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

3G Electric
LDI INDUSTRIES Vented Oil Level Gauge - Vented Oil Level Gauges
LDI INDUSTRIESVented Oil Level Gauges

LDI INDUSTRIES Vented Oil Level Gauge

The LDI INDUSTRIES Vented Oil Gauge (SKU G421-4, MPN G421-4) is a vented oil level gauge with a 6.23 in body height and 4 1/4 in sight height. It features a 1/2" NPTF female connection, a Buna N seal, and a maximum…

SKU 3G-OTH-592820

Also listed as: G4214 · G421 4

Brand
LDI INDUSTRIES
Item
Vented Oil Level Gauge
Part Number
G421-4
Category
Vented Oil Level Gauges
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

LDI INDUSTRIES
Manufacturer Part Number
G421-4
Sight Ht
4 1/4 in
NPTF Female
1/2"
Seal Material
Buna N
Max. Temp Rating
250°F
Includes Thermometer
No Thermometer Included
Compatible with Series
G400 Series

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

LDI INDUSTRIES Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LDI INDUSTRIES Vented Oil Gauge (SKU G421-4, MPN G421-4) is a vented oil level gauge with a 6.23 in body height and 4 1/4 in sight height. It features a 1/2" NPTF female connection, a Buna N seal, and a maximum temperature rating of 250°F. This gauge is compatible with the G400 Series and does not include a thermometer.

Frequently Asked Questions

What is a vented oil gauge used for?

A vented oil gauge provides a clear visual indication of oil level in reservoirs, gearboxes, and hydraulic tanks. The vent allows pressure equalization, preventing seal damage. LDI INDUSTRIES gauges like the G421-4 are common in industrial machinery, pumps, and compressors where reliable level monitoring is critical.

What are the specifications of the LDI INDUSTRIES G421-4 vented oil gauge?

The LDI INDUSTRIES G421-4 vented oil gauge has a 6.23 in body height, 4 1/4 in sight height, and a 1/2" NPTF female connection. It uses a Buna N seal, has a maximum temperature rating of 250°F, and is compatible with the G400 Series. No thermometer is included.

Where to buy LDI INDUSTRIES G421-4 vented oil gauge worldwide?

3G Electric supplies the LDI INDUSTRIES G421-4 vented oil gauge to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this gauge.

How to install a vented oil gauge like the G421-4?

Install the LDI INDUSTRIES G421-4 vented oil gauge into a 1/2" NPTF female port using thread sealant on the male threads. Tighten to manufacturer torque specs, ensuring the sight glass is vertical for accurate reading. The vent must remain unobstructed for proper pressure equalization.

Used in

Common applications for LDI INDUSTRIES
Hydraulic power units — LDI Industries pump motor adapters (e.g., MPN 6028) connect electric motors to hydraulic pumps in industrial machinery.
Mobile equipment — LDI Industries SAE B 4-bolt adapters (e.g., MPN 1952) used in construction vehicle hydraulic systems.
Gas engine-driven pumps — LDI Industries gas engine/pump adapter (MPN 6019) interfaces PEM-G flange engines with SAE A pumps.
Hydraulic tank fabrication — LDI Industries steel return flanges (e.g., MPN 5111) welded onto reservoirs for fluid return ports.
Maintenance replacement — LDI Industries pump motor adapters (e.g., MPN 1960) replace worn or incompatible adapters in existing hydraulic systems.
Industrial automation — LDI Industries adapters (e.g., MPN 1950) used in stationary hydraulic presses and material handling equipment.
Not sure this is the right part? Photo-identify it

LDI INDUSTRIES Products

3G Electric supplies LDI INDUSTRIES vented oil level gauges. 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

More from LDI INDUSTRIES

View all LDI INDUSTRIES parts
Vented oil level gauge for visual indication of lubricant level in reservoirs or gearboxes. Allows air escape to prevent pressure buildup. Features 2 1/4 in sight height, 1/4" NPTF female connection, Buna N seal, and 250°F max temperature rating. No thermometer included. Compatible with G400 Series
LDI INDUSTRIES
Vented oil level gauge for visual indication of lubricant level in reservoirs or gearboxes. Allows air escape to prevent pressure buildup. Features 2 1/4 in sight height, 1/4" NPTF female connection, Buna N seal, and 250°F max temperature rating. No thermometer included. Compatible with G400 Series
Vented oil level gauge with 4 1/4 in sight height and 1/2" NPTF male connection. Buna N seal rated for 250°F maximum temperature. Suitable for visual oil level indication in gearboxes, compressors, and hydraulic reservoirs. Compatible with G260 Series
LDI INDUSTRIES
Vented oil level gauge with 4 1/4 in sight height and 1/2" NPTF male connection. Buna N seal rated for 250°F maximum temperature. Suitable for visual oil level indication in gearboxes, compressors, and hydraulic reservoirs. Compatible with G260 Series
Vented oil level gauge for visual indication of lubricant level in reservoirs or gearboxes. Features a 4 1/4 in sight height, 1/4" NPTF male connection, Buna N seal, and 250°F max temperature rating. Compatible with G300 Series. No thermometer included
LDI INDUSTRIES
Vented oil level gauge for visual indication of lubricant level in reservoirs or gearboxes. Features a 4 1/4 in sight height, 1/4" NPTF male connection, Buna N seal, and 250°F max temperature rating. Compatible with G300 Series. No thermometer included

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first