Reviews Electronical Test Pen

APEX AAO1 Audio Oscillator

Body Size: 11 x 4.65 x 3.6mm / 0.43" x 0.18" x 0.14" (L*W*H).
DIP Quartz Crystal Oscillators for RISC & CISC Microcontrollers.
Widely used in TV, electronics, PC cards, electronical meter, DVD, MP3, MP4, etc.

■【Intuitive Design】Hqdz-td Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights..
■【Simple to Use】Hqdz-td Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector.
place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep..
■【Fast Results】Hqdz-td's Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds..
■【Portable】Hqdz-td Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack.Diamond Tester Pen and 60X LED Lighted Loupe combo is a must have tool kit wh....

Body Size: 2 x 6mm / 0.08" x 0.24" (D*L).
DIP Quartz Crystal Oscillators for RISC & CISC Microcontrollers.
Widely used in TV, electronics, PC cards, electronical meter, DVD, MP3, MP4, etc.

✔【Intuitive Design】Hqdz Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights..
✔【Simple to Use】Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector.
place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses..
✔【Fast Results】Hqdz’s Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds..
✔【Portable】Hqdz Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack. Hqdz’s Diamond Tester Pen and 60X LED Lighted Loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap....

Body Size: 11 x 4.65 x 3.6mm / 0.43" x 0.18" x 0.14" (L*W*H).
DIP Quartz Crystal Oscillators for RISC & CISC Microcontrollers.
Widely used in TV, electronics, PC cards, electronical meter, DVD, MP3, MP4, etc.

[ Convenience Use ] 5 Seconds know water quality, Accuracy, Faster. This set Combo of TDS PH EC Temperature. Also it have Best Price, Trustable Quality, all make it be your FIRST water quality Test..
[ How Accuracy? ] PH resolution is 0.01pH,accuracy ±0.05pH.TDS:0~9990ppm,Conducitivity:0~9990us/cm,Accuracy:±2%.This’s same as big brand resolution in Amazon, but Pancellent test only need half price of them..
[ Lasted Model ] PH pen have AUTO CALIBRATION function, not need any kind of screwdrivers to calibrate the pH pen tester.TDS pen have Lock & auto shut off function..
[ Pocket Portable ] Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics..
[ Money Back Guarantee ] Pancellent (Plan of excellent) to provide 30 days Money Back Guarantee and 120 days Replacement Service..

【Neon Tube Light Display】- The neon tube light of the circuit pen will light when the pen detects voltage.
【How to Use】- When you use the voltage test electroprobe,before testing,it is necessary to insert the screwdriver to the bottom,hold the finger....
【Two Usage】- Two kinds of applications,one for measuring circuit electrical penand the other for screwdriver.Two types of screwdriver tips on the....
【Warm Tips】- AC circuit tester light detector is for indoor use only and to avoid strong light..

【Ignition Test Pen】---This Spark Ignition Tester Pen can be used to test spark plugs, coils and distributors in two places, the electronic ignition system and the circuit breaker. The grooved end makes the contact area between the wire and the instrument larger, and the high-brightness bulb makes the measurement results easy to observe..
【Careful Design】---Grooved end makes the contact area between the wire and the instrument large, ensure accurate test.With portable pen clip, easy to carry and store, bring much convenience for you..
【Professional Quality】---Car Wires Coils Diagnostic Tool with quality light bulb, high brightness, easy to observe, convenient to use.Stable characteristics, professional performance, high reliability.Conform to strict quality control standards, dependable to use..
【Usage】---When the engine is started, place the grooved end of the engine ignition indicator on the spark plug wire. If the bulb flashes, the spark plug wire is transmitting the spark signal.Length:Approx.125mm/4.9in.
【After-sales service】: We are committed to providing the best products and best services. If you have any questions about our products, please contact us by email. Our professional customer service te....

[Why do you need pH and DTS & EC meters] – it is a tool to improve your quality of life. these testers can be used to test drinking water, swimming pools, fish tanks, RO systems, or hydroponic water. Any environment that requires testing of water can use these testers to get accurate data. You have to be safe because water can be life, but can be dangerous..
[Test your water with this TDS and EC meter] - Is your water pure and drinkable? With the push of a button, the TDS water quality tester will tell you your overall water purity level, which will be displayed on the screen in ppm. Our pen can quickly display the conductivity level of water (Conducts Electricity (EC)) also.
it means the dissolved minerals (ions) in water are what conduct the electricity. Finally, you will know the level of pollution and mineralization of water..
[Automatic temperature compensation] - There is no need to worry about the temperature of the test liquid affecting the measurement results, as both the pH meter and TDS meter have an automatic temperature compensation function that adjusts to the water temperature.
[pH tester] Full measurement range of pH 0 - 14, reliable and quick readings. How to calibrate pH pen - Press CAL key for 5 seconds to enter calibration mode, th....