STEWARTS USA 30S-100 Dial Water Pressure Gauge 100PSI 1/4

( Brand: Stewarts Usa ), ( Manufacturer Part Number: 30S-100 ), ( Part Type: Pressure Gauge ), ( Face Diameter: 2 In ), ( Connection Diameter: 1/4 In ), ( Mounting Position: Side/bottom Mount ), ( Maximum Pressure: 100 Psi )

Review STEWARTS USA New Pressure Gauge Inch Dial 100psi 1/4 Lm

The **Stewarts 30S-100 Pressure Gauge** is a robust, high-quality instrument designed for precision monitoring of hydraulic, pneumatic, and industrial systems where reliable pressure measurement is critical. This durable gauge features a **100 PSI (pounds per square inch) range**, making it ideal for applications requiring moderate pressure control, such as automotive brake systems, air compressors, HVAC units, and light-duty hydraulic equipment. The **1/4-inch NPT (National Pipe Thread) connection** ensures a secure and leak-proof fit, allowing for easy installation on pipes, fittings, or equipment where compact yet dependable pressure readings are essential.

Constructed with a **cast aluminum housing**, the gauge is built to withstand harsh environments, offering resistance to corrosion and mechanical stress while maintaining accuracy over extended use. The **dial face** is clearly marked with bold, easy-to-read numbers and graduations, providing instant visual feedback on pressure levels. The **30S series** is known for its **high-impact durability**, featuring a reinforced case and a robust mounting bracket for stable installation. Whether mounted on a panel, wall, or directly to equipment, this gauge delivers consistent performance with minimal maintenance, making it a trusted choice for professionals in mechanical, automotive, and industrial settings.

The **100 PSI range** strikes a balance between precision and practicality, ensuring that users can monitor pressure levels without the risk of overloading the gauge, while still covering a wide variety of common applications. The **1/4-inch NPT thread** is a standard size, simplifying compatibility with existing systems and reducing the need for adapters. Additionally, the gauge s **sealed internal mechanism** protects against dust, moisture, and temperature fluctuations, ensuring long-term reliability. Whether used in a workshop, garage, or industrial facility, the **Stewarts 30S-100 Pressure Gauge** delivers dependable performance, making it an indispensable tool for anyone requiring accurate and durable pressure measurement.

**Pros and Cons of buying a Stewart 30S-100 Pressure Gauge (Dial: 100 PSI, 1/4" Connection)**

1. **Reliability and Durability** Stewart Instruments is a well-established brand known for producing high-quality pressure gauges. The 30S series is designed for industrial and commercial applications, suggesting robust construction and longevity, especially if properly maintained.

2. **Accurate Readings** The gauge is calibrated to provide precise pressure measurements up to 100 PSI, which is essential for applications requiring consistent monitoring (e.g., HVAC, automotive, or pneumatic systems).

3. **Compatibility** The 1/4" NPT (National Pipe Thread) connection is standard in many industries, making it easy to integrate into existing systems without additional adapters.

- HVAC systems (air conditioning, refrigeration)

- Automotive systems (brake lines, fuel systems)

- Pneumatic tools and machinery

- Hydronic heating systems

- Small-scale industrial processes

5. **Affordable Price** Compared to some specialized or high-end gauges, this model offers good value for its performance and durability, making it accessible for budget-conscious buyers.

6. **Easy Installation** The simple design and standard threading make it straightforward to install and replace, reducing downtime in maintenance or troubleshooting.

7. **Visual Clarity** The dial is likely large enough for easy reading, which is important in operational settings where quick checks are necessary.

---

1. **Limited Pressure Range** The gauge is only rated for 100 PSI, which may be insufficient for high-pressure applications (e.g., heavy-duty hydraulic systems, high-pressure boilers, or certain industrial processes). Overloading it could damage the gauge or lead to inaccurate readings.

- Backlit or high-visibility dials for low-light conditions.

- Remote mounting capabilities (e.g., for long stem gauges).

- Built-in temperature compensation for accuracy in varying environments.

- Digital or smart features (e.g., data logging or wireless connectivity).

3. **Maintenance Requirements** Pressure gauges can degrade over time due to wear, corrosion, or fluid contamination. This gauge may require periodic recalibration or replacement of the internal bourdon tube, which could add long-term costs.

4. **Potential for Inaccuracy Over Time** Even high-quality gauges can drift slightly over years of use. Without regular calibration, readings may become unreliable, leading to inefficiencies or safety risks.

5. **Limited Brand Support** While Stewart is reputable, customer support or warranty options may not be as extensive as those offered by larger, globally recognized brands (e.g., Ashcroft, Wheeler, or Omega).

6. **Environmental Sensitivity** Exposure to extreme temperatures, moisture, or corrosive substances (e.g., in some industrial settings) could shorten the gauge s lifespan or affect accuracy.

7. **No Overpressure Protection** Unlike some gauges with built-in safety features (e.g., burst disks or pressure switches), this model does not inherently protect against sudden spikes beyond its 100 PSI limit, which could cause failure if overpressurized.

---

The Stewart 30S-100 pressure gauge is a **practical and cost-effective choice** for applications requiring accurate, low-to-moderate pressure monitoring (up to 100 PSI). Its reliability, standard sizing, and compatibility with common systems make it a solid option for general use in HVAC, automotive, or light industrial settings. However, it is not ideal for high-pressure environments or applications demanding advanced features like remote sensing or digital integration.

For users who prioritize **durability, simplicity, and affordability** within its specified range, this gauge is a reasonable investment. Those needing **higher pressure ratings, environmental protection, or smart functionality** may need to consider more specialized or premium models.

---

- You need a **budget-friendly, accurate gauge** for pressures up to 100 PSI.

- Your application is **low-risk** (e.g., residential HVAC, basic automotive work, or pneumatic tools).

- You plan to **calibrate it periodically** to maintain accuracy.

- You prefer a **reliable, no-frills solution** from a trusted brand.

- Your system operates at **pressures significantly above 100 PSI** (risk of damage or inaccuracy).

- You require **high-visibility, remote, or digital features**.

- Your environment involves **extreme conditions** (e.g., high heat, corrosive fluids, or frequent pressure spikes).

- You need **extended warranties or advanced technical support**.

- For **higher pressure needs**, look for gauges rated to 200 PSI or more (e.g., Stewart 30S-200 or similar).

- For **industrial or harsh environments**, consider gauges with **stainless steel construction, temperature compensation, or explosion-proof ratings**.

- For **smart monitoring**, explore digital gauges or those compatible with IoT systems.

Details:

New Stewarts USA 30S-100 Pressure Gauge 2 Dial 100psi 1/4 LM.

part #: 30s100 prices

• $25.02-$29.95

specifications pressureswitchiz:

• brand: Stewarts Usa
• mpn: 30s-100
• part type: Pressure Gauge
• face diameter: 2 In
• connection diameter: 1/4 In
• mounting position: Side/bottom Mount
• maximum pressure: 100 Psi

general pressureswitchiz:

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

offer pressureswitchiz:

• sold: 0
• quantity: 4
• availability: In Stock
• best offers: True
• started: May 27, 2026
• options: Ship-to-home

shipping pressureswitchiz:

• service: UPS Ground, UPS Next Day Air, UPS 2nd Day Air
• cost: $0.00
• transit: 3-7 Days
• type: Calculated
• carrier: UPS
• class: Standard, One-day, Expedited

payments pressureswitchiz:

• wallet: Apple-pay
• other
• credit card: Mastercard

seller pressureswitchiz:

• rating: 100.0%
• city: Portland, Oregon
• # reviews: 14407

returns pressureswitchiz:

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

Stewarts Usa 30S-100 Is Similar To:

• 40s-3k-fp-mpro Stewarts-usa Gauge New In (38.1% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(August 24th, 2017)
• 41s-20k-fp-1-4 Hpf Stewarts Usa Gauge (35.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(September 6th, 2017)
• 41s-20kfp-4pf-mpro Stewarts Guage 20000psi New (37.8% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(November 12th, 2017)
• 44s-30wc Stewarts Heavy Duty Ss Gauge Range Wc Npt New (38.7% similar) Item is sold as pictured. The Stewarts 44S-30WC is in new condition...(February 23rd, 2022)
• Stewarts 20b-100wc-cb Pressure Gauge 0-100in-wc 2-1 2in 1 4in Npt (61.5% similar) Thread type:not. Gage valves. Pressure regulator valves. Solenoid valves. Solenoid coils. Shock absorbs. Safety and security. The Stewarts 20B-100WC-CB is in new condition...(July 3rd, 2022)
• Stewarts 40s-6k-fp-s-bdwm Pressure Gauge 4in 0-6000psi 1 4in Npt (63.6% similar) Solenoid valves. Pressure regulator valves. Thread type:not. Safety and security. Solenoid coils. Shock absorbs...(October 7th, 2024)
• Stewarts 49s-6k-fp-k Pressure Gauge 5in 0-6000psi 1 4in Npt (62.9% similar) Pressure regulator valves. Solenoid coils. Thread type:not. Shock absorbs. Solenoid valves. Safety and security...(October 7th, 2024)
• Stewarts S-3702 Tube And Socket Pressure Gauge 5000 Psi With 3 Hip Valves Stand (48.6% similar) Stewarts tube socket pressure gauge, model S-3702, 5000 psi. Chap consultants Dba surplus, est. Valves: hip 60-12HF4, 60-23HF4, 60-61HF4. For internal use: bar codes: 19091409, location: RC 8,: Stewarts tube socket pressure gauge...(February 25th, 2025)
• Stewarts Usa S-13851 2 5000 Psi Pressure Gauge 316 Stainless Steel (55.6% similar) The product is a high-pressure - 5000 psi pressure gauge made by Stewarts Usa. It features a 3.5-INCH face diameter and 1/4-INCH connection diameter, designed for bottom mounting. This gauge is made of durable 316 stainless steel and manufactured in the Usa, ensuring quality accuracy measuring air ...(March 23rd, 2025)
• Stewarts-usa 41sv-200 Stewarts-usa Vibragauge Pressure Gauge 4 Inch 0-200psi 1 2 Npt 316ss No Bo (59.6% similar) Stewarts-usa 41SV-200 breakage pressure gauge 4/0 200PSI 1/2 not 316SS no box: gauge, 0-200 psi, bottom connection, dial, 316 ss, new-no box-item may show signs of wear from storage see pictures. You might also like. Gulf asset recovery. To coordinate pickup. Eaton carouse-hinds EDSC272-SA 2-GANG ...(March 26th, 2025)
• Stewarts Usa 1582122098 Heavy Duty Pressure Gauge 0-30000 Psi 1 2 Inch (57.8% similar) In good condition. Has some scuffs/scratches. See pictures...(April 17th, 2025)