DC Holiday Detector | Elcometer 266
Product Description
High Voltage Holiday Detector
Find pinholes, porosity and coating flaws fast — with a built-in voltage calculator that sets the correct test voltage automatically. Inspect protective coatings up to 7 mm (275 mils) thick on pipelines, tanks and more.
Adjustable Test Voltage
0.5 kV – 1 kV in 50 V steps
1 kV – 30 kV in 100 V steps
Set precisely from the keypad — no screwdriver required.
Probe Handle Required
This gauge requires one of the Probe Handles below to operate. Probe handles are sold separately — choose the handle that matches your voltage range and add it to your order.
Choose Your Probe Handle
The Elcometer 266 holiday detector tests porosity on coatings up to 7 mm (275 mils) thick and is ideal for inspecting pipelines and other protective coatings. Its built-in voltage calculator determines and sets the correct test voltage based on your chosen test standard and the coating thickness — eliminating guesswork and look-up tables.
Why Inspectors Choose the Elcometer 266
Automatic Voltage Calculator
Enter the test standard and coating thickness — the gauge sets the correct voltage for you. No look-up tables needed.
Precise Keypad Control
Adjust voltage from the keypad in fine steps. Sensitivity to current can be manually preset or automatically adjusted for partially conductive coatings.
Closed-Loop Accuracy
An internal voltmeter continuously measures and controls test voltage — accurate results in any climate.
Interchangeable Probe Handles
Choose 5 kV, 15 kV or 30 kV DC handles — plus a continuous-voltage option — to match the job. One gauge covers your full workload.
Audible & Visual Alarms
Bright handle LEDs and a loud alarm signal power on (Red) and every detected spark (Blue) — flaws never go unnoticed.
40 Hours of Runtime
Fully charged in 4 hours for up to 40 hours of continuous use. Charge packs in or out of the gauge.
Works With Your Existing Accessories
An optional adaptor enables accessories from other manufacturers, including Elcometer 236 & 136 and 780/785/790 series.
Large Backlit Display
Easy to read even in dark environments — the backlight flashes when a flaw is detected.
Optional Two-Handed Grip
An optional second hand grip adds control for testing pipes and tank floors — without compromising safety.
Multi-Language Menus
Easy, menu-driven operation displayed in multiple languages for versatile use across teams and sites.
Engineered for Safety
Dual Safety Switch
A 2-stage safety switch prevents accidental activation — release your grip and the handle switches off.
Protective Ribbing
Specialised ribbing protects the user and meets standard EN61010 — high voltage testing has never been safer.
Live Voltage Warning
The gauge speaker emits a clear ticking sound to indicate voltage is present at the handle.
Adjustable Alarm Volume
A loud spark alarm with adjustable volume stays audible even in the noisiest environments.
Specifications
| Technical Specifications - Elcometer 266 DC Holiday Detector | |||
| Part Number | Description | ||
| D266----4 | Elcometer 266* | ||
| High Voltage Output Accuracy | ±5% or ±50V below 1000 Volts | ||
| Operating Temperature | 0°C to 50°C (32°F to 120°F) | ||
| Power Supply | Rechargeable lithium ion battery, fully charged within 4 hours | ||
| Measured Current Flow Accuracy | ±5% of full scale Output Current:0 - 100µA maximum | ||
| Typical Battery Life - Backlight Off (On) | DC5: 40 (20) hours | DC15: 20 (15) hours | DC30: 10 (8) hours |
| Instrument Case Dimensions | Waterproof, ABS case; 520 x 370 x 125mm (20.5 x 14.5 x 5”) | ||
| Weight | Base unit (including battery pack): 1.2kg (2.7lb) Handle: 0.6kg (1.3lb) | ||
| Packing List | Elcometer 266 DC Holiday Detector, lithium battery, curly connection cable for high voltage handle, 10m (32’) signal return lead, battery charger with 3 mains cables (UK, EUR and US), band brush, shoulder strap, tough plastic carry case and operating instructions | ||
*The Elcometer 266 does not include the probe handle; please select the required handle the accessories
Data Sheet & Downloads
Safety Data
Accessories
| Accessories - Elcometer 266 DC Holiday Detector | |||
| DC5 (0 - 5KV) | DC15 (0 - 15kV) | DC30 (0 - 30kV) | |
| Elcometer 266 Probe Handle (Voltage)* | T26620033-1 | T26620033-2 | T26620033-3 |
| Second Hand Grip | T26620081 | ||
| Earth Signal Return Lead | 4m(13'): T99916954 | 10m(32'): T99916996 | |
For rolling springs, rubber or wire brush probes and other accessories click here.
Standards
Can be used in accordance with:
ANSI/AWWA C213, AS 3894.1, ASTM C 536, ASTM C 537, ASTM D 4787, ASTM G 6, ASTM D 5162-B, ASTM G 62-B, BS1344-11, DIN 55670, EN 14430, ISO 2746, JIS K 6766, NACE RP0274, NACE RP0188, NACE RP0190, NACE RP0490, NACE SP0188, NACE SP0490
Standards in grey have been superseded but are still recognized in some industries.
