TAILIEUCHUNG - Honeywell

DirectLine® DL421/422 for Durafet® II ® pH and Meredian II pH/ORP electrodes is a family of sensors released by Honeywell as part of a new generation of analytical measurement. The DirectLine sensor’s unique architecture combines the latest in microelectronics technology with the proven performance of Durafet® II solid ® state pH sensors, or Meredian II glass electrodes, to provide unequaled savings during installation, start-up, operation, and maintenance. The DirectLine® electronics module can mount integrally on the pH/ORP electrode and provide a 4-20 mA dc output proportional to pH. The output of the DirectLine® sensor connects directly to any host. | Honeywell DL421 422 DirectLine Sensor for Durafet II and Meredian II pH ORP Electrodes 70-82-03-40 1 03 Page 1 of 8 Specification Overview DirectLine DL421 422 for Durafet II pH and Meredian II pH ORP electrodes is a family of sensors released by Honeywell as part of a new generation of analytical measurement. The DirectLine sensor s unique architecture combines the latest in microelectronics technology with the proven performance of Durafet II solid state pH sensors or Meredian II glass electrodes to provide unequaled savings during installation start-up operation and maintenance. The DirectLine electronics module can mount integrally on the pH ORP electrode and provide a 4-20 mA dc output proportional to pH. The output of the DirectLine sensor connects directly to any host monitor or control device that accepts standard 4-20 mA inputs and provides external loop power including Honeywell UDC3300 1 4-DIN Controller UMC800 Controller PLCs with analog inputs DCS systems A host of recorder controller products For electrode submersion or special mounting applications the electronics module is also available in a remotemounting configuration. Description The Honeywell DirectLine architecture consists of an electronics module integral to the electrode. This design eliminates the need and added cost of a separate analyzer or transmitter. The electronics module is sealed in a plastic weatherproof corrosionresistant housing and is connected to the pH ORP electrode on one side and a 4-20 mA output cable on the other via waterproof connectors. This housing design allows this system to be used in harsh environments where moisture and dust is a problem. Figure 1 DirectLine DL421 Sensor Description continued For submersion or special mounting applications the remote mounting option connects the electronics module to the electrode via a cable. The electronics module is then mounted on a 2-inch pipe wall or DIN rail. Features Direct 4-20 mA output eliminates need for dedicated .

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