Smartec CLD134

Summary

Product identification

Product: Smartec CLD134 Type: Hygienic measuring system for conductivity and concentration. Application Industries: Food, beverage, pharmaceutical, and biotechnology.

Application Areas

• Phase separation (product/water, product/product) in pipe systems.
• Control of Cleaning In Place (CIP) processes in return lines.
• Concentration control for CIP cleaning agent remaking.
• Product monitoring in pipes, bottling plants, and quality assurance.
• Leakage monitoring.

Measuring Principle

Inductive conductivity measurement using an oscillator, primary coil, induced current flow in the medium, secondary coil, and receiver to determine conductivity.

Advantages of Inductive Measurement:

• No electrodes, preventing polarization effects.
• Accurate measurement in heavily polluted media prone to buildup.
• Complete galvanic isolation between the measurement and the medium.

Key Features

• Hygienic Design: Injection-molded PEEK sensor, seamless and crevice-free. Virgin PEEK in contact with the medium ensures biological safety. Designed according to ASME BPE guidelines and meets EC Regulation No. 1935/2004.
• Certified Hygiene: FDA-listed materials for medium contact, 3-A standards certification, EHEDG certification (CLS54 sensor for cleanability), optional USP class VI biological reactivity testing with lot traceability.
• Process Connections: Available with commonly used hygienic connections, with custom options on request.
• Process Temperature & Pressure:
  • Continuous temperatures up to 125 °C (257 °F).
  • Temporary sterilization temperatures up to 150 °C (302 °F) (max. 60 minutes).
  • Pressure resistance up to 12 bar (174 psi) abs at temperatures up to 90 °C (194 °F).
  • Suitable for underpressure applications.
• Temperature Measurement: Integrated temperature sensor with response time t90 < 26 s. Embedded without seals for long service life.
• Temperature Compensation: Options include linear (user-configurable coefficient α), IEC 60746-3 (NaCl), and user-programmable coefficient tables (up to 10 elements).
• Concentration Measurement: Switchable from conductivity mode. Offers user-programmable and pre-programmed concentration curves (e.g., for CIP solutions), displaying concentration directly as %.
• Remote Parameter Set Configuration (MRS): Allows for measurement range switching, adjustment of temperature compensation, and switching between concentration curves.
• Device Versions: Available as compact or remote systems. Transmitter can be ordered separately.

Measured Values

• Conductivity
• Concentration
• Temperature

Measuring Ranges

• Conductivity: Recommended range: 100 μS/cm to 2000 mS/cm (uncompensated).
• Concentration:
  • NaOH: 0 to 15 %
  • HNO₃: 0 to 25 %
  • H₂SO₄: 0 to 30 %
  • H₃PO₄: 0 to 15 %
  • User-defined: Up to 4 tables available with MRS function.
• Temperature: -35 to +250 °C (-31 to +482 °F) (Pt 1000).

Electrical Specifications

• Input:
  • Binary inputs: 10 to 50 V, max. 10 mA at 50 V.
• Output:
  • Conductivity/Concentration: 0/4 to 20 mA, galvanically isolated.
  • Temperature (optional second current output).
  • Signal on alarm: 2.4 or 22 mA.
  • Load: Max. 500 Ω.
  • Separation voltage: Max. 350 VRMS / 500 V DC.
  • Minimum output signal spread:
    • Conductivity: 200 μS/cm to 200 mS/cm depending on range.
    • Temperature: 15 °C or 27 °F.
  • Auxiliary voltage output: 15 V ± 0.6 V, max. 10 mA.
  • Contact outputs: Max. 2 A switching current, max. 250 V AC / 30 V DC switching voltage.
  • Switching power: Max. 500 VA AC / 60 W DC (ohmic load).
• Power Supply:
  • Versions: 100/115/230 V AC ±10/-15 %, 48-62 Hz or 24 V AC/DC +20/-15 %.
  • Power consumption: Max. 7.5 VA.
  • Mains fuse: 250 V/3.15 A (semi-delay).
• Electrical Connection: Terminals for signal outputs, auxiliary voltage, binary inputs, and power supply.

Performance Characteristics

• Measured value resolution: Temperature: 0.1 °C.
• Response time:
  • Conductivity: t95 < 1.5 s.
  • Temperature: t90 < 26 s.
• Measured error:
  • Sensor (Conductivity): ± (0.5 % of reading + 10 μS/cm) after calibration.
  • Sensor (Temperature): Pt 1000 Class A (IEC 60751).
  • Transmitter (Conductivity): Max. 0.5 % of measured value ± 4 digits (display); Max. 0.75 % of current output range (output).
  • Transmitter (Temperature): Max. 0.6 % of measuring range (display); Max. 0.75 % of current output range (output).
• Repeatability: Conductivity: Max. 0.2 % of measured value ± 2 digits.
• Cell constant: 6.3 cm⁻¹.
• Measuring frequency: 2 kHz.
• Temperature compensation range: -10 to +150 °C (14 to 302 °F).
• Reference temperature: 25 °C (77 °F).

Installation

• Sensor must be fully immersed; avoid air bubbles.
• Install at least 1 m (3.3 ft) downstream from pipe bends.
• Installation factor: Accounts for wall effects in confined installations; can be entered in the transmitter. Factor can be disregarded if wall distance a > 15 mm (from DN 65).
• Air set: Must be performed before installation to compensate for residual coupling.

Environmental Conditions

• Ambient temperature:
  • Compact version/electronics: 0 to +55 °C (32 to 131 °F).
  • Sensor (remote): -20 to +60 °C (-4 to 140 °F).
• Storage temperature: -25 to +70 °C (-13 to 158 °F).
• Electromagnetic compatibility: As per EN 61326-1 and EN 61326-2-3.
• Degree of protection: IP67 / Type 4.
• Relative humidity: 10 to 95 % (non-condensing).
• Vibration resistance: 10 to 500 Hz, 0.15 mm deflection, 19.6 m/s².

Process Conditions

• Process temperature:
  • Remote version: Max. 125 °C (257 °F) at 70 °C ambient.
  • Compact version: Max. 125 °C (257 °F) at 35 °C ambient; Max. 55 °C (131 °F) at 55 °C ambient.
• Sterilization: Max. 150 °C (302 °F) for max. 60 minutes (conditions vary by version and ambient temperature).
• Absolute process pressure:
  • Up to 90 °C (194 °F): 13 bar (188.5 psi) abs.
  • At 125 °C (257 °F): 9 bar (130.5 psi) abs.
  • CRN environment: 1 to 6 bar (14.5 to 87 psi) abs.
  • Negative pressure: Down to 0.1 bar (1.45 psi) absolute.
• Flow velocity: Max. 5 m/s (16.4 ft/s) for low-viscosity media in DN65 pipes.

Mechanical Construction

• Dimensions: See drawings for remote and compact versions.
  • Remote version (with mounting plate): 225 x 142 x 109 mm.
  • Compact version (MV5, CS1, AA5, SMS): 225 x 142 x 255 mm.
  • Compact version (VA4, BC5): 225 x 142 x 213 mm.
• Weight:
  • Remote transmitter: Approx. 2.5 kg (5.5 lb).
  • CLS54 sensor: 0.3 to 0.5 kg (0.66 to 1.1 lb).
  • Compact version: Approx. 3 kg (6.6 lb).
• Materials:
  • CLS54 sensor (medium contact): Virgin PEEK.
  • CLS54 sensor (other): PPS-GF40, Stainless steel 1.4404 (AISI 316L), FKM, EPDM.
  • Transmitter housing: Stainless steel 1.4301 (AISI 304).
  • Front window: Polycarbonate.
• Chemical Resistance (PEEK sensor): See table for specific concentrations and temperatures of NaOH, HNO₃, H₃PO₄, H₂SO₄, and Peracetic acid.
• Process Connections:
  • Sanitary connection DIN 11851 (DN 50)
  • Aseptic coupling DIN 11864-1 form A
  • Clamp ISO 2852 (2")
  • SMS coupling 2"
  • Varivent N (DN 40 - 125)
  • NEUMO BioControl D50 (DN 40, 2")
  • Additional connections available on request.

Operability

• Display and operating elements: LC display, four operating keys, LED for alarm.
• Operation: Via keypad, HART handheld terminal, PC with FieldCare, or PROFIBUS PA/DP.
• Menu structure: Clear menu with access code protection.

Certificates and Approvals

• Hygiene: FDA listed materials, EHEDG Type EL - Class I certified, 3-A Standard 74- certified.
• Biological Reactivity: Optional USP class VI certification.
• EC Regulation: Meets requirements of EC Regulation No. 1935/2004.
• Pressure Approval: Canadian pressure approval (ASME B31.3).

Accessories

• Cable extension: CLK6 measuring cable, VBM junction box.
• Desiccant pouch: For VBM junction box.
• Post mounting kit: For remote version mounting.
• Software upgrade: Function upgrade for MRS and temperature coefficient determination (Order No. 51501643).
• Optoscope: Interface for service purposes with Scopeware software (Order No. 51500650).
• Calibration solutions: CLY11 series (various conductivity values).

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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