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DROK DC Voltage Voltmeter

SKU Img. DC Measure Rang Color Display Wires Shell, Board Dimension Cutting Size US Amazon GB Amazon DE Amazon
100230  dc voltmeter DC 3.50-30.0V Red 3 Digit 0.28″ LED Display 2 Wires, Waterproof Shell / Waterproof 27x15x18 mm US UK DE
100231  dc voltmeter DC 3.50-30.0V Yellow 3 Digit 0.28″ LED Display 2 Wires, Waterproof Shell / Waterproof 27x15x19 mm US UK DE
100232  dc voltmeter DC 3.50-30.0V Blue 3 Digit 0.28″ LED Display 2 Wires, Waterproof Shell / Waterproof 27x15x20 mm US UK DE
100233  dc voltmeter DC 3.50-30.0V Green 3 Digit 0.28″ LED Display 2 Wires, Waterproof Shell / Waterproof 27x15x21 mm US UK DE
100017 dc voltmeter DC 2.5-30V Red 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
100018 dc voltmeter DC 2.5-30V Blue 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
100019 dc voltmeter DC 2.5-30V Green 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
090690 dc voltmeter DC 15-120V Red 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
090691 dc voltmeter DC 15-120V Blue 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
090692 dc voltmeter DC 15-120V Green 3 Digit 0.40″ LED Display 2 Wires Shell, Waterproof 40x25x23mm 37x20mm US UK DE
090742 dc voltmeter DC 2.5-30V Red 3 Digit 0.56″ LED Display 2 Wires Shell, Waterproof 49x30x27mm 46x27mm US UK DE
090743 dc voltmeter DC 2.5-30V Blue 3 Digit 0.56″ LED Display 2 Wires Shell, Waterproof 49x30x27mm 46x27mm US UK DE
090744 dc voltmeter DC 2.5-30V Green 3 Digit 0.56″ LED Display 2 Wires Shell, Waterproof 49x30x27mm 46x27mm US UK DE
100358 dc voltmeter DC 0-100V Blue 3 Digit LCD Display 3 Wires Shell 48x28x18mm 46x26mm US UK DE
100359 dc voltmeter DC 0-100V Green 3 Digit LCD Display 3 Wires Shell 48x28x18mm 46x26mm US UK DE
100360 dc voltmeter DC 0-100V White 3 Digit LCD Display 3 Wires Shell 48x28x18mm 46x26mm US UK DE
100362 dc voltmeter DC 3.5-30V Green 3 Digit LCD Display 2 Wires Shell 48x28x18mm 46x27mm US UK DE
100363 dc voltmeter DC 3.5-30V White 3 Digit LCD Display 2 Wires Shell 48x28x18mm 46x27mm US UK DE
090555 dc voltmeter DC 2.5-30V Red 3 Digit 0.28″ LED Display 2 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090556 dc voltmeter DC 2.5-30V Blue 3 Digit 0.28″ LED Display 2 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090557 dc voltmeter DC 2.5-30V Yellow 3 Digit 0.28″ LED Display 2 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090558 dc voltmeter DC 2.5-30V Green 3 Digit 0.28″ LED Display 2 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090551 dc voltmeter DC 0-100V Red 3 Digit 0.28″ LED Display 3 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090552 dc voltmeter DC 0-100V Blue 3 Digit 0.28″ LED Display 3 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090553 dc voltmeter DC 0-100V Yellow 3 Digit 0.28″ LED Display 3 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090554 dc voltmeter DC 0-100V Green 3 Digit 0.28″ LED Display 3 Wires Board 33x11x9mm 23.5×10.5mm US UK DE
090559 dc voltmeter DC 2.5-30V Red 3 Digit 0.36″ LED Display 2 Wires Board 33x15x10mm 24x15mm US UK DE
090560 dc voltmeter DC 2.5-30V Blue 3 Digit 0.36″ LED Display 2 Wires Board 33x15x10mm 24x15mm US UK DE
090561 dc voltmeter DC 2.5-30V Yellow 3 Digit 0.36″ LED Display 2 Wires Board 33x15x10mm 24x15mm US UK DE
090562 dc voltmeter DC 2.5-30V Green 3 Digit 0.36″ LED Display 2 Wires Board 33x15x10mm 24x15mm US UK DE
090563 dc voltmeter DC 2.5-30V White 3 Digit 0.36″ LED Display 2 Wires Board 33x15x10mm 24x15mm US UK DE
090144 dc voltmeter DC 0-100V Red 3 Digit 0.36″ LED Display 3 Wires Board 33x15x10mm 24x15mm US UK DE
090145 dc voltmeter DC 0-100V Blue 3 Digit 0.36″ LED Display 3 Wires Board 33x15x10mm 24x15mm US UK DE
090146 dc voltmeter DC 0-100V Green 3 Digit 0.36″ LED Display 3 Wires Board 33x15x10mm 24x15mm US UK DE
090077 dc voltmeter DC 2.5-30V Red 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090078 dc voltmeter DC 2.5-30V Blue 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090079 dc voltmeter DC 2.5-30V Green 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090567 dc voltmeter DC 4.5-150V Red 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090568 dc voltmeter DC 4.5-150V Blue 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090569 dc voltmeter DC 4.5-150V Green 3 Digit 0.56″ LED Display 2 Wires Shell 48x29x22mm 46x27mm US UK DE
090675  DC Voltmeter DC 0-10V Red 3 Digit 0.56″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US
090676  DC Voltmeter DC 0-10V Blue 3 Digit 0.56″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US
090677  DC Voltmeter DC 0-10V Green 3 Digit 0.56″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US
090565 DC Voltmeter DC 0-33.000 Red 5 Digit 0.36″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US UK DE
090566 DC Voltmeter DC 0-33.000 Yellow 5 Digit 0.36″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US UK DE
100034 DC Voltmeter DC 0-33.000 Blue 5 Digit 0.36″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US UK DE
100035 DC Voltmeter DC 0-33.000 Green 5 Digit 0.36″ LED Display 3 Wires Shell 48x29x22mm 46x27mm US UK DE
By | 2018-02-28T06:31:24+00:00 July 31st, 2015|Categories: DC Voltmeter|Tags: , |71 Comments

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71 Comments

  1. Quen August 20, 2015 at 10:52 pm - Reply

    I need instructions and wiring diagram from DORK&reg 0.56″ Fahrenheit scale car digital temp clock volt meter 3 in 1

    • Drok August 21, 2015 at 2:20 am - Reply

      Hi, sorry that we don’t have paper instruction for those DIY products. Here is the instructions and wiring diagram. Then if you have any other questions, please feel free to contact us.
      Thanks.

  2. RoyB September 8, 2015 at 1:15 am - Reply

    Is there any way to adjust a Drok 12V DC meter. It is installed in my RV with other DC meters and the DROK reads .2 to .4 Volts higher. All other meters are exactly the same.

    Thanks

    • Drok September 9, 2015 at 9:02 am - Reply

      dear friend,
      thank you for your message.
      could you please send the link of this product?? an please give us your order number.
      waiting for your reply.
      have a nice day.
      best regards

  3. Jim Newman January 20, 2016 at 3:11 am - Reply

    Just purchased the DC15-120V for my 48 v golf cart. Where can I find wiring instructions for this device. Thank you.

    • Drok January 20, 2016 at 9:39 am - Reply

      Hi,
      Thank you for your information.
      There are 2 wires, one is red and the other is black.
      Just connect the positive and black one connect the negative.
      This item has reverse connection protection.
      Hope this will help you.
      Any more questions please feel free to contact us.
      Best regards

  4. Digital AC/DC Multimeter 4 Data Display Voltage Current Power Energy – DROK February 16, 2016 at 6:20 am - Reply

    […] DROK DC Voltmeter […]

  5. Brad marcum February 18, 2016 at 7:05 pm - Reply

    What gauge wires come from the mini DC voltmeter?

    • Drok February 19, 2016 at 1:17 am - Reply

      Hello Brad marcum,
      Could you please send us the link or the ASIN of the product you are referring to??
      Waiting for your reply.
      Have a nice day!
      Best regards

  6. Devon Ruggieri March 18, 2016 at 10:19 pm - Reply

    Hello I bought the 0.36″ 5 digit 0-33.000V digital panel meter, and I need to remove the decimal point entirely, how do I do so electronically? Is there a way to reprogram the MCU in order to eliminate the addition of the decimal place? Or is there another way to modify the circuit in order to achieve this goal?

    • Drok March 22, 2016 at 2:09 am - Reply

      Dear friend,
      Is this the product you purchased? DROK®0.36″5 Digits DC 0-33.000V 12V LED Digital Display Voltmeter 3 Wires Voltage Tester Monitor High Accuracy Volt Testing Panel Gauge with Blue Digital Display for Car Automotive Vehicle
      If yes, here is a schematic of the backside of the meter:
      Schematic
      If you want you remove the decimal point, you can cut off the pin which is marked with green frame in the schematic.
      Hope this can help you.
      Best regards

      • Devon Ruggieri March 25, 2016 at 12:37 am - Reply

        This is a big help thank you.
        I have one more question for you. would it be possible to easily change the resolution from 00.001V to 0.0001V?
        My application requires a 10,000 to 1 division (Vin=10000, Vdisplay=1.0000) so it would be awesome if i can adjust it to display 10000 when 1v is being measured.
        Im pretty impressed with how affordable this meter is and how accurate it has proven to be.

        Id like to note that as an Electrical Engineer, Im a bit disappointed in the lack of a datasheet, or documentation of any sort. but all in all, Im pretty happy with my purchase

        • Drok March 25, 2016 at 2:03 am - Reply

          Hello Devon Ruggieri,
          You’re welcome.
          It is not possible to change the resolution from 00.001V to 0.0001V.
          Here is the instruction of the product.
          Insturction_100034
          Hope this can help you.
          Best regards

  7. Devon Ruggieri April 9, 2016 at 7:33 am - Reply

    I see that you now offer the 100 uv resolution Voltmeter. Unless its a knockoff, regardless its the same layout and same MCU so my question is what are the RSVG and Key terminals
    I can easily reverse engineer this product, but I figured it would be easier to just ask about it and possibly make my life a little easier lol. I have a lot of instrumentation needs that require panel meter interface for the sake of quick and accurate data aquisition in small packages. If I can calibrate this meter digitally, than I can implement a simple double slope integration for autozeroing with minimal effort, and ultimately increase accuracy and reliability while integrating multiple meters into one fixture. Please Reply Via Email, as Im not interested in any proprietary confliction, and would like to only better understand the meter I wish to implement into a system design that will likely need 6-10 meters.

    • Drok April 10, 2016 at 2:02 am - Reply

      Hello Devon Ruggieri,
      Thank you for writing in.
      Could you please tell us the ASIN or the link of the product you are referring to?
      With you help, we can find a solution more quickly.
      Best regards

  8. Allan Kaspar May 5, 2016 at 4:21 pm - Reply

    Recently purchased Drok .036″ DC digital display Car Battery Voltmeter from Amazon order # 108-7579116-0882601. Have installed but it only lights up 2 lights saying 0.0. The voltage going to this measures as 13.2. Any way you can help us?

    • Drok May 7, 2016 at 2:29 am - Reply

      Hello Allan Kaspar,
      Thank you for writing in.
      Could you please send us an email(service at droking dot com) to tell us how you operate the product, such as the wiring, the working environment?
      If you can, we sincerely hope that you can send us some images or video to let us check the problem details.
      Waiting for your reply.
      Best regards

  9. david June 9, 2016 at 5:54 pm - Reply

    I bought 2 of the 2.5-30 volt 2 wire voltmeter to use on my 200 watt solar panels they last 1 day then burn out. do I need to get higher voltmeter they charge 3 12 volt battery in a series.

    • Drok June 12, 2016 at 1:46 am - Reply

      Hi david,
      Thank you for writing in.
      Could you please tell us your order ID or the link of the product?
      It is better you can send us some images or video to let us check the problem details.
      With your help, we can find a solution more quickly.
      Waiting for your reply.
      Best regards

  10. Andrea July 22, 2016 at 10:17 pm - Reply

    Hi, I have a bank of 3 deep cycle 12V batteries. Can you recommend a volt meter or capacity meter that has a built in on/off switch so there is no ongoing drainage from the batteries while the meter remains connected?
    Thank you,

    • Drok July 25, 2016 at 1:57 am - Reply

      Hello Andrea,
      Thank you for your interest in our products.
      So sorry that we do not have a meter with built-in on/off switch.
      Beg your understanding.
      Best regards

  11. Robert July 27, 2016 at 2:50 pm - Reply

    Hello, I purchased your 5 digit 0-33v voltmeter. (https://www.amazon.com/DROK-0-33-000V-Voltmeter-Accuracy-Automotive/dp/B00CJR9QB6/ref=sr_1_2?ie=UTF8&qid=1469630554&sr=8-2&keywords=drok+voltmeter+5+digit) what is the input impedance? I need to step down from 200 to 20v and would like to have everything ordered.

    • Drok July 28, 2016 at 1:32 am - Reply

      Hello Robert,
      Thank you for your purchasing.
      The input impedance of this meter is 350K.
      This meter can only be used to measure the voltage cannot be used to step down the voltage.
      Hope this can help you.
      Best regards

  12. Stephen Short September 20, 2016 at 12:17 am - Reply

    Hi,
    Do you supply or know where I could source a replacement sticker/facia for the 0.28″ voltmeter? I use them without a frame as the item the go on needs to be flush but I find the paint/sticker peels easily.

    • Drok September 21, 2016 at 3:36 am - Reply

      Hello Stephen Short,
      Thank you for writing in.
      Here is a recommendation for you:
      DROK® Mini 0.28″ Digital Voltage Tester Voltmeter DC 0~100V Volt Meter 3.0-30V Power Battery Monitoring Gauge Blue LED Panel Display

      Parameters:
      Measuring range:DC 0~100V
      Operating voltage:DC 3.0~30V
      Min input: DC 0V
      Max input: DC 100V
      Measurement accuracy:1 %(+/- 1 digit)
      Refresh Rate：about 200mS/times
      Operating Temperature:-10 °c ~ +65 °c
      Power consumption: 5-15mA in normal condition
      Display:Three 0.28 ” LED digital tube
      Display Color:Green/Red/Blue/Yellow
      Cutting size:23.5mm x 10mm
      Mounting holes distance:28mm

      Wiring:
      Red: Power Supply +,(3.0~ 30V DC)
      White: Measure Voltage +,0~ 100V DC)
      Black: Power Supply -, Measure Voltage –

      Note:
      1.The meter requires extra power supply of DC 3.0 to 30V
      2.Its resolution is 0.1V and its actual error might larger than 0.1V

      Hope this can help you.
      Best regards

  13. new – DROK September 27, 2016 at 10:53 am - Reply

    […] DROK DC Voltmeter […]

  14. Tom November 12, 2016 at 7:53 pm - Reply

    I bought DROK Waterproof Digital Voltmenter DC 4.5-150V Voltage Tester 12V 24V 48V 72V Volt Battery Meter on Amazon about 2 weeks ago just installed it 2 days ago on my E-Z-Go RXV 48v. I was out today riding around and it burned right up. I had it connected with my charge meter 48v side of batteries. it was displaying correctly 46 to 50 volts depending on acceleration aND braking.. Any ideas?

    • Drok November 14, 2016 at 2:52 am - Reply

      Hello Tom,
      Thank you for writing in and so sorry for the inconvenience caused on you.
      Could you please tell us more details of your application, such as the input voltage/current, the wiring, the working environment?
      If you can, we sincerely hope that you can send us some images to let us check the problem details.
      You can send this information to us by email(service at droking dot com).
      With your help, we can find a solution more quickly.
      Looking forward to hearing from you.
      Best regards

      • Tom November 16, 2016 at 7:14 pm - Reply

        email sent with 3 pictures

        • Drok November 17, 2016 at 1:48 am - Reply

          Hello Tom,
          Thank you for your cooperation in this matter.
          We have written back to you.
          Have you received the email?
          Best regards

          • Tom November 17, 2016 at 5:32 am

            no yet, at the bottom of the first email was my reply email address (gmail)

          • Tom November 18, 2016 at 8:30 am

            Still haven’t received the email can you resend it to the Gmail account listed at bottom of my email with the pictures. thanks

  15. Steve December 8, 2016 at 5:26 pm - Reply

    Hello,
    I am looking to measure both positive and negative voltages, not more then +/- 20VDC. Do you have anything that meets this requirement?
    Thanks

    • Drok December 12, 2016 at 2:34 am - Reply

      Hello Steve,
      Thank you for your interest in our product.
      We have checked our product that we cannot find out a product suitable for your need.
      So sorry for not giving you helpful recommendation.
      Hope you can understand.
      Best regards

  16. Dave Hacker December 11, 2016 at 8:35 am - Reply

    DROK
    For the following display
    DROK 0.36″ LED 5 Digit DC0-33.000V 12V 24V High Accuracy Voltmeter Auto Digital Voltmeter Car Battery Tester Volt Gauge Panel Meter with Red Digital Display and 3 Wires

    Do you have or can recommend project boxes, enclosures for your meters with pre cutouts for your meters?
    Are any available with cases?

    Best Regards

    • Drok December 12, 2016 at 2:43 am - Reply

      Hello Dave Hacker,
      Thank you for writing in.
      So sorry that we do not have a project boxes, enclosures for this meter.
      Here is the dimension of this meter, please check it.
      Dimension_090565
      Hope this can help you.
      Best regards

  17. Francesco December 29, 2016 at 11:44 am - Reply

    Hello,
    I bought the DROK® Voltmeter DC 0-500V Blue LCD Digital Tester http://amzn.eu/7z5oexb
    Is it possible to change the range from 0-500V to 0-200mv or 0-20V?

    Thank you

    Regards
    Francesco

    • Drok December 30, 2016 at 1:59 am - Reply

      Hello Francesco,
      Thank you for writing in.
      The measuring range of this meter cannot be changed.
      Hope you can understand.
      Best regards

  18. ken schweiker March 15, 2017 at 2:10 pm - Reply

    I have received this but not installed yet. DROK Waterproof Digital Voltmenter DC 4.5-150V Voltage Tester 12V 24V 48V 72V Volt Battery Meter.

    The label on the device is checked red for 12V not 48V like I need it for. Will this cause it to burn up? I also what to install it on a golf cart.

    Also what is the button connected to the blue and yellow wire for? I also did not receive any instructions.

    Thanks.

    • Drok March 16, 2017 at 9:47 am - Reply

      Hello ken schweiker,
      Thank you for your writing in.
      We sincerely appreciate your order.
      There are too many similar titles for item, we are sorry we can’t enusre which item you mention.
      Would you please send us the link of item?
      Best regards.

      • ken schweiker March 17, 2017 at 1:57 pm - Reply

        https://www.amazon.com/gp/product/B01M8NQZ2Z/ref=od_aui_detailpages00?ie=UTF8&psc=1

        • Drok March 19, 2017 at 6:55 am - Reply

          Hello ken schweiker，
          Thank you for your reply.
          12v setting is factory default. If you want to change other value, please reset it.
          We are sorry for any inconvenience caused you.
          Here is a instruction for your reference.200073
          For more questions, please feel free to contact us.
          Best regards.

          • ken schweiker March 20, 2017 at 3:30 pm

            Hi,
            I dont have 12 volt batteries.

            I have six, 8V batteries. Total 48V. Should I return this item? – 2b says to set battery type. My type is not listed.

          • Drok March 21, 2017 at 9:10 am

            Hello ken schweiker,
            Thank you for your reply.
            You can choose “2V Lead-acid battery” on “2-b”,
            Then setting 24 sections on “3-C”.
            Hope this can help you.
            Best regard.

  19. ken schweiker March 16, 2017 at 7:05 pm - Reply

    https://www.amazon.com/gp/product/B01M8NQZ2Z/ref=od_aui_detailpages00?ie=UTF8&psc=1
    DROK 2in1 Battery Monitor Digital Voltmeter Tester for Electromobile, Waterproof LED Capacity Tester for 12V/24V/36V/48V Lead-acid Cell Lithium Battery, DC6-120V Volts Meter Panel

    • ken schweiker March 16, 2017 at 7:32 pm - Reply

      Also, I have six, 8V batteries. 48v system

      • Drok March 17, 2017 at 8:18 am - Reply

        Hello ken schweiker，
        Thank you for your reply.
        12v setting is factory default. If you want to change other value, please reset it.
        We are sorry for any inconvenience caused you.
        Here is a instruction for your reference.200073
        For more question, please feel free to contact us.
        Best regards.

  20. john May 31, 2017 at 5:56 pm - Reply

    I recently purchased on Amazon DROK Blue Black-light LCD Battery Capacity Monitor for my golf cart. I installed and set it according to directions. It worked fine for the first day then it quit. I took it apart and found the back to be chard. It appeared that it might of overheated. So I thought maybe it was just a bad meter. I sent for another one and reinstalled the second one. It worked fine for one day and did the same this it quit. The display still lit but it would not register a volt reading. I was wondering what I was doing wrong. Let me know what you think.

    • Drok June 1, 2017 at 8:26 am - Reply

      Hello Join,
      Thanks for writing in.
      Is it the following item?
      200192
      Would you mind my asking how you operate it?
      Please tell us more details, for example, battery type, measuring voltage, setting and etc.
      It’s better you can take a picture to show us how it is. You can send it to our service email:service#droking dot com ( please replace # with @)
      Best regards.

  21. Jane Burns June 10, 2017 at 8:58 pm - Reply

    Bought model YB28VE need to use with golf cart with that has six 6 volt batteries. Therefore a 36volt system. How should I set it up. I don’t see any buttons to push? Initially at what votlage should I hook it up to to set the settings. I don’t want to burn it out if initially it’s set on 12 volts.

    • Drok June 12, 2017 at 8:04 am - Reply

      Hello Jane Burns，
      Thank you for writing in.
      Do you mean this product?
      200214
      For 36V battery, please select 2V on “2-b” setting, select 18 on “3-c”
      The button is wired by blue and yellow wire.
      For more question,please feel free to contact us.
      Best regards.

  22. Eric Sevin June 11, 2017 at 2:16 pm - Reply

    Hi there. I would like instructions for the following part:

    DROK Waterproof LED Digital Battery Volt Meter DC 12V 24V 36V 48V 60V 64V 72V Acid Lead/Lithium Polymer Battery Capacity Indicator Thermometer Voltage Temperature Guage Monitor for Electromobile

    https://www.amazon.com/DROK-Waterproof-Thermometer-Temperature-Electromobile/dp/B071KX158H/ref=cm_cr_arp_d_product_top?ie=UTF8

    I believe the Drok part number is: SKU:200214

    Also, is there a way to turn off the unit when you don’t want it to be used so it doesn’t drain the battery?

    Thanks!

    • Drok June 12, 2017 at 2:26 am - Reply

      Hello Eric Sevin,
      Thank you for writing in.
      Actually, we have uploaded the instruction on the product page.
      Would you please try to find the “Technical Specification” part?
      Just like this one:
      sample
      In addition, it can be only turned off when disconnecting with battery.
      For more questions, please feel free to contact us.
      Best regards

  23. Bob Beck August 19, 2017 at 5:07 pm - Reply

    Hello. I recently purchased your 33.000v, 3.5-30v green display voltmeter. I am using it to monitor the air/fuel ratio of my turbocharged Dodge auto. It reads directly from the oxygen sensor in the engines exhaust stream. Even though you rate the meter for 3.5-30vdc, it has no problem detecting the small voltage that the sensor generates: 0-2.0vdc. I am very pleased with your product. It is well made, compact, and has a bright and easy to read green display. I feel it is an excellent value. Keep up the good work.

    • Drok August 20, 2017 at 3:12 am - Reply

      Hello Bob Beck,
      Thank you for sharing and we are so glad that this product can meet your need.
      If there is any question, please feel free to contact us.
      Look forward to serving you again.
      Best regards

  24. Nigel Tillyard September 11, 2017 at 10:20 pm - Reply

    Hello – I have just purchased four DC Voltmeter Model WM-090559 via Amazon and when testing them on a standard 12v AGM battery each one has at least one of the LED segments not working. With this many I feel it could be me or maybe I’ve got a bad batch? Any help appreciated. Thanks.

    • Drok September 12, 2017 at 8:16 am - Reply

      Hello Nigel Tillyard,
      Could you please kindly take some pictures about this and send your order ID to our email service@droking.com? Please don’t worry, we will solve your problem.
      Sincerely,
      DROK Team

      • Nigel Tillyard September 12, 2017 at 10:19 pm - Reply

        Hello – I’ve done that tonight. Hopefully the attachment size isn’t a problem and it will be with you now.
        Thanks, Nigel

  25. Riccardo Biancone November 20, 2017 at 1:54 pm - Reply

    Hello, I am looking at 1 ~ 8S Battery Monitor (https://www.amazon.it/gp/product/B017IIZLAK/ref=ox_sc_act_title_6?smid=AONS7HEF348I5&psc=1) and I’d like to know if that module instead ligthing the led and buzzing can be used to drive a relay to disconnect load.
    I am also looking for similar module able to recognize an overcharge condition and acts in the same manner

    Thanks in advance for you kind answer

    • Drok November 21, 2017 at 9:42 am - Reply

      Hello Riccardo Biancone，
      This item can’t be used to drive a relay. It is just a Low Pressure Alarm.
      Best regards.

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  30. Carol May 17, 2018 at 7:49 am - Reply

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  31. Karry May 21, 2018 at 11:03 pm - Reply

    What’s up, I log on to your blogs like every week.
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  32. Brandon June 19, 2018 at 5:14 pm - Reply

    Hello I Recently placed an order and I need to order three more but I haven’t been replied back to on my email and I can’t seem to find them on your web site

    Order ID: 1165

    • Drok June 20, 2018 at 8:52 am - Reply

      Hello Brandon,
      As it was the Dragon Boat Festival, we are sorry we can’t reply to you in that time.
      We have replied to your email.
      Best regards.

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  34. Rene October 9, 2020 at 2:32 am - Reply

    I have 4 Lithium batteries (12V 56A each). Wired 2 batteries in parallel (12V 112A) as one string. Then I wired both string in series (24V 112A). How do I setup the Drok Battery Capacity Monitor for a 24V Lithium system?

    Your manual clearly states: “This instrument is used for 48v Lead-acid battery by default. If you want to adjust it to use for other kinds of batteries, please contact us.”

    Need to know if this will work for my use. I want to hook up 2, one next to batteries in my truck bed and a second one inside my truck cabin (so I can monitor batteries while driving). Please send detailed setup instruction for my setup (24V Lithium).

    Thank you.

    • Drok October 11, 2020 at 6:43 am - Reply

      Hello Rene,
      Is it this item?
      For batteries in series, you should connect the open positive of first battery and negative terminal of last battery to your application, that is how the meter should be connected to.
      Please refer to below program method.

      Best regards,
      DROK

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