USG Npt Water Pressure Gauge 170027SSLG XR-81 4-1/2IN 0-200PSI

( Brand: Usg ), ( Manufacturer Part Number: 170027 ), ( Part Type: Pressure Gauge ), ( Connection Diameter: 1/2 In ), ( Fitting Size: 0.5 In ), ( Product Condition: New Other ), ( Dial Size: 4.5 In ), ( Reference Sku: 932337 ), ( Model Number: 170027 170027sslg Xr-81 ), ( Thread Type: Npt )

Review USG Pressure Gauge 4-1/2in 0-200psi 1/2in Npt

The **USG 170027 (170027SSLG) XR-81 Pressure Gauge** is a robust, high-performance instrument designed for precision measurement in industrial, commercial, and mechanical applications where reliability and accuracy are paramount. This **4 -inch dial gauge** features a bold, easy-to-read analog display with a **black-and-white contrast** that ensures visibility even in low-light conditions or high-glare environments. The **0-200 psi (pounds per square inch) range** makes it ideal for monitoring moderate to high-pressure systems, including hydraulic lines, pneumatic circuits, HVAC units, and automotive or machinery diagnostics where consistent pressure control is essential. Constructed with a **stainless steel (SS) case**, the **170027SSLG** variant offers superior corrosion resistance compared to standard models, making it well-suited for outdoor use, marine applications, or exposure to moisture, chemicals, or temperature fluctuations. The **1/2-inch NPT (National Pipe Thread) male connection** provides a secure, leak-proof fit to piping systems, while the **XR-81 series** incorporates a **reverse-flow protection mechanism**, preventing backflow that could damage the gauge or contaminate the system. The **high-impact polycarbonate lens** is reinforced for durability, ensuring the gauge withstands vibrations, impacts, and harsh operating conditions without compromising readability. Additionally, the **sealed, oil-filled bourdon tube mechanism** delivers long-term accuracy and resistance to temperature variations, reducing the risk of gauge drift over time. Whether installed in a factory, workshop, or field setting, this pressure gauge combines **industrial-grade construction with user-friendly design**, making it a versatile tool for professionals who demand both performance and longevity in their instrumentation.

### **Pros and Cons of buying a USG 170027 (170027SSLG) XR-81 Pressure Gauge (4-1/2" Dial, 0-200 PSI, 1/2" NPT)**

1. **Durable Construction** The gauge is built with a rugged, metal housing, making it suitable for industrial, automotive, or HVAC applications where resistance to vibration and impact is important.

2. **Large, Easy-to-Read Dial** The 4-1/2-inch dial provides clear visibility of pressure readings, reducing the risk of misreading values in high-stress environments.

3. **Stainless Steel Option (170027SSLG)** The stainless steel version is corrosion-resistant, ideal for outdoor use, humid environments, or applications involving water, steam, or chemicals.

4. **High Accuracy and Reliability** The XR-81 series is known for precision, with minimal drift over time, ensuring consistent measurements.

5. **Standardized Threading (1/2" NPT)** Compatible with most standard fittings, making installation straightforward without the need for adapters.

6. **Wide Pressure Range (0-200 PSI)** Suitable for moderate-pressure systems, including automotive brakes, HVAC compressors, and light industrial applications.

7. **Long Lifespan** High-quality internal components (such as the bourdon tube and sealing mechanisms) contribute to durability, reducing the need for frequent replacements.

8. **Brand Reputation** USG (now part of **Wika** or **Bourdon Instruments**) is a trusted name in pressure measurement, ensuring quality and after-sales support.

1. **Limited Pressure Range** The 0-200 PSI range may be insufficient for high-pressure applications (e.g., heavy machinery, hydraulic systems, or compressed air systems exceeding 200 PSI).

2. **No Digital Display** Unlike electronic gauges, this is an analog model, which means readings require manual interpretation and are subject to human error.

3. **Potential for Glass Breakage** Bourdon tube gauges can have glass dials that may shatter under extreme overpressure or mechanical stress, posing a safety risk.

4. **Maintenance Requirements** Over time, the gauge may require recalibration or replacement of internal parts (e.g., the bourdon tube) if exposed to harsh conditions.

5. **Higher Cost Than Basic Gauges** While reasonably priced for its quality, it may be more expensive than basic plastic or low-end metal gauges with smaller dials.

6. **No Built-in Overpressure Protection** Unlike some industrial gauges, this model does not inherently include a burst disk or pressure relief mechanism, so improper use could damage the gauge.

7. **Limited Customization** The dial face and threading are fixed; users cannot easily modify the gauge for specialized applications without additional parts.

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The **USG 170027 (or 170027SSLG) XR-81 pressure gauge** is a **high-quality, durable analog gauge** well-suited for **moderate-pressure applications** where **accuracy, visibility, and longevity** are priorities. It excels in **automotive, HVAC, and light industrial settings** where corrosion resistance (especially the stainless steel version) and readability matter.

However, it is **not ideal for high-pressure environments** or applications requiring **digital precision, overpressure protection, or frequent extreme conditions**. If the user needs a **lower-cost, simpler gauge**, alternatives with smaller dials or plastic housings may suffice. Conversely, for **higher-pressure or more demanding applications**, a **digital gauge, a gauge with a burst disk, or a specialized industrial model** would be more appropriate.

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- You need a **reliable, large-dial analog gauge** for **0-200 PSI applications** (e.g., brake systems, HVAC, light machinery).

- You require **corrosion resistance** (choose the **170027SSLG stainless steel version** for outdoor or wet environments).

- You prioritize **durability and readability** over digital features.

- Your application requires **pressures above 200 PSI** (consider a higher-range gauge).

- You need **digital readouts, data logging, or remote monitoring** (opt for an electronic gauge).

- Your environment involves **extreme vibrations, frequent overpressure risks, or aggressive chemicals** (a **burst disk-equipped or sealed gauge** may be better).

- You are on a **tight budget** and can tolerate a smaller, less durable gauge.

**Final Verdict:** This is a **solid choice for general-purpose moderate-pressure use**, especially when durability and visibility are key. For specialized needs, evaluate alternatives carefully.

Details:

If you do not see it in the pictures than most likely does come with item. Please see pictures carefully for further visual details as they are part of the. This item is new old stock out of a surplus supply. Please feel free to ask questions before purchase if you are unclear of a certain detail.

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part #: 170027 prices

• $106.00-$138.92

specifications pressureswitchiz:

• brand: Usg
• mpn: 170027
• part type: Pressure Gauge
• connection diameter: 1/2 In
• fitting size: 0.5 In
• product condition: New Other
• dial size: 4.5 In
• reference sku: 932337
• model number: 170027 170027sslg Xr-81
• thread type: Npt

payments pressureswitchiz:

• wallet: Google-pay
• other
• credit card: Visa

returns pressureswitchiz:

• policy: No Returns

general pressureswitchiz:

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

shipping pressureswitchiz:

• transit: 4-9 Days
• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• type: Calculated
• cost: $34.07

offer pressureswitchiz:

• sold: 0
• options: Ship-to-home
• best offers: True
• availability: In Stock
• quantity: 5
• started: May 25, 2026

seller pressureswitchiz:

• # reviews: 5991
• city: Lockport, New York
• rating: 99.8%

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