PIC Gauges 4" Liquid-Filled Pressure Gauge — Lower Mount, 1/2" NPT, Stainless Case
| Specifications (As Configured) | |
|---|---|
 Vendor |
PIC Gauges
|
 SKU |
201L-402B
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The PIC Gauges 200 Series is a rugged, glycerine-filled industrial pressure gauge built for applications where vibration and pressure pulsation would quickly wear out a dry gauge. The 4" dial gives clear, at-a-glance readability, while the liquid fill dampens needle flutter and lubricates the internals for longer service life. Bottom (lower) mount with a 1/2" male NPT connection.
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: 1/2" male NPT, lower (bottom) mount
- Case & bezel: stainless steel
- Internals: copper alloy (brass) movement and socket
- Fill: glycerine (liquid-filled) for vibration and pulsation damping
- Lens: polycarbonate
- Accuracy: ±1% of full scale (ASME B40.100 Grade 1A)
- Operating temperature: approx. -4°F to 150°F
- Ranges: vacuum, compound, and pressure from 0-15 PSI up to 0-15,000 PSI
Typical applications
Air compressors, pumps, hydraulic systems, water and process lines, and any service with vibration or rapid pressure cycling where a standard dry gauge would fail prematurely.
Select your required range from the dropdown. The PIC Gauges 4" liquid-filled, lower-mount, 1/2" NPT stainless steel pressure gauge is a dependable, long-life choice for compressor and industrial pressure indication.
NOTE: Actual product may be different from pictured!
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