Santronics 3115 AC Voltage Sensor
These AC/DC Voltage Detectors from Santronics are ideal for just about any application. Simply touch the tic tracer's tip to a terminal strip, outlet, or supply cord, and when the tip glows red, you know that voltage is present. Their compact design makes them easy to transport and keeps them readily available for use on a jobsite. Each tic tester gives you visual or audio indications of power detection, and needs no contact with conductors to be activated. Compact "pen-sized" design for easy transport and accessibility Constructed of non-conductive polycarbonate for additional safety Covered by one or more of the following patents 6,828,767 & 5,103,165 UL 1436 Made in the USA Ideal for use in: Service, maintenance Automotive Electricians Telecommunications Aviation Trucks/RV's Marine Industrial Controls Office Equipment [custom1] Cable Certification CAT III (UL), CAT IV (TUV) Outer Surface Non-conductive body, probe and cap composed of injected molded high-impact nonflammable polycarbonate, with dielectric of 220 Volts AC potential at 60 Hertz Operating Voltage 50-1000 Volts AC Batteries  Operating Temperature -20°C to +55°C Circuit Board Surface mounted components on FR-4 substrate Light Source One high-intensity LED for maximum illumination Weight 39.7 grams with batteries Dimensions 5.75" in length; .75" in diameter Breakdown Voltage 4000+ Volts AC Test Lead Wire n/a Tip Material n/a Interior Conductor Strip Brass strip approximately 4.75" in length Operating Principle This instrument senses an electrical field produced by AC voltage, through insulation and without touching the conductor. A constant bright red glow at the tip of the sensor will indicate the presence of voltage.