Handheld Tachometer - Laser & Contact - Review & Demo

DT2234C+ and DT2236C Digital Laser and Contact RPM Tachometers, review and demonstration.
* * * Using the following links will support my channel. * * *
Eachine H74 Vertical Twin Cylinder Engine Pump Radiator & Fan ID: 1911175 ban.ggood.vip/... Code: BG4d6ecb
Eachine R90S Horizontal Twin-Cylinder Opposed Firing Motorcycle Engine ID: 1894176 ban.ggood.vip/...
Eachine EM1 Double Piston Engine ID: 1778555 ban.ggood.vip/... Code: BGacd43a
Eachine EM2 Vertical Engine Flying Ball Governor ID: 1833171 ban.ggood.vip/...
Eachine EM3 Horizontal Gasoline Engine ID: 1852322: bit.ly/3whfv9X Code: BGacd43a
Eachine EM4 Gasoline Engine ID: 1852323: bit.ly/2SLfpd5 Code: BGacd43a
Eachine ET7 ID: 1746155 ban.ggood.vip/... Code: BGacd43a
Eachine ET1 STEM Upgrade Hit & Miss Gas Engine ID: 1430588 bit.ly/2lLMIM0 Code: BG9d794c
Eachine ET6 Hit & Miss Engine w/ Flying Ball Governor ID: 1720034 ban.ggood.vip/... Code: BGacd43a
Eachine ETX Vertical Hit & Miss Gas Engine Water Cooling ID: 1549664 bit.ly/2maaX71 Code: BGacd43a
Eachine ET5 Engine ID: 1686955 ban.ggood.vip/... Code: BGacd43a
Eachine ET5 Pro Engine & Pump ID: 1833172 ban.ggood.vip/... Code: BGacd43a
Eachine ET5S Horizontal Two Cylinder ID: 1863521 bit.ly/2TcJxOM Code: BGacd43a
Eachine ET8 ID: 1789782 ban.ggood.vip/... Code :BGacd43a
Piston O-Ring for Eachine ET5 (10 pcs) ID: 1718554: ban.ggood.vip/... Code: BGacd43a
Rope Starter Kit ET1 ETX Hit & Miss Gas Engine ID: 1573482: ban.ggood.vip/...
Piston O-Ring for Eachine ET1, ET6, ET7, ET8 and ETX Hit & Miss Engine ID: 1481247 www.banggood.c...
Mini Spark Plug 1/4-32TPI ET5 EM1 ET1 ET6 ET7 ET8 ETX Engines ID: 1573483 www.banggood.c... Code: BGacd43a
Eachine 4-cycle Hit & Miss Gas Engine Ignition System Replacement. ID: 1573481 www.banggood.c... Code: BGacd43a
Tarot Large Scale Stirling Engine: ID: 1096425 bit.ly/2MyAnGt
Gatling 6 Cylinder Stirling Engine Model External Combustion Engine ID: 1484675 bit.ly/2MqaQxw
Replacement Glass Cylinders & O-rings for the repair of one cylinder - Gatling Stirling Engine ID: 1754567 ban.ggood.vip/... Code: BGacd43a
Star Power Vacuum Engine on wood base ID: 1028038 bit.ly/31p6spN Code: BGacd43a
Star Power Vacuum Engine on Black Base ID: 1240602 bit.ly/2OrTMZI
Sai Hu V1-45 Vacuum Engine ID: 1222586 bit.ly/2Yk8zNl
SaiHu SH-02 Vacuum Engine Model ID: 1155670 bit.ly/36HhN6z Code: BGacd43a
This Page Sells Everything: bit.ly/2kEpwzh
Microcosm T1B Hero Of Alexandria Steam Engine ID: 1333744 (code: BG58e101, 10%off) bit.ly/31mVMq9 Code: BGacd43a
Microcosm Brass Mini Live Steam Engine ID: 912044 www.banggood.c... Code: BGacd43a
Microcosm M88 Full Metal MINI BEAM Steam Engine Model ID: 1335299 bit.ly/2NO5xbJ Code: BGacd43a
Mini Vertical Stirling Engine ID: 1269696 bit.ly/2GES4QU
UFO Spin Steam Engine ID: 1767919 ban.ggood.vip/...
Hit and Miss Engine up to 50%off: bit.ly/2OLPlrO
HT-18 Handheld Infrared Thermal Camera 220x160 Resolution ID: 1255696 www.banggood.c... Code: BGf7c0b0
HT-19 Handheld Infrared Thermal Camera 320x240 Resolution ID: 1536394 www.banggood.c... Code: BG590318
DT2236C Digital Laser and Contact RPM Tachometer ID: 948528 ban.ggood.vip/... Code: BG95ef3f
DT2234C+ Digital Laser RPM Tachometer ID: 20463 ban.ggood.vip/... Code: BG420018

[@stevel227]

Ron ... If you want a new tachometer project, it is pretty easy to add a digital-readout tach on the front of your drill press. I built mine using a Hall proximity monitor triggered by a button magnet epoxied to the underside of the drill press pulley attached to the chuck. The proximity monitor sends a counting signal to a counter/clock mounted on the front of the drill press head. Easy peasy, and pretty cheap.

[@victork3397]

I’d love to see a video of this in action and how you put it together

[@millie19301]

Ron, another great video. I appreciate the things you test, Cheers!

[@Robonza]

Hey Ron, good to see a new video. If that tape is retro reflective you may find you get better results holding it farther away. Also with the lights off you may get cleaner results too.

[@RonaldWalters2010]

Good advise. Thanks! Ron

[@Chris_Grossman]

When you use the contact tachometer you are putting a small load on the engine and I would expect a slight reduction in speed. Just because you got a different reading does not make either one wrong.

[@thenri99]

What makes you say the contact tachometer is more accurate? I would expect that the contact induces a small load on the engine which slows its speed, so I would expect the laser tachometers to have a more accurate reading (~2000 rpm) because the act of measuring affects the phenomenon less.

[@XPFTP]

how far from wheel do you have to be for it to be right? i testing a 12hp motor and 6 inchs was way high. far away was closer to idle rpm.. like 2ft away. its with the 12 buck one in this video.

[@RonaldWalters2010]

As you see in the video, I am fairly close to the flywheel. Measuring off a larger diameter will give better results (a pulley rather than a motor shaft). A non-reflective surface with the reflective tape will be more accurate (a reflective or polished surface will reflect the laser as does the reflective tape, giving some false readings). 2 ft away is probably too far away. If you can rest the tachometer on a solid, non-vibrating surface it will give better readings than trying to hand hold it and it is being waved around a bit (the steadier the better). Think of it as looking through a rifle scope... only as accurate as it is being held steady. Also, the tachometer needs to be held square to the rotating surface (square in both directions). The more accurately (and steady) you hold the instrument the better the readings will be. Usually, the closer the better (as long as it is safe to do so) as fewer false reflections should be detected.
Truth be known... I still prefer the old fashion, analog, contact tachometers.
Thanks for watching. Please subscribe.
That's what keeps this channel going!
Ron

[@XPFTP]

@@RonaldWalters2010 went out to retry how i was doing it.. after you saying about the reflective surfaces. found it worked much better. also sun light doesnt help to much lol... but i wish i could use contact rpm. but old kohler 12 hp motors sort of tough to touch anywhere to get reading.. be nice if someone made a tach for 1 cyl motors. but ty for responding and info it helps for sure.. good vid..