can it read digital gage?

It can be read at 240-33 ohms, is your digital meter letter point at 240-33? What are the most readable signal points of your digital meter

can this be used on a regular truck fuel tank?

Sure, your tank will need to accept a gauge from the top down then verify the OHMs needed for your gauge and then the length of the unit to make sure it will reach the bottom of your tank for a complete reading and finally the bolt pattern of the sending unit to match your tank or you will need to make an adapter.

On a new installation would tapping a 3/8 inch aluminum plate for mounting screw holes(5) be sufficient ?

The aluminum plate would have to be thick enough to allow you to tighten the screws down very firmly, but I think it could work.

Does this need a sealant in addition to the gasket on a Moeller 12 Gal High Profile tank due to the rough surface of a Moeller?

I would use permatex form a gasket as a sealant

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100TECH Marine Fuel Sending Unit Float Replacement 18"(460mm) for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohms

Product ID: 382431301

Details

Brand
100Tech
Current rating
33 Amps
Item weight
1 Pounds
Material
Stainless nbr
UPC
721703918026

📏18" (460mm) Precision Length

🔧SAE 5-Hole Mounting Pattern

⚙️316 Stainless Steel Durability

₪733

Duties & taxes included

In stock

Sold byAmazon IsraelDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⛵ Elevate your fuel monitoring game with precision & durability that won’t quit!

UNIVERSAL COMPATIBILITY - Works seamlessly with fuel & water gauges across boats, RVs, and vehicles.
RUGGED IP 65 RATED CONSTRUCTION - Built to withstand harsh marine and industrial environments.
ACCURATE 240 33 OHM OUTPUT SIGNAL - Standard American output ensures flawless gauge readings every time.
PRECISION FIT EASY INSTALLATION - Direct replacement with included gasket & screws for hassle-free setup.
UNMATCHED DURABILITY WITH JAPANESE OKI REED SWITCH - Experience rock-solid reliability with no moving parts to fail.

The 100TECH Marine Fuel Sending Unit is a premium 18" (460mm) stainless steel sensor featuring a durable Japanese OKI Reed Switch for reliable, maintenance-free fuel and water level measurement. Designed with a standard SAE 5-hole mounting pattern and IP65 protection, it fits boats, RVs, and vehicles perfectly. Its 240-33 ohm output ensures accurate gauge readings, backed by easy installation with included hardware and a 1-year warranty plus lifetime support.

Specifications

ASIN	B098MG449K
Best Sellers Rank	916,954 in Automotive ( See Top 100 in Automotive ) 19,057 in Car Switches
Brand	100Tech
Current Rating	33 Amps
Customer Reviews	4.4 4.4 out of 5 stars (13)
Item Weight	1 Pounds
Manufacturer	100TECH direct
Manufacturer Part Number	18C5-BY460
Material	Stainless Steel nbr
Model Number	18C5-BY460
UPC	721703918026
Unit Count	1.0 count

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