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EXTECH CT20 Continuity Tester

The Extech CT20 is a remote continuity tester optimized for efficient wire and cable identification, suitable for both local and remote testing environments. It features a bright flashing LED and a loud pulsating beeper for immediate continuity indication. The device allows a single user to identify up to three wires simultaneously with a bi-color (red/green) LED remote probe, ensuring correct wiring and reducing repeated trips. Polarity verification is performed through a 20mA DC pulse, preventing false readings and ensuring precise identification. Compact and lightweight, it comes with test leads, alligator clips, a 9V battery, and a pouch for portability. Ideal for long-distance wiring, it supports cable lengths up to 10,000 feet with minimal gauge of 26, offering high versatility and ease of use in electrical troubleshooting and wiring projects.

Authorized Distributors
Source:Newark
Part No:CT20
Stock:8
Inv Date:06-05-2026
Price: Unit price: $47.99
Buy/RFQ:
Part No:CT-20
Stock:0
Inv Date:06-06-2026
Price: N/A
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Part No:CT20
Stock:13
Inv Date:06-06-2026
Price: Unit price: $47.99
Buy/RFQ:
Part No:CT-20
Stock:0
Inv Date:06-06-2026
Price: Unit price: $0.37
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Part No:CT20
Stock:0
Inv Date:06-06-2026
Price: Unit price: $124.93
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Source:DigiKey
Part No:CT20
Stock:10
Inv Date:06-05-2026
Price: Unit price: $115.677
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Source:DigiKey
Part No:CT20
Stock:33
Inv Date:06-05-2026
Price: Unit price: $47.99
Buy/RFQ:
Part No:CT20
Stock:10
Inv Date:06-05-2026
Price: Unit price: $47.99
Buy/RFQ:
Part No:CT20
Stock:0
Inv Date:06-05-2026
Price: Unit price: $56.99
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Authorized Distributors
Part No:CT20
Stock:0
Inv Date:06-05-2026
Price: Unit price: $80.49
Buy/RFQ:
Part No:CT20
Stock:4
Inv Date:06-05-2026
Price: Unit price: $49.47
Buy/RFQ:
Part No:CT20
Stock:0
Inv Date:06-05-2026
Price: Unit price: $47.99
Buy/RFQ:
Part No:CT20
Stock:5
Inv Date:06-05-2026
Price: N/A
Buy/RFQ:
Part No:CT20
Stock:0
Inv Date:06-05-2026
Price: Unit price: $80.49
Buy/RFQ:
Part No:CT20
Stock:4
Inv Date:06-05-2026
Price: Unit price: $49.47
Buy/RFQ:
Part No:CT20
Stock:3
Inv Date:06-05-2026
Price: Unit price: $43.23
Buy/RFQ:
Part No:CT20
Stock:0
Inv Date:06-05-2026
Price: N/A
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EXTECH CT20 Continuity Tester Specifications:

  • Dimensions: 3.6x2.2x1.14 inches (90x57x29mm)
  • Weight: 9.2 ounces (260g)
  • Supports wire lengths up to 10,000 feet (3,000 meters)
  • Minimum wire gauge: 26 AWG
  • Polarity check with 20mA DC pulse
  • Remote probe with bi-color LED (red/green)
  • Visual and audible continuity indicators
  • Complete with remote probe, test leads with alligator clips, 9V battery, and pouch
  • Lightweight, pocket-sized design for portability
  • Suitable for local and remote wire testing, ideal for electrical applications

Buy the Extech Series Continuity Tester Pro: CT20

Order the Extech CT20 online today and experience efficient wire and cable testing with remote identification, bright LED indicators, and a lightweight design. Perfect for electricians and technicians, this continuity tester ensures quick, accurate results and helps prevent wiring errors with easy-to-use features, including a bi-color remote probe, audible alerts, and support for long cable runs up to 10,000 feet. Compact and durable, it is an essential tool for reliable electrical troubleshooting and wiring projects.

Get Extech CT20 today—built for precise wire identification and long-distance testing.

Frequently Asked Questions

Where can I buy EXTECH CT20?

You can click on the BUY or RFQ button to purchase CT20 from an authorized EXTECH distributor.

How do I troubleshoot issues or seek technical support for part CT20?

You can download the CT20 datasheet or visit the EXTECH website for support.

Who is the manufacturer of CT20?

EXTECH

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