Honeywell DL423 DirectLine® pH/ORP Sensor Module
The Honeywell DirectLine® architecture consists of an electronics module integral to the conductivity cell. This design eliminates the need and added cost of a separate analyzer or transmitter.
The electronics module is sealed in a plastic weather proof, corrosion resistant housing and is connected to the conductivity cell on one side and a 4-20 mA output cable on the other via water proof connectors. This housing design allows this system to be used in harsh environments where moisture and dust is a problem.
For special mounting applications, the remote mounting option connects the electronics module to the conductivity cell via a cable. The electronics module is then mounted on a 2-inch pipe, wall, or DIN rail.
• Direct 4-20 mA output eliminates need for dedicated analyzers or transmitters, simplifying installation, start-up, operation, and maintenance tasks. Installation costs are also reduced because standard cable can be used for additional cable distances.
• Automatic upload of cell constant and cell calibration factor from cell EEPROM reduces set-up time.
• Integral electronics with local HMI simplifies installation and shortens calibration times.
• Modular plug-in construction simplifies electrode replacements.
• Local display and keypad facilitates quick set-up, calibration, and operational activities.
• ½” NPT conduit connection provides increased protection and noise immunity of output cable
• Plug-in modular design allows sensor to be safely removed and replaced without cycling power on the electronics module.
• Electronics and sensor diagnostics reduces troubleshooting times.
• Trim value or 1-point solution calibration options accommodates individual calibration techniques and reduces calibration time.
• Temperature Sensor calibration options for more accurate measurements.
• Playing card-sized guide facilitates simple, correct, and consistent calibration and configuration.
• Watertight sensor connection for reliability in submersion applications.
• Global approvals including:
– CE Mark for industrial applications
– UL General Purpose
– CSA General Purpose
– IP66 Type 4x Enclosure
– FM Class I, Div. 1 (I.S.)
– FM Class I, Div. 2 (non-incendive field wiring)
| Display Ranges | Conductivity: 0 to 2000 μS/cm, 0 to 20.00 mS/cm, 0 to 1000 mS/cm Resistivity: 0 to 20.00 MΩ-cm Total Dissolved Solids (TDS): 0 to 2000 ppm, 0 to 2000 ppb, 0 to 200ppt % Concentration: 0 to 20.00% |
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| Displayed Temperature Range | –10 °C to +140 °C (14 °F to 284 °F) | |
| Display Accuracy | Conductivity/Resistivity: Greater of +/- 2 counts or +/- 0.5% of reading Concentration: +/- 0.5% of reading Temperature: +/- 0.1°C from –10 to 99.9°C, +/- 1°C from 100 to 140 °C |
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| Display Resolution | 4 digits, floating decimal point | |
| Process Temperature | –10 °C to +140 °C (14 °F to 284 °F) | |
| Electronics Module Ambient Temperature | –20 °C to +85 °C (–4 °F to +185 °F) | |
| Output Type | 4-20 mA (2-wire loop powered) | |
| Output Calibration | 4-20 mA | |
| Cell Constant and Cell Calibration Factor Input | Automatic from EEPROM in Conductivity Cell | |
| Output (Loop) Cable Connection | M12 Type | |
| Output (Loop) User Termination | Tinned leads on cord set or customer supplied cable | |
| Cable Lengths | Remote Sensor: | 20 feet (cable integral to conductivity cell) |
| Output: | 20 feet or 50 feet | |
| Power | 16-42 Vdc, 23mA max Maximum load resistance: 250 ohms at 16 Vdc 600 ohms at 24 Vdc 1400 ohms at 42 Vdc |
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| Local Display and Buttons | LCD 4-digit, 7-segment | |
| Engineering Units (Labels) | μS/cm, mS/cm, MΩ-cm, ppm TDS, ppb TDS, ppt TDS, % | |
| Calibration Options | Cal Trim Factor, 1 Point Cal Solution | |
| Solution Temperature Compensation | Acid (Cation/Ammonia), Salt (Neutral Salts), NaCl, HCl, NaOH, H2SO4, and None (for USP24 Conformance) | |
| Diagnostics | Sensor and electronics | |
| Case | Weatherproof, corrosion-resistant plastic housing | |
| Approvals | CE Mark for Industrial Applications UL – General Purpose for Process Control CSA General Purpose for Process Control FM Intrinsically Safe, Class I, Div. 1, Groups A, B, C, D and Class I, Zone 0, AEx ia IIC FM Class I, Div. 2, Groups A, B, C, D and Class I, Zone 2, Groups IIC Enclosure: Type 4x, IP66 |
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| Remote Mounting | Pipe, Wall, or DIN Rail | |
| Dimensions | H 123 mm (4.84") x W 48 mm (1.89") x D 46 mm (1.81") | |
| Weight | Approximately 142 g (5.0 oz.) | |
