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TPI AC Volt Testers. Determine the presence or absence of AC voltage without disconnecting the system in question.

50 AC Volt Tester
  • No switch required, always ‘on’ ready for use
  • Uses 2 AAA batteries (included)
  • UL listed
  • Lifetime warranty

Model Variations:

  • Model 40 (low voltage): Red glow indicates presence of 24-90 V
  • Model 50: Audible buzzer and visual alarm, red glow indicates presence of 50-1,000 V

$22.95 USA Suggested List Price

Digi-Key Electronics
Where to Buy TPI Products

The TPI AC Volt 40 is essential to anyone determining the presence or absence of electrical voltage between 24-90 VAC. Use the TPI 40 for checking lawn irrigation equipment, thermostat controls, vending machine changers, and other low voltage equipment.

The TPI AC Volt 50 is a hand held device for determining the presence or absence of AC voltage in insulated wires, wall receptacles, fuses, junction boxes, switches, and any other voltage carrying electrical system. It is not necessary to disconnect the system in question because no contact is required for operation and current flow is not necessary to locate voltage. Simply touch the plastic tip to a connection point or move it along an insulated wire. If AC voltage is present, The AC Volt 50 will sound an audio alert and an LED light in the probe tip will glow bright red. The illumination will stop at a break in the circuit or wire, and this allows the AC sensor to be used as a troubleshooting instrument.


 Model 40/50 Specifications
 40 Non-Contact Voltage  24-90 VAC
 Power Supply  2 AAA Batteries

Model 40 AC Volt Tester Demonstration Video

Model 50 AC Volt Tester Introduction Video

Model 50 AC Volt Stick Demonstration Video

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

AC Volt Tester Manuals

AC Volt Series Data Sheet

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