranty.
How long is the logistics cycle of the product?
Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.
