Strobe tachometer (RPM meter)
| Category | Price | Seller | Device |
|---|---|---|---|
| Utilities | Free | Dmitriy Kharutskiy | iPhone, iPad, iPod |
When the flicker frequency of light coincides with the speed of any object, such as a fan, the rotating fan may appear to be stationary. Changing the frequency of the flicker of light may help detect the rotation speed.
You may easily use the flicker frequency control buttons to quickly assign the flicker frequency with an accuracy of 0.0001 Hz (0.01 RPM):
• Up to 1000 Hz (60 000 RPM) for a connected flashlight (see the video on YouTube: https://youtu.be/iq6Xiums05o).
• Up to 100 Hz (6000 RPM) for the iPhone flashlight (iOS < 9).
• Up to 40 Hz (2500 RPM) for the iPhone flashlight (iOS 9+).
IF THE SPEED IS MORE THAN UPPER LIMIT, YOU MAY STILL DETERMINE THE SPEED BY FIRST MAKING MEASUREMENTS WITH A LOWER FLICKER FREQUENCY AND THEN MAKING A SIMPLE CALCULATION (AS EXPLAINED IN THE APPENDIX).
To change the frequency, you should simply press and hold the button. The flicker frequency can be displayed either in Hz or RPM.
The image you see will be sharper in lower external light.
After a long period of usage, in case of overheating, the iPhone flashlight turns off automatically.
LASER TACHOMETER
• Measurement range from 0.3 Hz (18 RPM) to 1000 Hz (60 000 RPM).
• Step 0.01-0.0001 Hz (1-0.01 RPM).
• Update time 1 sec.
• 5 mW laser power required.
Reviews
Seems to work
Mr. Sleep Incorporated
I just used the flashlight on my iphone 6 and tried this on a machine that I had already installed a digital rpm gauge on. Set the machine at 850-852 rpms (gauge was bouncing between the two) and this app indicated 849 rpms. I then set the machine to 1360 rpms and this app indicated 1359 rpms. ?? Only downside I see is that it needs to be kinda dark and my phone’s flash had to be pretty close to spinning machinery so that I could see the line I put on it. Kinda a safety issue! Apparently you can make a remote flashlight, but I didn’t bother with that.
Good... But not for the purpose it's intended
replehsnatas666
It unfortunately does notwork well as a tachometer,however, i accidentally discovered that this thing can use the amber led at higher frequencies! So good enough for me
Great app
TTMO20
I have a 5 year old iPhone 6 and I have used this app many times. It’s easy to adjust the strobe speed and it’s accurate. This is a no nonsense app and it works.
Restore Fails
Philbert D
Purchased and used in 2016. Now says “Update failed” when it insists on restoring. Delete/reinstall doesn’t help. Positive reviews are likely for new installs. Don’t recommend unless you’re going to use one time immediately. May function then. Wasted $$
Just okay
brandonstc6
App works but is off by about 400 rpm. App showed 3330 rpm. Actually was 2900 rpm. Explains why my mower wasn’t cutting grass as well as it should.
Industrial strobes
Russ H L
I compared this application with our industrial strobes we use at work, very very close, we compare drum rpm with others controlled by VFD in a paper mill , in most every case this is exactly the same reading.
Amazing
Бармамия киргуду
I use the free version to measure the movement of the impact head on a massage gun. Which in hertz and rpm shows very accurately. It is very easy to work with this program. Put a contrasting mark on the mechanism that you need to measure (Rotating or reciprocating). Turn on the mechanism and turn on the light on your phone, and select the numbers by which the mark becomes stationary. Definitely five stars. Do not forget to turn off the light on your phone by pressing the button in the upper right corner.
