Original developers.
GMC Electrical, Inc. is the original developer of all-ceramic permanent reference electrodes and zinc–zinc sulphate reference electrodes.
GMC Electrical, Inc. / STAPERM™
STAPERM Reference Electrodes.
Precision Since 1984.
Find the right reference for your environment. Built by GMC Electrical, Inc. for accurate corrosion monitoring.
WHY GMC ELECTRICAL
Original thinking.
Precision you can trust.
Since 1984, GMC has focused on the details that matter: the materials inside, the accuracy of the reference, and the application it serves.
Analytical grade.
We use analytical-grade materials in our reference electrodes. Precision begins with the materials inside.
Tighter tolerances.
Built to laboratory specifications with tighter tolerances for accurate measurements.
Expertise since 1984.
Decades of reference electrode development and manufacturing inform the products we build and the guidance we provide.
The right reference.
From buried pipelines and concrete to freshwater, seawater and deep-water service, our range helps you select for the actual environment.
Details that fit your project.
Specify coupon area, wire length and configuration where available. Build a clear RFQ and discuss your requirements directly with GMC.
Explore the product specifications for model-specific performance details.
Explore STAPERM electrodes ↗THE STAPERM COLLECTION
Find your reference electrode.
Start with your environment. Find the STAPERM reference electrode for your project.
01 / APPLICATION
Underground
Permanent reference electrodes for buried installations.
02 / APPLICATION
Water Service
References for freshwater, seawater and deep-water environments.
03 / APPLICATION
Concrete
All-ceramic reference electrodes for concrete installations.
04 / APPLICATION
Thru-hull
Reference electrode assemblies for tanks and pressure vessels.
05 / APPLICATION
AC Mitigation
PCIR and coupons for AC mitigation assessment and CP monitoring.
06 / APPLICATION
Portable
Portable reference electrodes for field measurements and readings through concrete.
CU-7-PCIR-20CM²
CU-7-PCIR-100CM²
CU-7-PCIR-200CM²CU-7-PCIR-20CM² / WITH STATIONCU-7-PCIR-100CM² / WITH STATIONCU-7-PCIR-200CM² / WITH STATION
PCIR · 1 cm²PCIR · 1 cm²UNDERGROUND PCIR
10 cm²Electrode only
Photo coming soonUNDERGROUND PCIR
10 cm²With Smart Test Station
Photo coming soonUNDERGROUND / POROUS CERAMIC + COUPON
A CLOSER LOOK / PCIR & AC MITIGATION
PCIR.
More insight at the source.
Porous ceramic reference electrodes with integrated coupons for underground cathodic protection monitoring and AC mitigation assessment. Explore electrode-only configurations or assemblies with a Smart Test Station.
CU-7-PCIR-20CM² · Electrode only
View selected model ↗All coupon sizes & configurations +
COMPLETE YOUR PROJECT
Beyond reference electrodes.
All CP products +
STAPERM Reference ElectrodesAC Mitigation/CouponsImpressed Current AnodesSacrificial/Galvanic AnodesAnode ControllersWater Tank MaterialC.P. Test EquipmentC.P. Test StationsLine MarkersPin BrazingthermOweldRectifiersTools
TECHNICAL SUPPORT
Specify with confidence.
Explore technical resources or talk with our team about your application.