Smartec S CLD132

Summary

Product identification

Smartec S CLD132 Measuring system with inductive sensor for conductivity and concentration measurement in the food industry.

Application

• Product monitoring in breweries, dairies, and the beverage industry.
• CIP system control.
• Phase separation of product/water and product/product mixtures in pipe systems.
• Alkali and acid concentration control in remaking.
• Monitoring and control of bottle cleaning systems.

Key Features

• Transmitter housing made of stainless steel.
• Sensor made of highly resistant PEEK (polyether ether ketone).
• Sterilizable sensor.
• High measuring reliability due to extensive self-monitoring functions.
• Insensitive to polarization and soiling.
• Versions with ultrafast temperature response (t90 < 5 s) available.
• Sensor versions for hygienic applications with various process connections.
• Multiple operating possibilities: keys, HART® hand-held terminal, PROFIBUS PA/DP, PC with Commuwin II software.
• Large two-line display for simultaneous measurement and temperature readings.
• Standard version extendable with function extensions for remote parameter set switching (measuring range switching).

Measuring Principle

Inductive conductivity measurement using an alternating magnetic field to induce a current in the medium. The strength of this induced current, measured by a secondary coil, is proportional to the medium's conductivity and ion concentration.

Important Properties

Hygiene

The PEEK sensor is injection-molded without joints or crevices, ensuring hygienic safety.

Temperature Measurement

• Fast Response: Pt 100 sensor in a stainless-steel socket with Chemraz O-ring for rapid temperature response (t90 < 5 s), suitable for applications like CIP return.
• High Load: Pt 100 sensor embedded in the PEEK sensor body, eliminating the need for a seal, ensuring long service life under high thermal loads and temperature shocks. This version can also be used under negative pressure.

Temperature Compensation

• Linear compensation with a selectable temperature coefficient (α).
• Compensation according to IEC 746-3 for NaCl.
• Compensation with a programmable coefficient table (up to 10 elements).

Process Temperature

Suitable for continuous exposure to +125 °C. Short-time (max. 30 min) operation at +140 °C for sterilization.

Concentration Measurement

The transmitter can switch to concentration mode, offering a freely programmable curve and predefined curves for common CIP solutions, allowing direct display of concentration in %.

Remote Parameter Set Switching (MRS)

Enables:

• Covering a wide measuring range.
• Adjusting temperature compensation when changing products.
• Switching between concentration curves.

Measuring System Components

A complete system includes the Smartec S CLD132 transmitter and the CLS52 conductivity sensor (with integrated temperature sensor and fixed cable), or the CLD132 compact version with integrated CLS52 sensor. Optional accessories include CLK5 extension cable, VBM junction box, and mounting kits.

Input

• Measured Variables: Conductivity, Concentration, Temperature.
• Measuring Range:
  • Conductivity: Recommended 100 µS/cm ... 2000 mS/cm (uncompensated).
  • Concentration: NaOH (0–15%), HNO₃ (0–25%), H₂SO₄ (0–30%), H₃PO₄ (0–15%), User 1-4 (with remote parameter set switching).
  • Temperature: -35 ... +250 °C / -31 ... +482 °F.
• Sensor Cable Length: Max. 55 m / 180.46 ft with CLK5 cable (separate version).
• Binary Inputs: 2.
• Voltage: 10–50 V DC.
• Current Consumption: Max. 10 mA at 50 V.

Output

• Output Signal: 0/4–20 mA, galvanically isolated (Conductivity). Optional second current output for Temperature.
• Signal on Alarm: 2.4 mA or 22 mA error current.
• Load: Max. 500 Ω.
• Signal Resolution:
  • Conductivity: 2 µS/cm to 200 mS/cm depending on range.
  • Concentration: Not specified.
  • Temperature: 0.1 °C / 0.18 °F.
• Separation Voltage: Max. 350 VRMS / 500 V DC.
• Auxiliary Voltage Output: 15 V ± 0.6 V, max. 10 mA.
• Contact Outputs (Limit Contactor - with MRS only):
  • Switching Voltage: Max. 250 V AC, 30 V DC.
  • Switching Current (ohmic load): Max. 2 A.
  • Switching Power (ohmic load): Max. 500 VA AC, 60 W DC.
  • Pickup/Dropout Delay: 0–2000 s.
  • Alarm Delay: 0–2000 s (min).

Power Supply

• Supply Voltage:
  • 100 / 115 / 230 V AC +10 / -15 %, 48–62 Hz.
  • 24 V AC/DC +20 / -15 %.
• Power Consumption: Max. 7.5 VA.
• Mains Fuse: Fine-wire fuse, medium time lag, 250 V / 3.15 A.

Performance Characteristics

• Temperature Response Time:
  • t90 < 5 s (stainless steel socket versions).
  • t90 < 3.5 min (encapsulated Pt 100 versions).
• Measured Error:
  • Conductivity:
    • -5 to +100 °C: ±(10 µS/cm + 0.5% of measured value).

    • 100 °C: ±(30 µS/cm + 0.5% of measured value).

  • Temperature: Pt 100 class A acc. to IEC 751.
• Measured Error of Transmitter:
  • Conductivity (Signal Output): Max. 0.75 % of current output range.
  • Temperature (Signal Output): Max. 0.75 % of current output range.
• Repeatability:
  • Conductivity (Display): Max. 0.5 % of measured value ± 4 digits.
  • Temperature (Display): Max. 0.6 % of measuring range.

Cell Constant

• 5.9 cm⁻¹.
• Measuring frequency: 2 kHz.

Temperature Compensation

• Reference Temperature: 25 °C / 77 °F.
• Temperature Offset: Adjustable, ± 5 °C / 9 °F for display adjustment.
• Compensation Types: None, linear with selectable coefficient, programmable coefficient table, NaCl acc. to IEC 746-3.

Installation

• Installation Factor: Compensates for pipe wall effects in narrow installations. Can be entered in the transmitter or used to correct the cell constant.
• Minimum Distance from Wall: If a > 15 mm (from DN 65), the installation factor is typically 1.00.
• Air Set: Zero calibration in air is required before installation to compensate for residual coupling.

Environmental Limits

• Ambient Temperature: 0 to +55 °C / 32 to 131 °F.
  • Separate version: -10 to +70 °C / 14 to 158 °F.
  • Compact version: -10 to +55 °C / 14 to 131 °F.
• Storage Temperature: -25 to +70 °C / -13 to 158 °F.
• Electromagnetic Compatibility: Acc. to EN 61326.
• Ingress Protection: IP 67.
• Relative Humidity: 10–95%, non-condensing.
• Vibration Resistance: Up to 500 Hz, 0.15 mm deflection or 19.6 m/s² acceleration.
• Impact Resistance: Display window: 9 J.

Process Limits

• Process Temperature:
  • CLS52 sensor (separate version): Max. 125 °C / 257 °F (70 °C ambient).
  • Compact version: Max. 125 °C / 257 °F (35 °C ambient) or 55 °C / 131 °F (55 °C ambient).
• Sterilization:
  • CLS52 sensor (separate version): 140 °C / 284 °F (max. 30 min) at 70 °C ambient, 4 bar.
  • Compact version: 140 °C / 284 °F (max. 30 min) at 35 °C ambient, 4 bar.
• Process Pressure:
  • Max. 16 bar (90 °C) / 232 psi (194 °F).
  • No underpressure allowed with stainless steel socket versions.

Mechanical Construction

• Dimensions:
  • Separate transmitter: 225 x 142 x 109 mm / 8.86 x 5.59 x 4.29".
  • Compact transmitter (MV1, CS1, GE1, SMS): 225 x 142 x 242 mm / 8.86 x 5.59 x 9.53".
  • Compact transmitter (VA1, AP1): 225 x 142 x 180 mm / 8.86 x 5.59 x 7.09".
• Weight:
  • Separate transmitter: approx. 2.5 kg / 5.5 lb.
  • CLS52 sensor: approx. 400–800 g / 0.9–1.8 lb.
  • Compact version: approx. 3 kg / 6.6 lb.
• Materials (in contact with medium): PEEK.
• Transmitter Housing: Stainless steel 1.4301.
• Sensor Materials: PEEK, Stainless steel 1.4435 (AISI 316L), Chemraz®, EPDM.

Chemical Durability of Sensor

See the official PDF for exact tabulated values for various media (Caustic soda, Nitric acid, Phosphoric acid, Sulphuric acid) and their corresponding concentration and temperature ranges.

Process Connections

Various hygienic process connections are available, including Dairy fitting (DIN 11851), Clamp connection (ISO 2852), Internal thread (G 1½), Varivent, APV, and SMS.

Human Interface

• Display: LC display showing measured values and configuration data.
• Keys: Four operating keys for calibration and configuration.
• Indicator: LED for alarm function.
• Operation: Local via keys, HART® interface (hand-held terminal or PC), or PROFIBUS PA/DP (PC or PLC).

Calibration and Configuration

Functions are arranged in a menu structure, requiring an access code for modifications.

Ordering Information

The product structure includes options for version (compact, separate transmitter with different cable lengths), process connection, cable entry, power supply, current output/communication (HART, PROFIBUS, Analog), and additional features (fast temperature measurement, encapsulated Pt 100, MRS).

Accessories

• Cable Extension: CLK5 extension cable, VBM junction box.
• Pipe Mounting Kit: For installation on pipes and posts (max. Ø 60 mm / 2.36").
• Software Upgrade: For Remote Parameter Set Switching (MRS) and temperature coefficient determination.
• Optoscope: Interface for PC/laptop service with Scopeware software.
• Calibration Solutions: CLY11 series precision solutions.

Related Products

• Indumax H CLS52: Inductive conductivity sensor with fast response time and hygienic design.

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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