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Internet #206177753

Model #NCS-8904R

Store SKU #1001418358

Non-contact Tester with Screw driver

$1197
  • Includes a built-in light for working in dark areas
  • Includes a contact and non-contact detection method
  • 2 alkaline LR44 batteries are included with the tester
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Product Details

Commercial Electric
Product Type
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User Guide
Warranty
Illustrations may vary
The Commercial Electric Voltage Tester NCS-8904R is the contact/non-contact voltage tester, which could be used on 70 - 250 AC circuit, socket and wires. The tester features the continuity test. Flash light and self-testing design are creative on this tester.

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

16Questions
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Q:My flashlight doesn't work on this unit, so I purchased new LR44 battteries. It says to remove tip part A the tip tina our shock . I'm not sure how to safely install these button batteries safely.
by|Oct 15, 2022
1 Answer
Answer This Question

A:  Batr, There are two screws on the unit, be sure the unit is off before you open the device, remove the two screws and the cap, the two halves of the unit should come apart, then replace the LR44 Batteries. put the two pieces back together and put the screws back into the unit. Hope this helps, If you require further assistance, please call our technical support line. 877-527-0313

by|Dec 5, 2022
    1 found this answer helpful
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    Q:how to open to replace batteries?
    by|May 23, 2022
    1 Answer
    Answer This Question

    A:  Dear Customer, There are two screws that need to be removed at the back of the unit. once you remove those batteries, you can take the green clip off of the top of the unit. After that the two halves of the unit can be taken apart from one another and you will see the LR44 button cell batteries.

    by|May 23, 2022
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      Q:Will this detect power in a low voltage connection(doorbell)
      by|Sep 23, 2021
      5 Answers
      Answer This Question

      A:  The lowest voltage this unit will detect is 70 volts, if the voltage of your doorbell is less it will not detect it. Mike

      by|Dec 5, 2022
      1 found this answer helpful

      A:  Commercial Electric NCS-8904R non-contact Tester with Screw Driver can measure AC voltage from 70 to 250. Please see the manual page 4.

      by|Sep 24, 2021

        A:  Seems to.

        by|Feb 8, 2022

        A:  Most door bells operate at a voltage lower than 70 Volts, newer doorbells can take up to 24 volts. This product has a minimum voltage range of 70V so it will not detect anything lower than that.

        by|Dec 5, 2022
          1 found this answer helpful

          A:  Not necessarily. Look for YouTube video about how to use it and read the reviews. I returned mine unopened,

          by|Apr 2, 2022
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          Q:can this be used to test circut boards
          by|Nov 13, 2020
          5 Answers
          Answer This Question

          A:  I would recommend purchasing a digital multimeter for testing circuit boards. This product is used for determining if voltage is present in wires. With a digital multimeter you would be able to measure the values of current, voltage, and amperage going through a circuit board to help determine the issue that the board may be having. The non-contact tester will just tell you if there is the presence of voltage.

          by|Oct 6, 2021

            A:  To some degree, yes

            by|Apr 7, 2022

            A:  No

            by|Apr 6, 2022

            A:  Commercial Electric NCS-8904R can measure AC voltage from 70V to 250V. If your circuit board is running AC voltage at (70 - 250V) range, then you can use NCS-8904R to check if AC voltage is present or not.

            by|Nov 13, 2020

              A:  We have not used it to test a circuit board!

              by|Nov 13, 2020
              Showing 1-4 of 16
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              Customer Reviews

              3.4 out of 5
              (396)
              • 3.4
                out of 396 reviews
              • 54%recommend this product
              Filter by:
              Showing 1-10 of 396 reviews
              Easy to work good sensor and the little light comes handy worked as advertised
              Easy to work good sensor and the little light comes handy worked as advertised
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              While trying to satisfy the requirements of both a contact and non-contact voltage measuring dev...
              While trying to satisfy the requirements of both a contact and non-contact voltage measuring device, this item accomplishes both, but neither well. The instructions provided are somewhat convoluted and, in some cases, erroneous. This is a simple device that is generally used to quickly verify if circuits are live or not. A label on the tool instructs the user to test on a known live circuit first, yet the instructions give several optional methods of performing “self-tests”, one which is flawed by the variable of grip and skin moisture the other due to the wording of the instructions. The “switch off” self test, where on grabs the exposed tip with one hand and the side contact plate with the other only works if your skin is relatively moist and your grip firm. The other method, with the tool in the “on” (high or low sensitivity) position references “both green lights illuminated”….when there is only one green light. The choice of a green light (LED) as an indicator of voltage present is unfortunate, as the power industry generally considers green indicators to show an open or de-energized state. While the tool can be used in the “non-contact” mode, with the cap in place (covering the exposed conductive tip) the cap is not captive and could be easily misplaced. A white LED “flashlight” is incorporated (which requires the tool be in one of the two “on” modes (H/L). The contact tip is shaped much like a screwdriver, however, since the instructions make no mention of being used in this capacity, one must assume that to do so may damage the housing which secures the tip. As this tool lacks intuitiveness and repeatable response under varying conditions it is certainly not the best solution out there.
              by
              15 found this review helpful
              This product seems to work okay but the manual is really confusing so it is hard to tell if I’m u...
              This product seems to work okay but the manual is really confusing so it is hard to tell if I’m using it correctly. On the switch there is an O, L & H setting. What do the different settings mean? Maybe off, low and high. Some examples of my confusion from the manual. On page 5 it says: “The red indicator light (B) illuminates indicating the presence of AC voltage.” And then: “Whenever neutral or earth (ground) is disconnected, the red light indicator light (B) will also illuminate…” So if the red light illuminates is it just AC voltage or disconnected neutral or ground? On the bottom of the same page it talks about “Testing AC Voltage using the non-contact method…”, but then it says to “…gently trace the tip (A) of the tester onto the wire.” So if you are touching the wire how is it non-contact? On page 6 it says: “To reduce the sensitivity, place your other hand onto the object you are testing.” Aren’t you testing a wire with AC voltage? Why would you want to place your hand on the wire? On page 7 the instructions say to replace the small watch type batteries you should: “Use a screwdriver to unscrew and remove the battery cover…” What you are actually doing is removing the whole side and the clip comes off too. Also be careful because the two screws are different. I would prefer a AAA battery and an easier way to change it but I suppose they take up more room. It is really inexpensive so I suppose you can’t expect too much.
              by
              9 found this review helpful
              by
              • Verified Purchase
              tried to use with christmas lights. did not...
              tried to use with christmas lights. did not help to solve light problem. Meter would not alway be reliable to indicate if their was electric present. I will need to get a better tester.
              by
              • Verified Purchase
              by
              • Verified Purchase
              Not Great
              Hard to get batteries. Unit sensativity not stable. Returned & ordered Klein tools brand.
              by
              • Verified Purchase
              Great little tester for us amateur electricians who don't like...
              Great little tester for us amateur electricians who don't like getting shocked. Works as contact or non-contact tester. Fairly inexpensive and worked as advertised.
              by
              • Verified Purchase
              by
              • Verified Purchase
              It's junk! The only thing that actually works correctly is...
              It's junk! The only thing that actually works correctly is the screw driver.
              by
              Response from Mastech GroupDec 28, 2022
              Dear customer,
              If you would like further assistance with your Commercial Electric non contact tester please give our technical support line a call: 877-527-0313 MastechGroup
              • Verified Purchase
              Showing 1-10 of 396 reviews

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