Stainless Steel Liquid Filled Pressure Gauge – 4" Dial, 1/4" NPT Center Back Mount (202L Series)
| Specifications (As Configured) | |
|---|---|
 Vendor |
Warthog
|
 SKU |
202L-404B
|
The 202L Series liquid-filled pressure gauge delivers accurate, vibration-resistant readings in demanding industrial and air-compressor applications. Its glycerine fill dampens pulsation and vibration while continuously lubricating the internal movement, extending service life and keeping the pointer steady and easy to read.
Built with a rugged stainless steel case and bezel, brass internals, and a phosphor bronze Bourdon tube, this 4" gauge mounts cleanly from the rear via a 1/4" male NPT center back connection — ideal for panel and gauge-board installations.
Which range should you choose?
Pick the range type that matches what your system does:
- Pressure (e.g. 0–100 PSI): Positive pressure only — what almost every air-compressor and shop-air job needs.
- Compound (e.g. 30 inHg vacuum to 100 PSI): Reads both vacuum and positive pressure on one dial — for systems that pull suction and also build pressure.
- Vacuum only (0 to 30 inHg): Suction / negative pressure only.
What does "inHg" mean? It stands for inches of mercury — the standard unit gauges use to measure vacuum, meaning pressure below normal atmospheric pressure (in other words, suction). 0 inHg is ordinary atmospheric pressure, and about 30 inHg is a near-complete vacuum — roughly 14.7 PSI of suction. So a gauge marked "30 inHg" reads the entire vacuum range, from no suction down to full vacuum. (By comparison, PSI measures pressure above atmospheric.)
Key Specifications
- Dial size: 4" (100 mm)
- Connection: 1/4" Male NPT, center back mount
- Case & bezel: Stainless steel
- Internals: Brass socket & movement, phosphor bronze Bourdon tube
- Fill: Glycerine (liquid filled)
- Lens: Polycarbonate
- Accuracy: ±1% of span (ASME B40.100 Grade A)
- Operating temperature: 30°F to 160°F
- Dial: Dual scale, PSI and BAR/kPa
- Ranges available: 30 inHg vacuum and compound through 0–15,000 PSI
Applications
Air compressors, hydraulic systems, pumps, and process equipment where vibration or pulsation would shorten the life of a dry gauge.
Select your required pressure range from the options above. Each gauge ships ready to install with a 1/4" NPT center back connection and dual PSI/BAR dial markings for fast, accurate reads.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
We offer Financing Through Many Different Avenues:
- Affirm is great for smaller purchases. You can do this during checkout.
- Clicklease is a great option for Instant decisions up to 25k. NO Hard credit pull. No Time in Business Required. More information can be found out about it here: https://www.clicklease.com/partner/warthog-air-compressor-store
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