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Description: Digital calipers are an absolute essential. Here at SparkFun we use them all the time. These premium calipers come with an extra battery and auto shut-off. Measurements can be taken in either metric or standard. The calipers are 6" in length and make a great addition to any tool set.

These come with two 1.5V LR44 button cell batteries.

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Comments 25 comments

  • already got an identical pair of these, work great :)

    also found some old articles online about interfacing with it

    link1 link2 link3

  • What do you mean “metric or standard?” Where I come from metric is standard.

  • here is an instructable to try: http://www.instructables.com/id/Reading-Digital-Callipers-with-an-Arduino-USB/

  • Since you guys opened it up, it might be a good idea to show how does the serial interface work on them. The serial port is located on top of the plastic case in the 4th picture. I know that these could communicate with a serial interface reporting back the position. This might be handy for projects which require precision measurements with cheap options.

    • It’s not really serial. We’ve played around with it a bit and I might write some tutorial down the road.

    • ive already linked 3 articles (look up) which explain how to interface with it

  • Just wanted to point out that the datasheet says 0.0005" resolution but they are only 0.001" resolution, other than that you cant beat it for the price.

  • I received these calipers today, and they seem like they’re catching ever so slightly…almost like there’s rust or corrosion on the caliper bar…can I use WD40 or something to clean / lubricate them without damaging them?

    • If you are just simply adding WD40 so the calipers slide smoother, it should be alright.

  • I just got a set of these… Either they have a defect or I’m using them improperly. Whenever I try to open them up at a rate of more than, say, 1mm/sec, the reading suddenly jumps a couple of mm/inches (tried it on both, same problem). I also swapped out the battery in the calipers for the extra one provided; no change. Am I supposed to clean them or something? Can they not be opened quickly? Or do I just have a defective pair?

    Thanks

    • My calipers go with the flow and do not become inaccurate after quickly opening them. If anyone has issues like this, E-mail tech support(techsupport@sparkfun.com).

  • I have the (expensive) Mitutoyo version of these. They’re several years old now, and still on the original battery. Not sure if I’ll make up the price difference in replacement batteries, though.

  • It was very interesting seeing the digital calipers taken apart. Thanks for sharing this.

  • Warning! These are NOT CE like they are marked!

    Like anyone cares on their $15 calipers. I was following the Raspberry Pi debacle and was pleased to find a “fake” CE marked product in my drawer, or chinese export as these fake CE symbols stand for. Raspberry Pi found out the hard way about the chinese export symbol when they thought their product was failing but actually it was the CE marked router it was connected to that was failing the test http://www.raspberrypi.org/archives/996

    Just a funny story that I like to tell and show people at work as we put things through CE testing. It sure would be a lot easier to just export it to china, import it back and call it CE and be done :-D

    Great calipers though, I don’t care that its chinese export, it does the job and does it cheap.

  • Does anyone have any idea when these are coming back in stock? I need them before the 28th

  • Can somebody tell me what the final purpose of Sparkfun & Co, when I see things like that known to be sold 7E on ebay eg., Int. ship. included (except the wonderful plastic case, well..). Despite it is a good product, my real question is what makes sense to claim being “open” or “free as in speech”, I mean, thousands people spent time on things like linux or else with the idea of doing better or moving apart from the main branch. So what’s the matter to end up with such benefit ??? ( sorry Doc :D I need to speak..!)

    Sparkfun +10M revenue, or Adafruit +1M and that said “She expects Adafruit to bring in $5 million in revenue in 2011. Her goals? Double revenue again and keep the staff "small but efficient”“. There’re some young & older boys there who come to you with the idea they can trust on you. So guys, please keep business, but keep thinking :)

    PS : maybe there are few bits of accountince practices to show a kind of “new age post-funk-hyppie” streamline ?? I don’t know ! Wo bu zhïdào

    Edit : be sure it’s not about protesting, but just blinking our LEDs across frontiers. Just to know what to bring up with cash so. Cheers, The “frenchy nuts breaker”

    • Does anyone have any idea what he said? Oo

      • Has anyone really been far even as decided to use even go want to do look more like?

      • He’s trying to say what’s the point of having Sparkfun when you can buy these exact same caliper for cheaper on ebay (I bought mine for $10 USD, looks like he got his for $7, but that was 2 years ago). He’s also saying that Sparkfun and Adafruit are already making a lot of money, yet they still want to double in revenue (where do they get that revenue? Well from increasing price of course!). His line about “boys who come to you with the idea they can trust on you” means a lot of the hobbyist come thinking these guys are trustworthy (e.g. offering the best product for the best price) yet what they really do is just resell you Chinese products for a higher price. Not saying Chinese products are not good (I’m Chinese btw), but because they were made cheap, and Sparkfun bought them cheap, they should at least sell it to us for a more reasonable price (If I can buy mine for $10, and they’re selling for $15 that’s 50% increase in price, and they probably buy for less than $10 per caliper since they buy in bulks).

        I have no idea what he said about linux and the last couple of lines.

        I’m only translating because in part I agree with him (and because I’m Chinese so understand the poster’s Chinglish ;D). But then again that’s what all resellers do, and I think Sparkfun and Adafruit are here for children and hobbyist who doesn’t have all that time to try to find all these products on ebay and dealing with 4 week+ wait for shipping. Also you’ll never get scammed by Sparkfun or Adafruit (e.g. products not being delivered) whereas on ebay you can, and then have to deal with a bunch of crap to try to get your money back. Occasionally, Sparkfun does sell stuff for cheaper than you can find on ebay (e.g. Actobotic Skate Wheels) or at least if they’re the same price as competitors (e.g. Actobotic products), at least Sparkfun gives you free shipping whereas others (e.g. Robotshop, ServoCity) does not.

  • Just got mine, I can’t really test them for accuracy (don’t have a precision block yet), but they seem pretty consistent. Also slightly more substantial than I expected, particularly given the price.

    So far so good, I’ll report back in the distant future when I have more experience with it and something to compare it to. I have a micrometer somewhere… I just saw it last year…

  • These look like great tools, especially for the price. My only question is, how accurate are they? Are they actually accurate to that second decimal place, even in millimeters?

    • I have ordered one of these and have Mitutoyo gauge blocks to check how accurate they are. I’ll reply with the results when I receive my caliper from Sparkfun

      • I checked the accuracy of calipers using Mitutoyo gauge blocks with widths ranging from 0.0625 to 2.000 inches and found that they are accurate within +/- 0.001".

    • I don’t know about these ones, but the Mitutoyo calipers I use at work are about 15 times more expensive, and their rated accuracy is +/- 0.01in.


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