Proudly made in the USA, Knopp offers two varieties of voltage testers.
K-60 Knopp Voltage Tester for AC and DC with polarity indicator. Double safety indication is by solenoid and by neon lamp.
Knopp’s low impedance Voltage Tester offers portability and ease of use with full protection. These exceptionally versatile and useful tools are backed by a reputation for quality in the design and manufacture of electrical test equipment
Knopp Voltage Testers are designed and built with safety, the key criteria! Dual voltage indication is provided by solenoid and neon lamp, operating independently. The lamp gives a bright warning signal. Voltages are shown by a positive, easy-to-read, moving indicator. There is a signal by hum and vibration; and the user is protected by high-grade, properly applied insulation, and by separation of incoming leads (the do not cross over each other within the housing). Interior separation of the circuit is a basic design feature of the case.
The Knopp 4E2-1 Voltage Tester is designed to detect electrical potential (voltage) between the third rail and ground on high voltage electrified transit systems. Two, redundant neon bulbs are used to indicate the presence of voltage.
The prod handle and the tester housing are both made from moisture- and oil-resistant laminated phenolic. The prod tips are made from stainless steel. The tester housing includes a rubber hand guard to guide the operator in proper placement of his or her hand. There are no exposed metal parts other than to the two prod tips. All internal connections are soldered.
The 4E2-1 tester uses two independent circuits to detect the presence of voltage. This provides double safety protection for the operator. The neon indicating lamps are mounted in specially shielded cavities within the instrument so that the neon glow indication can be unmistakably seen – even under the most adverse conditions of bright, direct sunlight on the instrument during tests.