where do you get replacement tape

Instead of paying a $1 per strip, I use HVAC foil tape I had laying around the house. Only $10 for a 150-feet roll ($8 at HD/Lowes). Something like this https://www.amazon.com/Homemory-Aluminum-Inches-Yards-Furnace/dp/B01M7S4APP/ref=sr_1_7?s=industrial&ie=UTF8&qid=1506079959&sr=1-7&keywords=hvac+foil+tape

Can a reading be taken on the end of a 5/8" dia shaft, or do you have to put the reflective tape on the side of the shaft and aim laser from the side?

You can make a "flag" out of reflective tape and wrap it around the shaft, then all you need to do is aim the tach at the flag (not the center of the shaft). If you're still having trouble, try holding a 3x5 note card with it's edge aligned (parallel) with the center line of the shaft so that only 1/2 of the shaft is visible to the device, then it will only be able to measure the flag one time per rotation and it won't accidentally pick up the flag's reflection twice as it goes around.

how is the battery life when not in use... I had one similar to this one and if i left the battery in it would kill them. anyone else have this prob?

I received mine in December 2018. I use it infrequently. Up till now (about six months) the battery is still good and working well.

I know this unit can read off the RPM, but does it also count a number of revolution?

It does not count the total number of revolutions. You would have to do the math (RPM x minutes). This is a basic unit that shows a minimum and maximum value (RPM) obtained during a reading. It also requires reflective tape to be applied on the shaft (or rotating object). It's not a unit that you can just point and shoot and come up with various readouts.

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NEIKO 20713A Digital Tachometer, Noncontact Laser Photo Sensor with 2.5 to 99,999 RPM Accuracy, RPM Gauge Marker with Batteries Included

Product ID: 2719719

Details

Brand
NEIKO
Item Weight
0.4 Pounds
Item dimensions L x W x H
6.25 x 4.25 x
Material
Crystal
Number of Items
1

🎯±0.05% ultra-precise accuracy

📏2" to 20" noncontact measurement distance

🚀2.5 to 99,999 RPM range

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Measure with laser focus, master your machine’s rhythm!

SPEED DEMON RANGE - Capture rotational speeds from a gentle 2.5 RPM up to a blazing 99,999 RPM—perfect for everything from small motors to high-speed machinery.
PINPOINT PRECISION - Experience laser-accurate RPM readings with a margin of error as low as ±0.05%, ensuring your diagnostics never miss a beat.
USER CENTRIC DESIGN - Large, easy-to-read LCD screen and ergonomic handheld form factor make on-the-go RPM monitoring intuitive and comfortable.
ALL INCLUSIVE READY TO GO KIT - Includes batteries, reflective tape, and a cushioned protective case—everything you need to start measuring right out of the box.
EFFORTLESS NONCONTACT MEASUREMENT - Measure RPM safely and cleanly from 2 to 20 inches away using advanced laser photo sensor technology—no physical contact needed.

The NEIKO 20713A Digital Tachometer is a professional-grade, noncontact laser RPM meter designed for precision diagnostics. With an ultra-accurate ±0.05% margin of error and a wide measurement range from 2.5 to 99,999 RPM, it delivers instant readings from up to 20 inches away. Its large LCD display, ergonomic design, and included accessories make it an essential tool for engineers, mechanics, and millennial professionals who demand reliable, on-the-go performance monitoring.

Specifications

ASIN	B000I5LDVC
Best Sellers Rank	#5,175 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Industrial Tachometers
Brand Name	NEIKO
Customer Reviews	4.3 4.3 out of 5 stars (2,646)
Global Trade Identification Number	00837013207139
Included Components	Digital Tachometer
Item Dimensions	6.25 x 4.25 x 1.75 inches
Item Weight	0.4 Pounds
Manufacturer	Ridgerock Tools Inc.
Material Type	Crystal
Model	20713A
Part Number	20713A
UPC	837013207139
Unit Count	1.0 Count

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