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  1. #1
    Join Date
    Mar 2002
    Posts
    17,265

    Default Very cheap handheld digital tachometer - any good?

    I am considering the purchase of one of these tools.
    Did anyone try (or heard about) that, or any other similar bit of kit?
    Considering the price, I'm not too scared by the idea that it could die upon the third usage - if not the first...
    But buying a POS is something that annoys me regardless of its price, hence this thread!

  2. #2
    Join Date
    Jun 2004
    Location
    Anglesey Wales
    Posts
    11,065

    Default Re: Very cheap handheld digital tachometer - any good?

    Worth a shout at that kinda dosh
    What do you want one for Mapis?
    Jerk of all Trades Master of None

  3. #3
    Join Date
    Mar 2004
    Posts
    5,958

    Default Re: Very cheap handheld digital tachometer - any good?

    just bought one of those, used it twice so far.
    does what it says on the can.

  4. #4
    Join Date
    Dec 2006
    Location
    on the boat
    Posts
    1,244

    Default Re: Very cheap handheld digital tachometer - any good?

    Had one for years, used it couple of times for setting tick-over revs and recalibrating the tacho on the boat. Works well does what I need

  5. #5
    Join Date
    Mar 2002
    Posts
    17,265

    Default Re: Very cheap handheld digital tachometer - any good?

    Quote Originally Posted by Kawasaki View Post
    What do you want one for Mapis?
    Just a crosscheck with analogue instruments, whose accuracy leaves something to be desired.
    I'm not concerned about the last 10rpm of course, but I'd like to sync the engines exactly at my usual cruising speed (using the digital thing), and then check what I read on the dashboard gauges, for future reference.

    Happy to stand corrected if I'm missing something!

  6. #6
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    6,897

    Default Re: Very cheap handheld digital tachometer - any good?

    Quote Originally Posted by MapisM View Post
    I am considering the purchase of one of these tools.
    Did anyone try (or heard about) that, or any other similar bit of kit?
    Considering the price, I'm not too scared by the idea that it could die upon the third usage - if not the first...
    But buying a POS is something that annoys me regardless of its price, hence this thread!
    Wanted one for a while to calibrate my analogue tachos. Just ordered - thanks for the link and will let you know.

  7. #7
    Join Date
    Jun 2004
    Location
    Anglesey Wales
    Posts
    11,065

    Default Re: Very cheap handheld digital tachometer - any good?

    Quote Originally Posted by MapisM View Post
    Just a crosscheck with analogue instruments, whose accuracy leaves something to be desired.
    I'm not concerned about the last 10rpm of course, but I'd like to sync the engines exactly at my usual cruising speed (using the digital thing), and then check what I read on the dashboard gauges, for future reference.

    Happy to stand corrected if I'm missing something!
    Ahh, I see
    Sounds good to me
    Order one then
    Try it
    If itís carp let us know
    Save us lot bothering
    Jerk of all Trades Master of None

  8. #8
    Join Date
    Sep 2016
    Location
    SoF
    Posts
    8,546

    Default Re: Very cheap handheld digital tachometer - any good?

    Quote Originally Posted by MapisM View Post
    I am considering the purchase of one of these tools.
    Did anyone try (or heard about) that, or any other similar bit of kit?
    Considering the price, I'm not too scared by the idea that it could die upon the third usage - if not the first...
    But buying a POS is something that annoys me regardless of its price, hence this thread!
    How do you use it? Put the reflective strip on the crankshaft pulley?

  9. #9
    Join Date
    Mar 2002
    Posts
    17,265

    Default Re: Very cheap handheld digital tachometer - any good?

    Precisely.
    Nothing that I invented, btw: any half decent mechanic has something like that in his toolbox (together with an IR-gun for temperatures, which I already have).
    I learned from some of these folks that they don't trust the onboard instrumentation even with electronic engines, though the differences (if any) are much smaller than with analogue gauges, obviously.
    Otoh, for using it just in a few odd occasions, I would never fork out 500 Eur or so for a Fluke 931, which afaik is the reference tool in this field.
    But at 10 quid or so, there's no need for sophisticated man math...! :-)

    Anyway, since I'm far from being in any hurry, I'll wait to hear from Elessar his impressions - thanks in advance for that!
    What Loddon reported is already reassuring, anyhow.

  10. #10
    Join Date
    Feb 2016
    Posts
    194

    Default Re: Very cheap handheld digital tachometer - any good?

    I have one for the reasons above. Looks the same but sourced from an electronics shop here. Works with reflective strips on the crank. Accuracy seemed good, but it was a bit fussy about alignment with the strip. Highlighted the port rev counter being out by 400rpm at 2200... Purposely done I think to mask a knackered turbo... (Found before checking rpm) I was trying to source the issue of the sticks being way out of line at cruise....

    Steve

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