DL423 Conductivity Transmitter
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DirectLine® DL423 Contacting Conductivity (CC) Transmitter modules are next-generation analytical transmitters that combine the latest in microelectronics technology and unique modular design with the proven performance of Honeywell’s unique sensing technologies. The analytical transmitter provides unequaled savings during installation, startup, operation and maintenance. ​​

DirectLine DL423 Contacting Conductivity Transmitter is designed for outside use where moisture, dust and chemical attack may be present.  The analytical transmitter modules are intrinsically safe in a weatherproof, corrosion-resistant sealed composite enclosure, and are ideal for light industrial applications. Watertight sensor connection ensures reliability in submersion applications.

The analytical transmitter easily integrates into any loop powered monitoring or control system. Its compact, plug-in modular design saves space, and simplifies electrode replacement. 

A playing card-sized guide is provided for simple, correct, and consistent calibration and configuration. Integral electronics with local HMI simplifies installation and shortens calibration times.

An IP68 probe cable connector for remote measurement applications assures integrity of the Cell to the analytical transmitter hook up.

​The DL423 Contacting Conductivity Module accepts a conductivity input from a DL4000 DirectLine conductivity cell.  The module houses the electronics in a weatherproof plastic housing. The display and three button interface allows for fast set-up and operation. 

The 4-20 mA output cable easily connects to the module for easy wiring. All DL4000 conductivity cells are remotely mounted, and connected to the electronics module to the conductivity cell via a cable. The module can be mounted on a 2-inch pipe, wall or DIN rail.

​The DirectLine DL423 Contacting Conductivity Transmitter eliminates the need for dedicated analyzers or transmitters, thereby simplifying installation, start-up, operation, and maintenance tasks. Installation costs are also reduced because standard cable can be used for additional cable distances. Further cost savings are ensured through accurate measurement resulting in extended plant life for light industrial applications.

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DirectLine Sensor Module, 51-52-16-71-Issue 24DirectLine Sensor Module, 51-52-16-71-Issue 2450.86 KBModel Selection Guide1 Jan 2015
DirectLine DL1000 Electrode Mountings, 51-52-16-72-Issue 19DirectLine DL1000 Electrode Mountings, 51-52-16-72-Issue 1967.5 KBModel Selection Guide1 Jan 2015
DirectLine DL4000 Conductivity Mountings, 51-52-16-80-Issue 15DirectLine DL4000 Conductivity Mountings, 51-52-16-80-Issue 1532.26 KBModel Selection Guide1 Jan 2015
DirectLine Sensor Module, 51-52-16-71DirectLine Sensor Module, 51-52-16-7150.85 KBModel Selection Guide7 May 2014
Smart Sensors and Analytical Instruments BrochureAnalytical brochure - measurements for pH, ORP, conductivity/resistivity, dissolved oxygen and hydrogen purity.1.55 MBBrochure22 Apr 2014
Field Products Brochure for Power IndustryHoneywell offers a complete range of innovative products to meet application requirements in the power and energy markets.4.28 MBBrochure5 Nov 2013
DirectLine DL4000 Conductivity Sensor, 51-52-16-80DirectLine DL4000 Conductivity Sensor, 51-52-16-8031.96 KBModel Selection Guide29 Oct 2013
Field and process instrumentation and controller solutions for the pulp and paper industry brochure Learn how Honeywell's transmitters, flow meters, controllers and analytical instrumentation solve problems for the pulp, paper and printing industry.3.45 MBBrochure10 Jun 2012
Improving Power Plant Efficiency and Extending Equipment Life Brochure on how analytical instruments can improve power plant efficiency.1.04 MBBrochure30 Sep 2011
Remote Analytical Measurements Use wireless networking to gather remote analytical measurements 454.88 KBSolution Note6 Feb 2008
Public Support Documentation
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DirectLine® DL423 Sensor Module, 70-82-25-112for Conductivity/Resistivity Measurements User Manual 364.06 KBSupport Manual6 Feb 2018
DL423_EU DeclarationEuropean Union Declaration of Conformity308.57 KBSupport Document10 Aug 2016
Hazardous Substance Disclosure. UDA2182, Direct Line 42x, APT2000/4000 China RoHS Disclosure. Hazardous Substance Disclosure Table. Analyzers, Transmitters: English/Chinese443.11 KBSupport Document24 Jun 2016
Honeywell DirectLine Contacting Conductivity Transmitter Users manual, 70-82-25-112-DEDirectLine DL423 User Manual470.25 KBSupport Manual1 Jan 2003

Training, maintenance and support are critical aspects to consider when choosing a technology partner.  Honeywell offers world-class training through our Automation College, as well as comprehensive maintenance and support services designed to leverage your physical and intellectual assets and help you sustain and increase their value and performance over time.​

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