Elcometer 266 DC Holiday Detector Probes & Electrodes

Elcometer 266 DC Holiday Detector Probes & Accessories

Select the Right Probe for Reliable Holiday Detection

The Elcometer 266 DC Holiday Detector can be configured with a wide range of interchangeable probe handles, brushes, pipe probes, rolling springs and extension rods. Selecting the correct probe helps ensure complete contact with the coating surface so that holidays, pinholes, cracks, thin spots and other coating discontinuities can be reliably detected.

Probe selection depends primarily on the test voltage, surface size and geometry, coating type and accessibility. Options are available for flat surfaces, complex shapes, internal and external pipe inspection, large coated areas and surfaces where a softer contact material is preferred.

Interchangeable High-Voltage Probe Handles

The Elcometer 266 instrument is designed to operate with interchangeable high-voltage handles. Selecting a different handle changes the maximum available DC test voltage, allowing the detector to be configured for different coating thicknesses and inspection requirements.

Four probe-handle configurations are available, covering maximum outputs of 5 kV, 15 kV and 30 kV. The DC30S version provides continuous 0.5 – 30 kV DC output. Certified versions of each handle are also available.

 

 

Elcometer 266 Probe Handle Options

Part Number	Probe Handle	Voltage Range
T26620033-1	DC5 Probe Handle	0.5 – 5 kV
T26620033-2	DC15 Probe Handle	0.5 – 15 kV
T26620033-3	DC30 Probe Handle	0.5 – 30 kV
T26620033-4	DC30S Continuous Voltage Probe Handle	0.5 – 30 kV

Calibration-certified versions are available as part numbers T26620033-1C, T26620033-2C, T26620033-3C and T26620033-4C.

Band Brush Probes for General Inspection

The band brush probe is a versatile choice for general holiday detection and is particularly useful in small areas and on complex surfaces. Its flexible brush configuration helps maintain contact when inspecting shapes that would be difficult to cover effectively with a wide, rigid electrode.

Part Number	Description
T99919975	Band Brush Probe
T99922751	Phosphor Bronze Brush Probe

Wide Probes for Large Surface Areas

Wire brush and conductive rubber probes are available for inspecting larger coated surfaces. Their wider contact area allows the operator to cover more surface with each pass, improving inspection efficiency on tanks, panels, floors and other broad surfaces.

A conductive rubber probe is particularly useful when testing coatings that are more susceptible to scratching, as it provides electrical contact without the more aggressive action of a wire brush.

Specialized Probes for Pipe Inspection

Elcometer offers several probe styles specifically designed for inspecting protective coatings on pipes and pipelines. The appropriate configuration depends on whether the inside or outside of the pipe is being tested and on the pipe diameter.

Internal Pipe Brush Probes

Circular wire brush probes are designed to inspect the internal coating of pipes. The brush should be selected to closely match the internal diameter so that the electrode maintains contact around the coated circumference without leaving untested gaps.

Probe extension rods can be added when the inspection area is beyond the operator’s normal reach.

C-Type External Pipe Brushes

The lightweight C-Type wire brush is designed to sweep around the outside of coated pipes. Its open design makes it particularly useful where valves, inspection hatches or other obstructions prevent a complete rolling spring from travelling freely along the pipe.

Rolling Spring Probes

For rapid inspection of long external pipe sections, a rolling spring can be wrapped around the coated pipe and rolled along its length. This provides continuous contact around the circumference and allows large sections of pipeline to be inspected efficiently.

Rolling springs are available in different materials and sizes to suit the pipe diameter and inspection application.

Extension Rods for Difficult-to-Reach Areas

Compatible probe extension rods allow the Elcometer 266 electrode to reach deeper into pipes or access coated surfaces where direct inspection would otherwise be difficult.

Part Number	Description
T99919988-3	Probe Extension Rod – 250 mm (9.8 in)
T99919988-1	Probe Extension Rod – 500 mm (20 in)
T99919988-2	Probe Extension Rod – 1000 mm (39 in)

Universal Adaptors for Existing Holiday Detector Accessories

Accessory adaptors are available to allow the Elcometer 266 to accept a range of probes and accessories originally designed for other holiday detector systems. This can be particularly useful for inspectors who already own specialized electrodes and want to continue using them with the Elcometer 266.

Part Number	Compatibility
T99920084	Adaptor for AP, APS, AP/S1, AP/S2, AP/W, 10/20, 14/20, 10, 20 and 20S accessories
T99920083	Adaptor for P20, P40, P60, 780, 785 and 790 accessories
T99920252	Adaptor for PHD 1-20 and PHD 2-40 accessories
T99922747	Adaptor for 4S, 4.0, 8.0 and 35 accessories
T99920082	Adaptor for current range to fit older accessories

Key Features

• Wide selection of probes for Elcometer 266 DC holiday detection
• Interchangeable 5 kV, 15 kV and 30 kV probe handles
• Continuous DC30S 0.5 – 30 kV handle available
• Certified probe-handle versions available
• Band brushes for general-purpose and complex-surface inspection
• Wide wire brushes for efficient inspection of large surfaces
• Conductive rubber probes for coatings susceptible to scratching
• Internal circular brushes for coated pipe interiors
• C-Type brushes for external pipe inspection
• Rolling springs for rapid inspection of long pipeline sections
• Extension rods for difficult-to-reach surfaces and pipe interiors
• Accessory adaptors available for compatibility with other holiday detector probes
• Second hand grip available for improved control during two-handed inspection

Choosing the Correct Probe

Application	Recommended Probe Type
Small or complex surfaces	Band brush probe
Large flat surfaces	Wide wire brush or conductive rubber probe
Scratch-sensitive coatings	Conductive rubber probe
Inside coated pipes	Circular internal pipe brush
Outside pipes with valves or obstructions	C-Type wire brush
Long unobstructed external pipe sections	Rolling spring probe
Deep or difficult-to-reach locations	Probe with extension rod

Q&A

Does the Elcometer 266 include the high-voltage probe handle?

No. The Elcometer 266 main instrument does not include the high-voltage probe handle. The appropriate DC5, DC15, DC30 or DC30S handle should be selected according to the required test-voltage range.

Which probe is best for general holiday detection?

The band brush is a versatile general-purpose option and works particularly well on small areas and complex surfaces. The best electrode ultimately depends on the geometry and size of the surface being inspected.

Which probe should be used on a coating that could be scratched?

A conductive rubber probe is a useful choice for coatings susceptible to scratching because it provides the required electrical contact while being less aggressive than a wire brush electrode.

How do I choose an internal pipe brush?

Select a circular brush large enough to fit closely against the internal coated surface. Maintaining contact around the circumference is important because gaps between the brush and coating can result in areas not being properly inspected.

What is the best probe for quickly testing the outside of a long pipeline?

A rolling spring is designed for this application. It wraps around the external circumference of the pipe and rolls along the coating as the operator moves, providing rapid coverage of long unobstructed pipe sections.

When is a C-Type pipe brush preferable to a rolling spring?

A C-Type brush is particularly useful when valves, inspection hatches or other obstacles prevent a rolling spring from travelling continuously along the outside of the pipe.

Can probes reach deep inside a pipe?

Yes. Compatible 250 mm, 500 mm and 1000 mm extension rods can extend the reach of suitable probes for internal pipe inspection and other difficult-to-access areas.

Can existing holiday detector accessories be used with the Elcometer 266?

In many cases, yes. Elcometer offers several universal accessory adaptors designed to connect the Elcometer 266 to compatible probes and accessories from other holiday detector ranges.

* The Elcometer 266 does not include the probe handle; please select the required handle from the accessories

Certificate: Optional Calibration Certificate available.

Standards

ANSI/AWWA C213, AS 3894.1, ASTM C 536, ASTM C 537, ASTM D 4787, ASTM D 5162-B, ASTM G 62-B, BS1344-11, DIN 55670, EN 14430, ISO 2746, ISO 29601, JIS K 6766, NACE RP0274, NACE RP0188, NACE RP0190, NACE RP0490, NACE SP0188, NACE SP0490