What is the Facom 784B used for?

You use this hydrometer to accurately measure and check the specific gravity and density of battery fluid.

What are the dimensions of this battery hydrometer?

It has a total length of 480 mm, a tube diameter of 21 mm, a bulb of 43 x 93 mm, and a 70 mm rubber hose.

Which applications is this tool suitable for?

It is designed for automotive and workshop use to diagnose the condition and charge level of lead-acid batteries.

How much does the Facom 784B weigh?

The net weight of this hydrometer is 100 grams.

FACOM 784B sourdough

Name: FACOM 784B sourdough
Brand: FACOM
SKU: 41299578
Price: 30.6 EUR
Availability: InStock

Supplier number: FACOM 784B | EAN 3148512008101

Recommended Retail Price €47.18

30.60 tax incl.

€25.29 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered as of 05/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Lifetime warranty on Facom? Or limited in time? Read more about it here.

✆ Talk to a specialist

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EXPERT E200405 sourdough

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Delivery time average 8 days.

Accurate testing of battery electrolyte

Practical benefits

Reliable Facom 784B hydrometer: You quickly determine the specific gravity of battery fluid to evaluate the charge and cell health.
Simple and clean suction: The flexible rubber bulb allows you to draw electrolyte smoothly and safely without spills.
Direct and clear readout: The calibrated float inside the clear tube lets you read the measurement values instantly and accurately.

In a nutshell

The right choise for

With the Facom 784B battery hydrometer, you quickly gain accurate insight into the charge level and overall health of lead-acid batteries. This diagnostic tool allows you to measure the specific gravity and density of electrolyte fluid precisely, helping you identify weak, undercharged, or failing cells without relying solely on terminal voltage. Thanks to the flexible suction bulb and rubber hose, you draw battery acid smoothly and cleanly. The clear scale inside the transparent tube provides an immediate, reliable readout of every measurement. Weighing only 100 grams with a total length of 480 mm, it makes routine battery maintenance in the workshop fast and efficient.

Product information FAQ

€30.60

In stock - tax incl.

Key features according to our expert

Supplier warranty: FACOM - Legal warranty applicable

Product description

Acid weigher

Features

Measures the specific gravity of battery acid.
Diameter: 42 to 350 mm.

All Features

Supplier warranty: FACOM - Legal warranty applicable
Length of suction pipe (mm): 350

Brand FACOM
41299578
EAN 3148512008101
Supplier number FACOM 784B
Warranty Lifetime warranty on Facom? Or limited in time? Read more about it here.

Frequently asked questions about this product

Answered by specialists

What is the Facom 784B used for?: You use this hydrometer to accurately measure and check the specific gravity and density of battery fluid.
What are the dimensions of this battery hydrometer?: It has a total length of 480 mm, a tube diameter of 21 mm, a bulb of 43 x 93 mm, and a 70 mm rubber hose.
Which applications is this tool suitable for?: It is designed for automotive and workshop use to diagnose the condition and charge level of lead-acid batteries.
How much does the Facom 784B weigh?: The net weight of this hydrometer is 100 grams.