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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Protmex PT6208A Digital Contact Tachometer - 50-19999RPM Speed Meter | Contact Measurement Speed Tachometer with 100 Groups Data Logging, Data Hold, Max/Min/AVG, Backlight

Product ID: 31001811

Details

Brand
Protmex
Item Highlight
Contact Speed
Item Weight
200 g
Item dimensions L x W x H
7.6 x 2.36 x
Material
Plastic

💾100 groups data logging

🔆LCD backlight display

⚙️50-19999 RPM range

¥13083

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Description

⚡ Master speed with precision — don’t let your projects fall behind!

DATA DRIVEN DECISIONS - Store and analyze up to 100 data groups with max, min, and average functions for smarter maintenance.
WORK ANYTIME ANYWHERE - Bright LCD backlight and low battery auto-shutdown keep you powered and productive in any environment.
TAILORED FOR EVERY TASK - Includes 5 contact rollers and accessories to measure speeds across motors, conveyors, fans, and more.
VERSATILE MEASUREMENT MODES - Switch effortlessly between 5 units (m/min, m/sec, ft/min, ft/sec, in/min) to suit any project.
PRECISION AT YOUR FINGERTIPS - 16-bit high-speed chip ensures ultra-stable, reliable RPM readings every time.

The Protmex PT6208A Digital Contact Tachometer delivers precise RPM measurements from 50 to 19,999 with a robust 16-bit chip and ergonomic ABS double-layer shell. Featuring 5 selectable units, 100 data logging groups, and a bright LCD backlight, it’s engineered for professionals demanding accuracy and versatility across industrial and mechanical applications. Backed by 24/7 support and certified quality, it’s the ultimate tool for speed monitoring and maintenance.

Specifications

ASIN	B01F7AA20K
Best Sellers Rank	#33,688 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Industrial Tachometers
Brand Name	Protmex
Customer Reviews	4.0 4.0 out of 5 stars (363)
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 Highlight	Contact Measurement Speed Tachometer with 100 Groups Data Logging, Data Hold, Max/Min/AVG, Backlight
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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¥13083

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

2 months ago

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Customer service was outstanding when I had questions about the product.

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