What is the smallest motor it can reliably be used on?

Thank you for your question. When you are using our 6208A digital contact tachometer, please hold the speed tach meter and make sure it is aligned with the target, then you can easily read the data.

I'm getting rpm readings that vary widely in rpm mode with the cup tip, including readings above the 19999 rpm limit. any ideas how to troubleshoot?

Thank you for your question. When you are using our 6208A digital contact tachometer, please hold the speed tach meter and make sure it is aligned with the target, then you can easily read the data.

The unit came with two wheels, which wheel is for metric and which is for standard?

Make sure to select 6" perimeter from the options: Use the manual to set. You have the option of 6",12" or 0.1m. The unit came with a wheel 6 inch circumference wheel. That is the one used to measure ft/min, ft/sec in/min. To find out which one use a ruler, place a mark on the outside of the wheel. Then set the mark at 0" on the ruler and role it to 6". The mark should end up at 6" on the ruler. The 2 small wheels are used to measure RPM

Can it read the RPM of an auto engine by holding the contact tip against the engine?

Yes, it is the contact measurement tachometer which can read the RPM of the auto engine, and the range is 50-19999RPM.

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PT6208A Digital Contact Tachometer - 50-19999RPM Speed Meter

Product ID: 31001811

Details

Brand
Protmex
Item Weight
200 g
Item dimensions L x W x H
7.6 x 2.36 x
Material
Plastic
Number of Items
1

💾100 groups data logging

🔆LCD backlight display

⚙️50-19999 RPM range

62507CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Measure Like a Pro, Lead Like a Boss!

DATA DRIVEN DECISIONS - Store and analyze up to 100 data groups with max, min, and average functions.
ALL IN ONE CONTACT KIT - Includes 5 contact rollers and accessories for diverse industrial and mechanical applications.
WORK ANYTIME ANYWHERE - Bright LCD backlight and auto power-off maximize usability and battery life.
VERSATILE MEASUREMENT MODES - Switch effortlessly between 5 units including m/min and ft/sec for tailored data.
PRECISION AT YOUR FINGERTIPS - High-speed 16-bit chip ensures ultra-stable and reliable RPM readings.

The Protmex PT6208A Digital Contact Tachometer delivers precise rotational speed measurements from 50 to 19,999 RPM with a robust 16-bit chip and ergonomic ABS shell. Featuring 100 data logs, multiple unit options, and a bright backlit LCD, it’s engineered for professionals demanding accuracy and convenience across industries—from automotive to manufacturing. Backed by 24/7 support and certified quality, it’s the ultimate tool for speed measurement and analysis.

Specifications

ASIN	B01F7AA20K
Best Sellers Rank	#31,650 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Industrial Tachometers
Brand Name	Protmex
Customer Reviews	4.0 4.0 out of 5 stars (359)
Included Components	1* 6 inch idler wheel; 1* 0.1m idler wheels; 2* touch tips; 1* Lengthening bar
Item Dimensions	7.6 x 2.36 x 1.14 inches
Item Weight	200 g
Manufacturer	Peakmeter
Material Type	Plastic
Model	PT6208A Contact Tachometer
Number of Items	1
Number of Packs	1
Part Number	peakmeter
UPC	762640504958 762640506396
Unit Count	1 Count

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