can you run the wires for power directly to the power switch on my wood lathe?

Hello; The requirement for the 4-digit counter is a DC voltage between 8 and 15 VDC. Your switch, I presume, switches 120VAC to the lathe if you live in the U.S., and 240VAC if you live in Europe, England, or a few other countries. It would make for a nice fireworks display if you connected this device to a higher AC voltage. What I did was to buy a small 120VAC to 12VDC low current power supply, and it was about the size of a small box of matches, perhaps an inch (25mm) on the longest side. The power supply and display come on with the switch, and report on my lathe's RPM just nicely. I hope this helps, best of luck, Ken

what is the thread pitch of the Hall sensor threads

12 mm x 1 mm pitch. Kind of an oddball size. Hope this helps

Can I use a 3/16" or 1/4" dia. magnet that is longer, so I can drill a hole in a pulley, so it can't fly off?

Your probably better off with a drop of 2 part epoxy or super glue. By drilling the pulley and replacing with a different density material you may change the balance and induce vibration. I just let the magnet hold it on my wood lathe shaft so far to 1200rpm.

I have a vfd suppling power to a 3 phase motor, the vfd has a terminal with 10vdc output connection but only allows 10ma is that enough power to run

Enough power to light up a small LED but nothing else.

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DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt

DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt

Product ID: 28592239

Details

Brand
DIGITEN
Item Weight
3.5 ounces
Item dimensions L x W x H
2.8 x 0.8 x
Material
Number of Items
1

⚡DC 8-15V power range

💡0.56" bright green LED display

🔢5-9999 RPM measurement range

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Description

🚀 Elevate your machine monitoring with precision and style!

SMART AUTO ZEROING - Automatic zero reset keeps your readings fresh and reliable
PRECISION RPM TRACKING - Accurate ±2-3 RPM readings for flawless motor monitoring
INSTANT VISUAL FEEDBACK - Bright green LED display ensures clear, real-time RPM data
UNIVERSAL COMPATIBILITY - Works seamlessly with lathes, CNC, conveyors, and more
PLUG PLAY SENSOR SETUP - Hall proximity sensor with magnet for effortless installation

The DIGITEN 4 Digital Green LED Tachometer is a high-precision RPM speed meter designed for professional use in lathes, CNC machines, conveyors, and more. Powered by DC 8-15V, it measures speeds from 5 to 9999 RPM with ±2-3 accuracy, displayed on a crisp 0.56" green LED. Featuring an included Hall proximity sensor and magnet, it offers easy installation and reliable real-time RPM tracking, making it an essential tool for efficient industrial and mechanical monitoring.

Specifications

ASIN	B01FQMI18Y
Best Sellers Rank	#30,855 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Tachometers
Brand	DIGITEN
Brand Name	DIGITEN
Customer Reviews	4.3 out of 5 stars 727 Reviews
Item Dimensions	2.8 x 0.8 x 1.4 inches
Item Weight	3.5 ounces
Item dimensions L x W x H	2.8 x 0.8 x 1.4 inches
Manufacturer	DIGITEN
Material	PLA_(Polylactic_Acid), PE_(Polyethylene)
Material Type	PLA_(Polylactic_Acid), PE_(Polyethylene)
Model	5823950920
Number of Items	1
Part Number	RPM1204GHA
Unit Count	1 Count
Voltage	12 volts

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€ 42.57

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In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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TrustScore 4.5 | 7,300+ reviews

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