Voltage Detector
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 Non Contact AC Voltage Detector 90V 1000V Pen Stick  US $3.27
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 Non Contact Voltage Detector 90 1000V AC Pen Stick US $3.38
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 Non Contact Voltage Detector AC 90 1000V Tester Pen New US $3.95
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 Non Contact AC Voltage Detector Electric Pen 90 1000V US $4.99
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 Non Conductive Voltage Detector Tester 90 600V AC Pen US $10.59
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 Compact Pen Multimeter Non contact AC Voltage Detector US $38.78
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Hioki 3120-TED Non-Contact Voltage Detector List Price: $14.95 Sale Price: $17.99  |
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* Top "primary supply level" safety class rating for voltage detectors CAT IV 600V design meets CE Mark qualifications. === Includes: 2 - AAA manganese (R03) batteries --- Specifications: Measurement Function: Voltage Detection (for 100V Installations) Voltage Range: AC 70 to 600 V, 50/60 Hz (when touching insulated wiring equivalent to IV2mm2 Indication: Red LED and continuous beeping sound Battery Check: Green LED Power supply: AAA manganese(R03) or alkaline(LR03) batteries × 2 Rated Voltage: DC 3... |
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Greenlee GT-16 Adjustable Non-Contact Voltage Detector List Price: $23.00 Sale Price: $15.50 |
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Adjustable Non-Contact Voltage Detector Non-contact voltage detector gets the job done quickly and safely. View larger.If you are an electrician or a residential handyman, this Greenlee GT-16 non-contact voltage detector is a must for your tool box... |
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Sinometer MS8211 Pen-Type Auto-Ranging Digital Multimeter with Non-contact AC Voltage Detector List Price: $49.95 Sale Price: $29.99 |
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The Sinometer MS8211 is a pen-type digital multimeter with non-contact AC voltage sensor, it can measure AC/DC Voltage, Resistance, Diode and Continuity test. Its unique non-contact AC voltage sensor is a great feature for electric inspection, the maximum detection distance can be as far as 6 inches depending on the adjustable sensitivity... |
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Fluke 1AC-A1-II Volt-Alert AC Non-Contact Voltage Tester List Price: $50.16 Sale Price: $18.00 |
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Simply touch the tip to a terminal strip, outlet or cord. When the tip glows red, and the unit beeps, you know there's voltage in the line. Electricians, maintenance, service, safety personnel can quickly test for energized circuits and defective grounds on the factory floor, in the shop... |
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Greenlee GT-12 Non-Contact Self Testing Voltage Detector List Price: $19.97 Sale Price: $11.50 |
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Use to detect voltage in outlets, lighting fixtures, circuit breakers, wires, and cables, or to find a break in a wire. Features bright LED's and audible alarm sound if voltage is present. Silent mode feature for use in quiet settings... |
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Klein NCVT-2 Dual Range Non-Contact Voltage Tester List Price: $25.32 Sale Price: $14.99 |
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Klein Tools' new NCVT-2 is a dual-range non-contact voltage tester that automatically indicates low voltage (12-48V AC) and standard voltage (48-1000V AC). It is a convenient, compact tool that helps users work more accurately and faster... |
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Milwaukee 2201-20 Voltage Detector with Work Light List Price: $31.50 Sale Price: Too low to display |
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Designed to easily mount to select Milwaukee tools, the Milwaukee 2201-20 Voltage Detector with Work Light offers the convenience of two tools in one. Part of Milwaukee's Test & Measure line of professional, cutting-edge tools, the voltage detector quickly and easily identifies the presence of voltage and its work light enhances visibility around the jobsite... |
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Extech DV30 Non-Contact Adjustable AC Voltage Detector List Price: $13.99 Sale Price: $13.99 |
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Dimensions: 6.1x1.1x1" (155x28x25mm); Weight: 1.5oz (42g) == Applications == Detects "live" wires, breaks in wires, microwave oven leakage and checks polarity of fuses and circuit breakers --- Detect live wire and breaks in wires --- Detects hot side of lines --- Trace HVAC and security system wires --- Check polarity of fuses and circuit breakers |
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Extech 40130 Non-contact AC Voltage Detector List Price: $10.99 Sale Price: $10.99 |
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Non-Contact Detection of AC Voltage from 100VAC to 600VAC ? For use on 50/60Hz circuits ? Flashing red LED light and push button ON/OFF Audible beeper indicator ? Locate breaks in power cables ? Dims: 6 x 0... |
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Milwaukee Voltage Detector with LED Light, Model# 2202-20 List Price: $27.00 Sale Price: Too low to display |
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The Milwaukee Voltage Detector with LED light can detect between 50-1000V AC and has an industry-leading safety rating of CAT IV 1000V. With a built-in bright LED work light, this detector is two tools in one... |
Introduction To Radar Detectors
A radar detector is an electronic device used by motorists to determine whether their speed is being observed or not by a police officer. The objective of a radar detector is to protect the motorist from getting a speeding ticket from the officer who is using a radar gun.
Radar detectors were introduced in the early 1970's. The term radar detector originated from technologies that were used earlier to detect speed.
Now the question arises, "What is radar?" Radar is a system used to measure the speed and location of any object. This system consists of two important parts – a transmitter and a receiver. The radio transmitter causes voltage fluctuation by oscillating an electric current at a predefined frequency. This oscillation of the electric field generates electromagnetic energy. This electromagnetic energy propagates in the air as electromagnetic waves. A transmitter consists of an amplifier and an antenna. While the former increases the power of electromagnetic energy, the latter transits it into the air.
The basic function of radar is to determine its distance from the destined object. For this function, the radar device emits concerted radio waves to observe any echo. If any object comes in the way of the radio waves, then it can be easily detected by radar with the help of electromagnetic energy. Radio waves constantly travel in the air at the speed of light. The distance of the object from the radar is determined by observing the time taken by the radio waves to return.
For measuring the actual speed of any object, radar can be used with a fact called Doppler shift. When any moving object passes in front of the radar, its echo will reflect the signals of the radar. The time taken by the radio signals to return after striking the object, and the frequency with which they travel, gives the actual speed of that object. If an object is coming towards the radar, then the signals will come back in a shorter period of time. It will increase the frequency and tells the actual time in which an object will cross the radar. This process depends on how fast the frequency will change. Traffic police use radar in the form of a radar gun, which is either hand-held or vehicle mounted, to detect speeding vehicles.
A basic radar detector detects police radar with just a simple radio receiver. In contrast, detectors that are more sophisticated comprise of a basic receiver along with a radio transmitter. A jamming signal is produced via this transmitter. It blends the signal of the police radar gun with extra radio noise. Due to this, a perplexed echo signal is received by the police radar gun, and the exact speed-reading cannot be taken.
Light-sensitive panels are being used in modern detectors which detect the beams from police laser guns. Lidar is difficult to avoid due to its concentrated beam, so it is quite possible that by the time the detector is able to detect it, the vehicle is in the beam's sight already. For that, speeders also use a laser jammer. It works much like a radar jammer.
In conclusion, there are several systems available to detect radar, but none of these systems is a sure shot way to get protected against speed detectors. However, one thing that can be done to avoid speeding tickets is to 'slow down'.
About the Author
Article by Stefan Rockhaus. Visit Radar Detectors Guide for more Radar Detector information. Find further resources at Innovative Info
