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EXTECH CT40 Wiring Tester Multimeter

The Extech CT40 is a comprehensive wiring tester and multimeter combination designed for electrical troubleshooting. It features a remote transmitter and receiver setup, enabling a user to identify up to 16 wires remotely, saving time and effort. The multimeter functions include AC/DC voltage and current measurements, resistance testing, diode testing, and continuity checks, with high accuracy. It supports wire voltage checks from 5 to 16 VDC and offers data hold and max hold features, auto power-off, and low battery indicators. Safety rated CAT II 600V, this device is ideal for professional electricians and technicians for efficient circuit diagnostics.

Authorized Distributors
Part No:CT-40
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Inv Date:06-06-2026
Price: Unit price: $0.836
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Part No:CT40
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Inv Date:06-06-2026
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Part No:CT40
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Inv Date:06-06-2026
Price: Unit price: $109.99
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Part No:CT40
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Inv Date:06-06-2026
Price: Unit price: $109.99
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Part No:CT40
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Inv Date:06-05-2026
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Part No:CT40
Stock:0
Inv Date:06-06-2026
Price: Unit price: $130
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EXTECH CT40 Wiring Tester Multimeter Specifications:

  • Display: 2000 count, basic accuracy 10%
  • DC/AC Voltage: 0.1mV to 600V
  • DC/AC Current: 0.1uA to 200mA
  • Resistance: 0.10% to 20MΩ
  • Diode Test: Yes
  • Continuity Test: Yes
  • Dimensions: 6.3 x 2.9 x 4.7 inches (162 x 74 x 120 mm)
  • Weight: 10.8 oz (308 g)
  • Transmitter Display: No LED lamps
  • Transmitter Test Leads: 4 alligator clips (16 red, 1 black round)
  • Cable Resistance: ≤ 0kΩ
  • Receiver Display: 2-digit blue LED
  • Test Leads: 2 alligator clips (red and black)

Buy the Buy Extech CT40 Part Number CT40 Online

Order the Extech wiring tester and multimeter online to streamline electrical troubleshooting. This versatile device combines wire identification, AC/DC voltage and current measurement, resistance, diode, and continuity testing in one compact kit. Its remote transmitter allows identification of up to 16 wires, making circuit diagnostics more efficient. Features include data hold, max hold, auto power-off, and low battery indicators, with safety rated CAT II 600V. Ideal for electricians and technicians seeking reliable, comprehensive circuit testing tools.

Get Extech CT40 today—designed for reliable electrical testing and wire identification with remote capabilities and advanced multimeter functions.

Frequently Asked Questions

Where can I buy EXTECH CT40?

You can click on the BUY or RFQ button to purchase CT40 from an authorized EXTECH distributor.

How do I troubleshoot issues or seek technical support for part CT40?

You can download the CT40 datasheet or visit the EXTECH website for support.

Who is the manufacturer of CT40?

EXTECH

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