Brüder Mannesmann Battery Acid Tester 040-T | Hydrometer for Lead-Acid Batteries

Measure the specific gravity of battery electrolyte from 1.10 to 1.30 kg/l with this glass hydrometer, featuring a color-coded scale for instant charge status.

Overview

The Brüder Mannesmann 040-T battery acid tester is a manual hydrometer for checking the charge state and condition of lead-acid batteries. It draws electrolyte into a glass tube via a rubber bulb, where a float with a numerical and color-coded scale indicates the specific gravity. Green means charged, yellow partially discharged, and red indicates the battery needs charging.

What stands out

• Direct reading of specific gravity from 1.10 to 1.30 kg/l
• Color-coded scale: green, yellow, red
• Glass body with rubber suction bulb and nozzle
• Length approximately 250 mm
• For automotive, motorcycle, truck, marine, and industrial lead-acid batteries

Technical details

• Product type: Battery acid hydrometer
• Measurement method: Specific gravity (density)
• Compatible battery types: Lead-acid batteries (e.g., SLI, deep cycle)
• Measurement range: 1.10 - 1.30 kg/l
• Scale type: Integrated float with color-coded and numerical scale
• Color code indication: Green (charged), yellow (partially discharged), red (discharged/needs charging)
• Main body material: Glass
• Suction bulb material: Rubber
• Nozzle/tube material: Rubber/plastic
• Overall length: 250 mm
• Operating principle: Buoyancy of float in electrolyte
• Temperature compensation: Manual (readings calibrated for 20°C)

Our verdict

A simple, reliable tool for anyone maintaining lead-acid batteries. The color-coded scale makes it easy to see when a battery needs attention.