Can this digital flow meter be used on a gravity feed diesel line?

It should, as long as the pressure created on the discharge side is above 15 PSI. Please note this meter only goes down to 2 gallons. https://www.fillrite.com/index.cfm/products/productdetail/?p=615&ps=93

Can I use this meter to measure how much fuel and engine is using? Will it measure flow rates lower than 2 gpm?

Unfortunately, this will not measure flow rates lower than 2 GPM.

can it be used to see constant flow for glychol in a closed loop system to verify rate of flow

Yes, the meter can be put into RATE mode that displays flow rate. You may want to consider using the TT10PN, polymer version for Glycols as an option too.

Can this be used for detergent solutions?

You will want to use the TT10PN for detergent solutions.

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Description

⛽ Measure with Mastery — Fuel your flow like a pro!

EASY INTEGRATION - Standard 1" female NPT threaded connections for seamless installation on existing systems.
RUGGED DURABILITY - Polypropylene body, FKM seals, and stainless steel internals ensure long-lasting outdoor and chemical resistance.
RELIABLE POWER SOURCE - Powered by two included AA batteries for hassle-free, portable operation wherever you need it.
PRECISION FLOW CONTROL - Accurate digital readings with ±2% precision for total confidence in every drop.
VERSATILE MEASUREMENT UNITS - Switch effortlessly between ounces, pints, quarts, liters, gallons, or custom units to fit your workflow.

The Fill-Rite 820 Digital Nutating Disc Fuel Transfer Meter delivers precise flow measurement from 2 to 20 GPM with ±2% accuracy. Built with corrosion-resistant materials and powered by AA batteries, it supports multiple units of measure and fits standard 1" NPT connections, making it a durable, versatile choice for fuel, water, and mild chemical transfer.

Specifications

ASIN	B000EGHMIS
Best Sellers Rank	#170,576 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #126 in Flowmeters
Date First Available	October 10, 2007
Is Discontinued By Manufacturer	No
Item Weight	1.3 pounds
Item model number	820
Manufacturer	Fill-Rite Company
Product Dimensions	5 x 6 x 6 inches

Reviews

F**Y

Exact match, great price

This was ordered as a replacement for one used on a field service oil dispensing system for genset engines. Our local supplier of this equipment had on of these on hand... but his markup was 200+% of what I paid for this one from Amazon!

17.01.2014

C**L

Five Stars

Larger than the picture portrays but very sturdy and accurate.

9.03.2015

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