Item Total = $0.00 
Items = 0 
View Cart
United States
1-800-323-4340 or 
log in or register
Home  > 
Discontinued Items >
Sorry, this item is now discontinued.browse similar itemsor Contact us for more information.

Differential pH electrode

Mfr# ECFP21A1A1  |   Item# EW-56715-50

$738.25 USD/EACH


  • Direct replacements for GLI differential electrodes
  • Built-in preamplifier eliminates high-impedance wiring problems
  • Large reference reservoir extends time between preventive maintenance
The differential pH and ORP electrodes are ideal for industrial applications. Differential measurement technology minimizes ground loop interferences that can affect standard electrodes. In addition, a built-in pre-amplifier allows cable extensions up to 300 feet. Replaceable heavy-duty quad junction salt bridges and refillable reference solution extend the life of the sensor in severe applications, reducing the cost of ownership.

Electrodes have 1-1⁄2" NPT(M) threadson both ends for in-line or submersible mounting. A 300 Ω NTC temperature sensor allows the electrodes to be used as direct replacements for existing GLI electrodes.
Product Type pH Electrode
Reference electrolyte Standard cell solution
Reference PVDF and ceramic, double junction
Range 0 to 14
Temp range 23 to 203F (-5 to 95C)
ATC element 300 Ohm NTC
Pressure tolerance 100 psig at 212F (100C)
Material CPVC
Connector Tinned Ends
Thread size 1-1/2" NPT(M)
Diameter 1.90" (48mm)
Length 6.01" (153mm)
Cable length Integral 10ft (3m)
Manufacturer number ECFP21A1A1


at $59.00 USD/EACH

Available for order
or call 1-888-358-4705 to order

Technical Resources
Service & Support
Still have questions
Contact Our Experts
for FREE product
application selection
and support.
or call 1-800-323-4340
Custom Ordering Solutions
Custom Ordering Solutions
Let us find the exact product you need. We have access to suppliers full lines - for products beyond what you see here. Call 1-800-323-4340 Option 8 ext. 138-8456
Questions and Answers
Product Reviews