Global site

ABB's website uses cookies. By staying here you are agreeing to our use of cookies. Learn more

100 GP-D pH/ORP digital sensor

Providing complete confidence in general process applications

The 100 GP-D brings together digital EZLinkTM technology and durable performance into one efficient, cost-effective maintenance-free design.



Highly accurate with fast response times, the 100 GP-D provides complete confidence in a wide range of general process applications including drinking water, municipal wastewater and cooling waters.

The 100 GP-D sensor provides:

EZLink™  connectivity

  • Plug-and-play technology makes sensor integration fast and easy
  • Advanced diagnostics offering end-of-life indication and fault analysis
  • Improved measurement accuracy with digital communication

Increased efficiency

  • Propriety high performance glassware formulations provide the highest level of reliability and responsiveness
  • Close-coupled temperature measurement ensures high accuracy even with rapid temperature changes

Cost-effective and dependable

  • Enhanced double junction design with ion trap delays poisoning effects ensuring the sensor operates longer
  • Large surface PTFE junction provides excellent stability and fouling resistance
  • Robust PVDF ¾ inch NPT body provides superior mechanical and chemical resistance
  • Each electrode is manufactured to the highest quality standards and provided with a calibration certificate

Modular design

  • Universal ¾ inch NPT design for simplified mounting
  • Available in a range of detached or integral cabling options


Measurement range
pH 0 to 14 pH
Redox (ORP)  –2000 to 2000 mV
Process temperature 
–5 to 60 °C (23 to 140 °F)

Pressure range
0 to 6 bar (90 psi) @ 25 °C (77 °F)

Recommended minimum sample conductivity

50 μS/cm

pH glass
High performance (S) glass (bullet)
High performance (S) glass (flat)
Low temperature (LT) glass

Redox (ORP)

Reference system
Extended double junction Ag/AgCl design plus ion trap in gel matrix

Reference junction
Porous PTFE and Viton O-rings

Connection type

Process connections
¾ inch NPT

Approvals, certification and safety

  • CE Mark
    Covers EMC+LV directives (including latest version of EN61010)
  • Regulation 31
    Drinking water approval: Complies to DWI Regulation 31(4)(b)
    Additional tests: BS6920 parts 2.2 and 2.4 on all wetted parts
  • EMC
    Meets requirements of IEC61326 for an industrial environment


Loading documents


ABB offer a full range of services to support you and your processes, including:

Explore our comprehensive range of services at Measurement & Analytics service