Liquiline CM14

Summary

Product Identification

The Liquiline CM14 is a four-wire transmitter designed for panel or cabinet installation. It supports pH/ORP, conductivity, and oxygen measurements.

Applications:

• Wastewater treatment
• Water treatment and drinking water monitoring
• Ion exchangers
• Surface water monitoring

Key Features:

• Compact 48 x 96 mm panel-mounted housing
• Easy to use
• Memosens technology enabled
• Supports pre-calibrated sensors
• Active indication of cable break for safety
• Two contacts for limit switching
• Second current output available for temperature

Input

• Measured variables: pH value, ORP, conductivity, oxygen (dependent on connected sensor).
• Measuring ranges: Dependent on connected sensor.
• Types of input: Digital sensor inputs for sensors with Memosens protocol.
• Cable specification:
  • Cable type: Memosens data cable CYK10 or fixed sensor cable.
  • Max. cable length: 100 m (330 ft).

Output

• Output signal: 2 x 0/4 to 20 mA, active, galvanically isolated.
• Load: Max. 500 Ω.
• Linearization/transmission behavior: Linear.
• Alarm output: Open collector, normally closed, opens on fault.
  • Max. current: 200 mA.
  • Max. voltage: 30 V DC.
• Current outputs:
  • Span: 0 to 23 mA.
  • Signal characteristic: Linear.
• Relay outputs: 2 changeover contacts.
  • Switching capacity: max. 3 A @ 24 V DC / 253 V AC.
  • Minimum: 100 mW (5 V / 10 mA).

Electrical Specification

• Output voltage: Max. 24 V.
• Test voltage: 500 V.
• Cable specification (for outputs/relays): Max. 1.5 mm² (16 AWG) for signal, Max. 2.5 mm² (14 AWG) for relays.
• Power supply: Universal power supply 24 to 230 V AC/DC (±20 % / +10 %) 50/60 Hz.
• Power consumption: Max. 13.8 VA / 6.6 W.

Performance Characteristics

• Response time (current outputs): t90 = max. 500 ms for 0 to 20 mA.
• Reference temperature: 25 °C (77 °F).
• Measured error for sensor inputs: See documentation of the connected sensor.
• Current output resolution: > 13 bit.
• Repeatability: See documentation of the connected sensor.

Installation

• Mounting location: Panel mount, cutout 92 x 45 mm (3.62 x 1.77 in).
• Max. panel thickness: 26 mm (1 in).
• Orientation: Determined by display legibility; max. viewing angle range of ±45°.

Environment

• Ambient temperature: –10 to +60 °C (14 to 140 °F).
• Storage temperature: -40 to +85 °C (-40 to 185 °F).
• Humidity: 5 to 85 %, non-condensing.
• Operating height: < 2000 m (6561 ft) above MSL.
• Degree of protection:
  • Front: IP65 / NEMA 4X.
  • Casing: IP20.
• Electromagnetic compatibility: Interference emission and immunity as per EN 61326-1:2013, Class A for Industry.

Mechanical Construction

• Dimensions: 48 mm (width) x 96 mm (height) x 118.6 mm (depth).
• Weight: 0.3 kg (0.66 lbs).
• Materials:
  • Housing, casing: Polycarbonate.
  • Front foil: Polyester, UV-resistant.
• Terminals: Max. 2.5 mm² (22-14 AWG) for mains and relay connections (torque 0.4 Nm).

Human Interface

• Operating elements: LC display for measurements and configuration, status LEDs (power, alarm, relays), and operating keys.

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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