STAPERM / THE REFERENCE COLLECTION
Precision starts
with the right reference.
Explore by application. Find your chemistry.
Specify with confidence.
EXPLORE THE COLLECTION
Built for your environment.
Select a family to see its models and configurations.
Underground · Pre-packagedPermanent reference electrodes for buried installations.+
Need an all-ceramic electrode in a bag? Explore the CU-1-UGPC-B in a 3-inch bag for very arid or wet locations →
Ceramic · UndergroundAll-ceramic reference electrodes for permanent underground monitoring.+
STAPERM™ Model ZN-4-UGPC
Choose standard ceramic or a 3" pre-packaged bag for arid or wet soils on the product page.
Details & RFQ →
STAPERM™ Model CU-1-UGPC
Choose standard ceramic or a 3" pre-packaged bag for arid or wet soils on the product page.
Details & RFQ →
STAPERM™ Model AG-4-UGPC
Choose standard ceramic or a 3" pre-packaged bag for arid or wet soils on the product page.
Details & RFQ →ConcreteSmaller-diameter all-ceramic reference electrodes for concrete installations.+
Our concrete models use the same all-ceramic design in a smaller diameter. Select the chemistry specified for your project.
CONCRETE
CU-1-BD
View model details →Copper / copper sulfate
Smaller-diameter all-ceramic reference electrode for concrete installations.
CONCRETE
ZN-4-BD
View model details →Zinc / zinc sulfate
Smaller-diameter all-ceramic reference electrode for concrete installations.
CONCRETE
AG-4-BD
View model details →Silver / silver chloride
Smaller-diameter all-ceramic reference electrode for concrete installations.
Underground · PCIRReference electrodes with coupons for CP monitoring and AC mitigation assessment. Select chemistry, coupon area and assembly.+
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
More insight.
At the point
of measurement.
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 +
FreshwaterReference electrodes for freshwater service.+
SeawaterReference electrodes for seawater and deep-water service.+
Permanent seawater electrodes
Portable seawater electrodes
Need a through-wall installation? Explore the AG-6-TH silver / silver chloride thru-hull assembly →
Deep WaterDELTAPERM Apache reference electrodes for deep-water service.PortableReference electrodes for field measurements.+
Choose your chemistry below. CU-4-PT, ZN-4-PT, and AG-4-PT each offer round or pointed tips on the product page. PTH models are for readings through concrete.
PORTABLE REFERENCE ELECTRODES
Copper / copper sulfate
PORTABLE REFERENCE ELECTRODES
Zinc / zinc sulfate
PORTABLE REFERENCE ELECTRODES
Silver / silver chloride
AC Mitigation / CouponsChoose material, area, wire length and conductor count.+
GMC / AC MITIGATION & CORROSION COUPONS
The right coupon.
The right configuration.
Coupons for AC mitigation assessment and cathodic protection monitoring. Choose your material, exposed area and lead configuration.
Representative image with shortened leads for clarity. Exposed area and supplied wire length follow your selections.
CONFIGURE YOUR COUPON
Ductile iron coupon
Selected model details ↗GMC will confirm configuration and availability with your quotation.
GMC / PRODUCT COLLECTIONSelect the main image to view full size.
GMC Electrical, Inc. / PRODUCT DETAIL
STAPERM CU-1-BD
PART / SKU CU-1-BD
Copper / copper sulfate
Smaller-diameter all-ceramic permanent reference electrode for concrete and bridge-deck installations.
Request a quote for your project. Our team will confirm configuration, pricing, and availability.
Questions about this product? ↗The STAPERM CU-1-BD is an all-ceramic permanent reference electrode for concrete and bridge-deck applications. Its smaller diameter suits installations where space is limited.
Designed for concrete
The narrow ceramic body provides the permanent reference in a smaller format for concrete and bridge-deck monitoring. Chemistry-specific color identification helps distinguish models during installation.
Accuracy built into every electrode
Analytical-grade materials and tight acceptance tolerances support consistent reference measurements. Each chemistry is checked against a saturated calomel reference.
Reference chemistry
Copper / copper sulfate
| Model | CU-1-BD |
|---|---|
| Chemistry | Copper / copper sulfate |
| Application | Concrete and bridge decks |
| Construction | Smaller-diameter all-ceramic body |
| Cap identification | Yellow |
| Calibration reference | Saturated calomel electrode (SCE) |
| Acceptance tolerance | Within ±5 mV of the specified chemistry potential versus SCE |
| Materials | Analytical-grade electrode materials |
| Installation | Permanent placement in concrete |
GMC / PRODUCT COLLECTIONSelect the main image to view full size.
GMC Electrical, Inc. / PRODUCT DETAIL
STAPERM ZN-4-BD
PART / SKU ZN-4-BD
Zinc / zinc sulfate
Smaller-diameter all-ceramic permanent reference electrode for concrete and bridge-deck installations.
Request a quote for your project. Our team will confirm configuration, pricing, and availability.
Questions about this product? ↗The STAPERM ZN-4-BD is an all-ceramic permanent reference electrode for concrete and bridge-deck applications. Its smaller diameter suits installations where space is limited.
Designed for concrete
The narrow ceramic body provides the permanent reference in a smaller format for concrete and bridge-deck monitoring. Chemistry-specific color identification helps distinguish models during installation.
Accuracy built into every electrode
Analytical-grade materials and tight acceptance tolerances support consistent reference measurements. Each chemistry is checked against a saturated calomel reference.
Reference chemistry
Zinc / zinc sulfate
| Model | ZN-4-BD |
|---|---|
| Chemistry | Zinc / zinc sulfate |
| Application | Concrete and bridge decks |
| Construction | Smaller-diameter all-ceramic body |
| Cap identification | Red |
| Calibration reference | Saturated calomel electrode (SCE) |
| Acceptance tolerance | Within ±5 mV of the specified chemistry potential versus SCE |
| Materials | Analytical-grade electrode materials |
| Installation | Permanent placement in concrete |
GMC / PRODUCT COLLECTIONSelect the main image to view full size.
GMC Electrical, Inc. / PRODUCT DETAIL
STAPERM AG-4-BD
PART / SKU AG-4-BD
Silver / silver chloride
Smaller-diameter all-ceramic permanent reference electrode for concrete and bridge-deck installations.
Request a quote for your project. Our team will confirm configuration, pricing, and availability.
Questions about this product? ↗The STAPERM AG-4-BD is an all-ceramic permanent reference electrode for concrete and bridge-deck applications. Its smaller diameter suits installations where space is limited.
Designed for concrete
The narrow ceramic body provides the permanent reference in a smaller format for concrete and bridge-deck monitoring. Chemistry-specific color identification helps distinguish models during installation.
Accuracy built into every electrode
Analytical-grade materials and tight acceptance tolerances support consistent reference measurements. Each chemistry is checked against a saturated calomel reference.
Reference chemistry
Silver / silver chloride
| Model | AG-4-BD |
|---|---|
| Chemistry | Silver / silver chloride |
| Application | Concrete and bridge decks |
| Construction | Smaller-diameter all-ceramic body |
| Cap identification | Blue |
| Calibration reference | Saturated calomel electrode (SCE) |
| Acceptance tolerance | Within ±5 mV of the specified chemistry potential versus SCE |
| Materials | Analytical-grade electrode materials |
| Installation | Permanent placement in concrete |