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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

  • Refillable electrode that never needs replacement
  • 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

The d-phi Series is fully submersible up to 100 psi

Model D-phi-s/i

Standpipe

Model D-phi-s has a 3/4″ NPT thread for standpipe mounting.

Model D-phi-s

Inline

Mount model D-phi-i inline up to 100psi with the built-in 1″ NPT thread.

Model D-phi-i

Additional Resources

pH Sensor Mounting Options

pH Sensor Inline and Standpipe Mounting Guide

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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