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The D-pHi Series™
4-20 mA Differential pH Sensor
The D-phi Series re”D-phi”nes accuracy, reliability, and ease-of-use for pH sensors.
Avoid headaches and wasted money with features that eliminate common installation and maintenance problems. This pH sensor has an extremely stable differential electrode that “D-phies” dilution and debris build-up. It also has a fast response time (96% accurate in less than 5 seconds) and cannot be poisoned by chemicals. Lastly, the sensor is designed for 10+ years of service and the electrode never needs replacement.
Order now to enjoy less maintenance and lower expenses for your business.
Applications
Recommended for process control, wastewater, aquaculture, hydroponics, environmental remediation, and other applications requiring extremely stable, user-friendly, and low-maintenance pH monitoring.
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Features
- Linear 4-20 mA output
- Simple to use and easy to calibrate
- Accurate over long distances
- Compatible with wide variety of dataloggers, PLCs, SCADA, and IoT systems.
- 2-wire connection with Reversible Input Protection
- 600 VDC electrical isolation
- Differential electrode technology (Click to learn more)
- Refillable electrode that never needs replacement
- 1-min refill procedure every 1-2 months for continuous reliable performance
- Reduces the need for frequent calibration checks and recalibrations, leading to lower maintenance overall
- Estimated maintenance cost of $36-85 USD per year
- Click to view Reference Refill Kit
- Chemical-resistant titanium and Delrin® housing (PVDF available)
- Built-in 0-50°C temperature sensor (secondary 4-20 mA output)
- 3/4″ or 1″ NPT backend (depending on model)
- Fully submersible to 100 psi and 150°F
- Dry storage
- Automatic Temperature Compensation (ATC)
Submersion |
Standpipe |
Inline |
Additional Resources
pH Sensor
| pH Range | 0-14 pH |
| Output | 4-20 mA | 2-wire |
| Electrode Type | Differential |
| Wetted Materials | Delrin®, titanium, glass, Viton™ |
| Operational Temperature Range | 32-155°F (0-70°C) |
| Thread Type | 3/4 inch MNPT or 1 inch MNPT |
| Max Flow Rate | 10 ft per second |
| Pressure Range | 0-100 psi |
| Automatic Temperature Compensation | 32-155°F (0-70°C) |
| Power Supply Voltage | 8-40 VDC |
| Warm-up Time | 2 seconds |
| Response time | 96% < 5 seconds |
| Length | 9.25 in (23.5 cm) |
| Width | 1.00 in (2.54 cm) max. |
| Weight (No cable) | 0.50 lbs (0.227 kg) |
| Linearity | ±0.014 pH* |
| Accuracy | ±0.014 pH* |
| Sensitivity | ±0.01 pH |
*After proper calibration
Cable
| Cable Material | Polyurethane |
| Type | Kevlar® reinforced, water blocked, shielded, twisted-pair wiring |
| Maximum Distance | 3 miles |
| Resistance per 1000 ft (304.8 m) | 26 Ohms |
| Replaceable? |
No |
pHionics products comply fully with all applicable EU Directives to bear the CE Mark.
Delrin® and Kevlar® are registered trademarks of DuPont™.
Viton™ is a trademark of Chemours.
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