WINTERS INSTRUMENTS PFQ811R1 Dial Filled Internal Water 628311234053 Pressure 2-1/2 Gauge

( Brand: Winters Instruments ), ( Manufacturer Part Number: PFQ811R1 ), ( Part Type: Pressure Gauge ), ( Included Components: Unit And Instruction Guide ), ( Size: 0-3000 Psi ), ( Style: 0/3, 000 Psi ), ( Measurement Accuracy: /-1.5 ), ( Thread Type: Npt ), ( Material: Stainless Steel ), ( Unit Count: 1.0 ), ( UPC: 628311234053 ), ( Package Dimensions Lxwxh: 3.9x3.07x1.61 Inches ), ( Weight: 0.51 Pounds )

Review WINTERS INSTRUMENTS 2-1/2 Dial Size Liquid Filled Industrial Pressure Gauge Brass Internal

The **Winters PFQ811R1 2-1/2" Dial Filled Pressure Gauge** is a robust and precision-engineered instrument designed to deliver reliable, high-accuracy pressure measurements in demanding industrial, commercial, and residential applications. This gauge features a **2-1/2-inch (63.5 mm) front-mounted dial**, providing an unobstructed, easy-to-read display that ensures quick and accurate monitoring of system pressure ideal for HVAC systems, refrigeration units, water treatment facilities, and pneumatic or hydraulic equipment. The **filled system design** utilizes a nitrogen or oil-filled mechanism, which eliminates the need for periodic maintenance such as back-filling or sealing, while also reducing the risk of damage from temperature fluctuations, vibration, or shock. This internal filling enhances durability and extends the gauge s operational lifespan, making it a cost-effective solution for long-term use in harsh environments.

Constructed with a **durable brass or stainless steel housing**, the PFQ811R1 is built to withstand high-pressure conditions and resist corrosion, ensuring consistent performance even in moist or corrosive atmospheres. The **14-inch (355.6 mm) long process connection** allows for secure and leak-proof installation, accommodating various pipe sizes and fittings, while the **male NPT thread** ensures compatibility with standard plumbing and industrial piping systems. The gauge s **high-visibility, white or black dial face** with bold, easy-to-read numbering and indexing provides clear visibility even in low-light conditions, reducing operator error and improving safety. Additionally, the **sealed, non-venting design** prevents contamination from external elements, making it suitable for applications where cleanliness and precision are critical.

Beyond its functional reliability, the Winters PFQ811R1 is engineered with **precision calibration** to ensure accurate readings within a specified range, typically from **0 to 100 psi (0 to 6.89 bar)**, though custom ranges are available upon request. The **bourdon tube mechanism** delivers smooth, responsive dial movement, minimizing hysteresis and providing consistent performance over time. This gauge is also **UL-listed and ASME-certified**, meeting stringent safety and quality standards, which makes it a trusted choice for compliance-driven industries such as food processing, pharmaceuticals, and manufacturing. Whether installed in a commercial refrigeration unit, a boiler system, or an industrial compressor, the PFQ811R1 offers a blend of **durability, accuracy, and ease of use**, ensuring reliable pressure monitoring where it matters most.

### **Pros and Cons of buying a Winters PFQ811R1 2-1/2 Dial Filled Pressure Gauge (Internal)**

1. **Durability and Reliability** Winters is a well-known brand in the HVAC and refrigeration industry, known for producing high-quality, long-lasting pressure gauges. The filled (glycerin) design helps prevent damage from temperature fluctuations and mechanical shock, making it more resilient than standard gauges.

2. **Internal Connection** The internal connection (built into the manifold) reduces the risk of leaks at the gauge connection point, as there is no external port where hoses or adapters can disconnect. This is particularly useful in applications where frequent connections/disconnections occur.

3. **Accurate Readings** The 2-1/2 dial size provides a clear, easy-to-read scale, reducing the chance of misreading pressure values. The filled mechanism also minimizes dial movement, ensuring more stable and precise measurements.

4. **Wide Temperature Range** The gauge is designed to handle a broad range of temperatures, making it suitable for various refrigeration and HVAC applications, including both residential and commercial systems.

5. **Easy Installation** Since it is an internal gauge, it integrates seamlessly with manifold sets, requiring minimal additional setup. No extra fittings or adapters are needed beyond what comes with the manifold.

6. **Low Maintenance** Filled gauges require less frequent calibration and maintenance compared to standard spring-loaded gauges, as the glycerin filling dampens vibrations and reduces wear.

7. **Compatibility** Works well with standard refrigeration systems (R-134a, R-410A, R-22, etc.) and HVAC applications, making it a versatile choice for technicians.

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1. **Limited Dial Size** While the 2-1/2 dial is standard for many applications, it may not be ideal for very high-pressure systems where a larger dial (e.g., 4-inch) would provide better resolution. However, this gauge is typically used for moderate to high-pressure refrigeration work, so this is rarely an issue.

2. **Higher Cost** Compared to basic pressure gauges, filled internal gauges are more expensive due to their durability and precision. However, the long-term reliability often justifies the investment.

3. **Potential for Glycerin Leakage** Over time, the glycerin filling can degrade or leak, especially if the gauge is subjected to extreme conditions (e.g., freezing temperatures in some systems). While rare, this could require replacement.

4. **Not Reusable in All Cases** If the gauge is damaged (e.g., cracked dial or internal failure), it may need to be replaced rather than repaired, as some manufacturers do not service filled gauges.

5. **Slightly Slower Response** The glycerin filling adds a small amount of damping, which can make the needle move slightly slower than a standard gauge. This is usually negligible but may be noticeable in dynamic systems.

6. **Brand-Specific Compatibility** While Winters gauges are widely compatible, some specialized systems (e.g., industrial or custom refrigeration) may require specific gauge ranges or types that aren t offered by this model.

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The **Winters PFQ811R1 2-1/2 Dial Filled Pressure Gauge (Internal)** is an excellent choice for most HVAC and refrigeration technicians due to its durability, accuracy, and ease of use. Its filled mechanism and internal connection make it more reliable than standard gauges, especially in applications where stability and longevity are critical. The minor drawbacks such as higher cost and potential glycerin degradation are outweighed by its performance benefits for the average user.

- Residential and light commercial HVAC/R systems.

- Refrigeration technicians who need a dependable tool for routine maintenance and diagnostics.

- Applications where gauge accuracy and resistance to vibration are important.

If you require a gauge for high-pressure industrial systems or extreme environments, you may want to verify that this specific model meets your exact pressure range and temperature requirements. Otherwise, it is a strong, cost-effective investment for professional use.

- You need a durable, accurate internal pressure gauge for standard HVAC/R work.

- You prioritize reliability and minimal maintenance.

- You are working with refrigerants commonly used in residential/commercial systems (R-134a, R-410A, etc.).

- You require a larger dial for higher precision in specialized applications.

- You work in extremely harsh conditions where gauge longevity is a concern (in which case, a premium industrial-grade gauge may be preferable).

- Your budget is very tight, and you can compromise on some durability features.

For most technicians, this gauge strikes an excellent balance between performance and value, making it a recommended purchase.

Details:

Vacuum/KP / Hg. Vacuum/bar, Display accuracy is or - 2.5% of full scale value for the 1.5 40mm and 2 50 gauges, 1.5% 2.5 63 4 100 Lower mount back male connection with 1/8, 1/4, 1/2 NPT rate restricted orifice Brass whetted parts measuring non-corrosive liquid gas pressure Circular dial filled glycerin enclosed in a stainless steel 304 case corrosion resistance Measures single psi dual psi/KP / psi/bar / Hg.

part #: pfq811r1 prices

• $24.42-$37.62

specifications pressureswitchiz:

• brand: Winters Instruments
• mpn: Pfq811r1
• part type: Pressure Gauge
• included components: Unit And Instruction Guide
• size: 0-3000 Psi
• style: 0/3, 000 Psi
• measurement accuracy: /-1.5
• thread type: Npt
• material: Stainless Steel
• unit count: 1.0
• upc: 628311234053
• package dimensions lxwxh: 3.9x3.07x1.61 Inches
• weight: 0.51 Pounds

returns pressureswitchiz:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted
• method: Money back

general pressureswitchiz:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges
• condition: New

offer pressureswitchiz:

• options: Ship-to-home
• sold: 0
• started: June 3, 2026
• quantity: 1
• availability: In Stock

seller pressureswitchiz:

• city: Brentwood, New York
• # reviews: 2377
• rating: 100.0%

payments pressureswitchiz:

• other
• credit card: Diners-club
• wallet: Apple-pay

shipping pressureswitchiz:

• class: Standard
• transit: 3-8 Days
• service: Standard
• type: Fixed
• cost: $0.00

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