Honeywell DirectLine DL424, User Manual, Page: 7 / 38

Introduction
1. Introduction
1.1 Overview
The DirectLine® Sensor for dissolved oxygen measurement in water consists of a
DL424/425 electronics module connected to a DL5000 DO Probe . The modular
electronics design allows the module to be separated from the probe, so that the
probe can be easily removed or replaced while retaining power to the electronics
module.
The DL424/425 electronics module is contained in a Nema Type 4x sealed
weatherproof corrosion/impact-resistant polysulfone housing. The Module can be
mounted as an integral unit directly connected to the probe or remotely using a
probe with a cable. The sealed plastic housing has plug-in connections for the
DL5000 probe and a 4-20 mA output connection.
Figure 1-1 DirectLine® Sensor
9/11 DirectLine® DL424/425 Sensor Module User Manual 1