Liquiline System CA80NO

Summary

Product identification

The Liquiline System CA80NO is a wet-chemical analyzer designed for the near-continuous determination of nitrite concentration in liquid media. It utilizes a colorimetric measuring principle.

Applications:

• Monitoring of drinking water treatment and distribution
• Monitoring of wastewater treatment plant outlets
• Quality control of raw water for the food industry
• Monitoring of drinking water
• Control of industrial wastewater treatment

The "Cabinet, outdoor version" is suitable for outdoor installation.

Features and Benefits

• Integrated controller with up to 2 measuring channels and digital Memosens technology.
• Easy upgrade to a measuring station by connecting up to 4 Memosens sensors.
• Optional cooled version for extended reagent life.
• Two-channel device option available.
• Supports digital fieldbuses (PROFINET, PROFIBUS DP, Modbus TCP, Modbus RS485, Ethernet IP) and includes a web server.
• Simple, tool-free maintenance.

Measuring Principle

The analyzer employs a colorimetric method. A specific color reagent is added to the sample, causing a color change. A multispectral photometer measures the absorption of light at defined wavelengths. The degree of light absorption is proportional to the nitrite concentration. A reference measurement is performed to compensate for interference influences.

Nitrite Determination:

• Method: Naphthylamine method according to DIN EN 26777.
• Reaction: Nitrite ions react with sulfanilamide and N-(1-naphthyl)-ethylenediamine to form a red dye.
• Measurement Wavelength: 568 nm.

Cross-sensitivity: No cross-sensitivities were observed up to the following concentrations:

• 1000 mg/l (ppm): Cl⁻, SO₄²⁻
• 500 mg/l (ppm): Na⁺, K⁺, Ca²⁺
• 50 mg/l (ppm): CO₃²⁻, NO₃⁻, Fe²⁺, Fe³⁺, Zn²⁺

Measuring System

A complete measuring system includes the Liquiline System CA80NO analyzer, reagent, cleaner and standard solutions (ordered separately), and optionally, a sample conditioning unit (Liquiline System CAT8x0). Various sample preparation options are available, including microfiltration (CAT810) and membrane filtration (CAT820, CAT860).

Reagent Cooling Module (Optional)

An optional smart, energy-efficient cooling module for reagents is available. It uses a Peltier cooler and can extend reagent life up to 12 weeks, making it recommended for ambient temperatures above 20 °C (68 °F).

Input

Measured Variables:

• NO₂, NO₂-N [mg/l, µg/l, ppm, ppb]

Measuring Range:

• CA80NO-**G2: 10 to 500 µg/l NO₂-N
• CA80NO-**G3: 0.1 to 1.0 mg/l NO₂-N
• CA80NO-**G4: 0.2 to 3.0 mg/l NO₂-N

Order version with dilution function (optional): Configurable measuring ranges with corresponding dilution factors are available.

Types of Input:

• 1 or 2 measuring channels (analyzer main parameter)
• Optional: 1 to 4 digital sensor inputs for Memosens protocol sensors
• Optional: Analog current inputs
• Optional: Binary inputs

Input Signal:

• 2 x 0/4 to 20 mA (optional), passive, potentially isolated.
• Current input, passive: Span > 0 to 20 mA, Linear signal characteristic.

Cable Specification (for optional sensors with Memosens technology):

• Cable Type: Memosens data cable CYK10 or sensor fixed cable.
• Cable Length: Max. 100 m (330 ft).

Output

Output Signal:

• 2 x 0/4 to 20 mA, active, potentially isolated (standard).
• 4 x 0/4 to 20 mA, active, potentially isolated (version with 2 additional analog outputs).
• 6 x 0/4 to 20 mA, active, potentially isolated (version with 4 additional analog outputs).
• Binary outputs.

PROFIBUS DP/RS485:

• Signal Encoding: EIA/TIA-485, PROFIBUS DP-compliant acc. to IEC 61158.
• Data Transmission Rate: Up to 12 MBd.

Modbus RS485:

• Signal Encoding: EIA/TIA-485.
• Data Transmission Rate: Up to 115,200 baud.

Modbus TCP:

• Data Transmission Rate: 10 / 100 MBd.

Web server and Modbus TCP:

• Data Transmission Rate: 10 / 100 MBd.

EtherNet/IP:

• Data Transmission Rate: 10 / 100 MBd.

PROFINET:

• Communication Type: 100 MBit/s.
• Baud Rate: Automatic 100 Mbps with full-duplex detection.

Signal on alarm: Adjustable, as per NAMUR Recommendation NE 43. Failure current factory setting: 21.5 mA.

Current Outputs, Active:

• Load: Max. 500 Ω.
• Output voltage: Max. 24 V.

Relay Outputs:

• Relay Types: 1 changeover contact (alarm), 2 or 4 changeover contacts (optional).
• Maximum Load: 0.5 A (alarm relay), 2.0 A (other relays).

Electrical

Supply Voltage:

• 100 to 120 V AC / 200 to 240 V AC or 24 V DC (not for "Outdoor" version).
• 50 or 60 Hz.

Power Consumption:

• All versions except "Outdoor": 130 VA + 660 VA per hose heater, max. 1450 VA (with cooling system). 24-V version: max. 105 W.
• "Outdoor" version: 680 VA + 660 VA per hose heater, max. 2000 VA (with cooling system).

Fuse: 5 x 20 mm 10 A/250 V fine-wire fuse for hose trace heating system.

Performance Characteristics

Maximum Measured Error:

• CA80NO-AAG2/AAG3/AAG4: 2 % of end of measuring range.
• With dilution and dilution factor 5: additionally 2.0 % of end of measuring range.

Maximum Measurement Error for Sensor Inputs: Refer to the documentation of the connected sensor.

Maximum Measurement Error for Current Inputs and Outputs:

• Typical: < 20 μA (at < 4 mA), < 50 μA (at 4 to 20 mA).
• Additional error depending on temperature: < 1.5 μA/K.

Repeatability:

• To 150 µg/l: ± 3 µg/l.
• ≥ 150 µg/l to 600 µg/l: ± 10 µg/l.
• ≥ 600 µg/l: ± 20 µg/l.
• With dilution and dilution factor 5: Additionally 1.0 % of end of measuring range.

Repeatability of Sensor Inputs: Refer to the documentation of the connected sensor.

Measuring Interval: Continuous (approx. 7 min), adjustable from 10 min to 24 h.

Sample Requirement:

• Without dilution module: 22 ml/measurement.
• With dilution module: 11 to 15 ml sample/measurement and 17 to 21 ml dilution water/measurement (depends on dilution factor).

Reagent Requirement: Approx. 100 μl per reagent and measurement. Reagent lasts approx. 2 months with a 10 min measuring interval.

Standard Requirement: Approx. 420 ml per month with a calibration interval of 48 h.

Calibration Interval: 1 h to 90 days.

Maintenance Interval: Every 3 to 6 months.

Environment

Ambient Temperature Range:

• All housing versions (except outdoor): +5 to +40 °C (41 to 104 °F).
• Outdoor version: -20 to +40 °C (-4 to 104 °F).

Storage Temperature: –20 to 60 °C (–4 to 140 °F).

Relative Humidity: 10 to 95 %, non-condensing.

Degree of Protection: IP55 (cabinet, analyzer stand), TYPE 3R (cabinet, analyzer stand).

Electromagnetic Compatibility: Interference emission and interference immunity as per EN 61326-1, class A for industrial areas.

Electrical Safety: According to EN/IEC 61010-1:2010, Class I equipment.

Pollution Degree: Pollution level 2.

Process

Sample Temperature: 4 to 40 °C (39 to 104 °F).

Consistency of the Sample: Low solids content (turbidity < 50 NTU), aqueous, homogenized.

Sample Supply: Unpressurized.

Mechanical Construction

Dimensions: See figures 20, 21, 22 for specific dimensions of closed, open, and base-mounted versions.

Weight:

• Cabinet version: 39.5 to 42 kg.
• Open installation: 31.5 to 34 kg.
• Analyzer stand: 72.5 to 75 kg.

Materials:

• Parts not in contact with medium: ASA + PC, PP, Safety glass (coated), EPP, Powder-coated sheet steel.
• Parts in contact with medium: PP, TPE, FKM, Borosilicate glass, FFKM, EPDM.

Process Connection:

• Sample inlet: Plug-in connector (rigid hoses OD 4 mm) or hose barb (flexible hoses ID 1.6 mm).
• Dilution water: Hose barb (flexible hoses ID 3.2 mm).
• Outlet: Hose barb (flexible hoses ID 13 mm).

Hose Entries: 4 x bores for M32.

Hose Specification (self-priming):

• Clearance: max. 1.0 m (3.3 ft).
• Height: max. 0.5 m (1.6 ft).
• Hose ID: 1.6 mm (¹/16 in).

Operability

Operation Concept: Intuitive operation with navigator and soft keys, plain-text display, easily configurable measurement options and diagnostics.

Display: Graphic display (240 x 160 pixel) with backlight, red background for alarms, transflective technology.

Remote Operation: Via HART, PROFIBUS DP, Modbus RS485, or Ethernet (web server/Modbus TCP/PROFINET/Ethernet/IP).

Language Packages

English (US), German, Chinese (Simplified, PR China), Czech, Dutch, French, Italian, Japanese, Polish, Portuguese, Russian, Spanish, Turkish, Hungarian, Croatian, Vietnamese. Additional languages may be available.

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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