We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 78 in Overall Lg, Top & Side Read - Magnetic I-Beam Levels
JOHNSON LEVELMagnetic I-Beam Levels

JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 78 in Overall Lg, Top & Side Read

The JOHNSON LEVEL I-Beam Level: Level & Plumb (MPN 3878) is a 78-inch magnetic I-beam level constructed with an aluminum frame and acrylic vials. It features Top & Side Read capability and includes Rare Earth magnets…

SKU 3G-OTH-297365

Brand
JOHNSON LEVEL
Item
I-Beam Level: Level & Plumb, I-Beam, 78 in Overall Lg, Top & Side Read
Category
Magnetic I-Beam Levels
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

JOHNSON LEVEL
Manufacturer Part Number
3878
Type
I-Beam, Top & Side Read, Rare Earth – 1
Overall Lg
78 in

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

JOHNSON LEVEL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The JOHNSON LEVEL I-Beam Level: Level & Plumb (MPN 3878) is a 78-inch magnetic I-beam level constructed with an aluminum frame and acrylic vials. It features Top & Side Read capability and includes Rare Earth magnets for secure attachment to ferrous surfaces.

Frequently Asked Questions

What is the JOHNSON LEVEL 3878 I-Beam Level used for?

The JOHNSON LEVEL 3878 I-Beam Level is used for precision leveling and plumbing in construction, framing, and industrial applications. Its 78-inch length and Rare Earth magnets allow secure attachment to steel beams, making it ideal for structural alignment, concrete formwork, and heavy equipment setup.

What are the specifications of the JOHNSON LEVEL 3878?

The JOHNSON LEVEL 3878 is a 78-inch magnetic I-beam level with an aluminum frame and acrylic vials. It features Top & Side Read vials for visibility from multiple angles and Rare Earth magnets for strong ferrous-surface grip. The manufacturer part number is 3878.

Where to buy the JOHNSON LEVEL 3878 worldwide?

You can source the JOHNSON LEVEL 3878 I-Beam Level through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this JOHNSON LEVEL model.

How to maintain a JOHNSON LEVEL I-Beam Level?

To maintain your JOHNSON LEVEL I-Beam Level, clean the aluminum frame and acrylic vials with a soft, damp cloth after use. Avoid dropping the level or exposing it to extreme temperatures, which can affect vial accuracy. Store it horizontally in a dry area to prevent warping.

Used in

Common applications for JOHNSON LEVEL
Construction framing – Johnson Level torpedo level (MPN 1411-0900) for checking plumb and level on studs and joists
Metal fabrication – Johnson Level combination square (MPN 400) for layout and squaring of sheet metal
Drywall installation – Johnson Level drywall T-square (MPN JTS481) for cutting and aligning gypsum boards
Machinery alignment – Johnson Level bullseye level (MPN 100) for leveling equipment bases in all directions
Distance measurement – Johnson Level laser distance meter (MPN LDM85) for room dimensions in facility layout
Surveying and laser setup – Johnson Level elevating tripod (MPN 40-6330) for mounting laser levels on uneven terrain

JOHNSON LEVEL Products

3G Electric supplies JOHNSON LEVEL magnetic i-beam levels. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, None Acrylic (MPN 3724)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, None Acrylic (MPN 3724)
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, 0, 1 mm/m (MPN 1300-4800)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, 0, 1 mm/m (MPN 1300-4800)
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, 1, 1 mm/m (MPN 3748)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, 1, 1 mm/m (MPN 3748)
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, 0, 1 mm/m (MPN 1300-2400)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, 0, 1 mm/m (MPN 1300-2400)
JOHNSON LEVEL I-Beam Level: Level, Plumb & 45° Angle, I-Beam, 48 in Overall Lg, Side Read Only, 0 (MPN 7748-O)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level, Plumb & 45° Angle, I-Beam, 48 in Overall Lg, Side Read Only, 0 (MPN 7748-O)
JOHNSON LEVEL I-Beam Level: Level, Plumb & 45° Angle, I-Beam, 24 in Overall Lg, Side Read Only, 0 (MPN 7724-O)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level, Plumb & 45° Angle, I-Beam, 24 in Overall Lg, Side Read Only, 0 (MPN 7724-O)

More from JOHNSON LEVEL

View all JOHNSON LEVEL parts
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, Rare Earth – 1 (MPN 3848)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 48 in Overall Lg, Top & Side Read, Rare Earth – 1 (MPN 3848)
JOHNSON LEVEL Aluminum Level: Level & Plumb, I-Beam, Cushioned, Cushioned, 48 in Overall Lg, 0.029° (MPN 1254-4800)
JOHNSON LEVEL
JOHNSON LEVEL Aluminum Level: Level & Plumb, I-Beam, Cushioned, Cushioned, 48 in Overall Lg, 0.029° (MPN 1254-4800)
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, Rare Earth – 1 (MPN 3824)
JOHNSON LEVEL
JOHNSON LEVEL I-Beam Level: Level & Plumb, I-Beam, 24 in Overall Lg, Top & Side Read, Rare Earth – 1 (MPN 3824)
JOHNSON LEVEL Aluminum Level: Level, Plumb & 45° Angle, I-Beam, Cushioned, Cushioned, Strip – 1 (MPN 1254-2400)
JOHNSON LEVEL
JOHNSON LEVEL Aluminum Level: Level, Plumb & 45° Angle, I-Beam, Cushioned, Cushioned, Strip – 1 (MPN 1254-2400)