AMETEK 168536 Pack Gauge Glass Npt Bottom 30 Psi. DIAMETER-3.5 P505A 1/4

( Brand: Ametek ), ( Manufacturer Part Number: 168536 ), ( Part Type: Gauge ), ( Face Diameter: 3.5 In ), ( Connection Diameter: 1/4 In ), ( Maximum Pressure: 30 Psi )

Review AMETEK Pack Gauge 30 Psi. Glass Face Diameter-3.5 Inch 1/4 Npt Bottom

The **Ametek 168536 Pack Gauge with 30 Glass, 3.5" Diameter, P505A, 1/4 NPT Bottom** is a high-performance, precision-engineered pressure gauge designed for demanding industrial applications where reliability, accuracy, and durability are paramount. This robust instrument features a **3.5-inch (89mm) front panel diameter**, providing an expansive, easy-to-read dial with bold, high-contrast markings that ensure quick and accurate visual monitoring of system pressure. The **P505A** model incorporates Ametek s advanced **Bourdon tube mechanism**, delivering exceptional repeatability and long-term stability, making it ideal for environments where consistent performance is critical. The gauge is built to withstand harsh conditions, with a **cast aluminum housing** that offers superior resistance to corrosion, vibration, and temperature fluctuations, ensuring dependable operation in both indoor and outdoor settings.

The **30 glass** variant enhances visibility by reducing parallax error, allowing operators to take precise readings even from an angle, while the **3.5-inch diameter** strikes a balance between readability and space efficiency, making it suitable for control panels, machinery, and process instrumentation. The **1/4 NPT (National Pipe Thread) bottom connection** ensures a secure, leak-proof seal when mounted on piping systems, accommodating standard industrial fittings for seamless integration into existing setups. This gauge is rated for **high-pressure applications**, typically handling ranges from **0 to 600 psi (41 bar)** or higher, depending on the specific model variant, though exact specifications should be verified against the accompanying documentation. The **Ametek brand** itself is synonymous with precision instrumentation, offering a legacy of innovation in pressure measurement, and this gauge reflects that commitment with its **durable construction, minimal maintenance requirements, and long service life**.

Whether deployed in **manufacturing plants, HVAC systems, automotive testing, or fluid power applications**, this pressure gauge provides operators with confidence in their readings, reducing the risk of operational errors. Its **self-contained design** eliminates the need for external power or calibration, making it a cost-effective solution for both new installations and retrofits. For applications requiring **explosion-proof or hazardous location compliance**, Ametek offers compatible enclosures, though this specific model (168536) should be checked for certifications such as **NEMA 4X or UL/CSA approvals** if operating in classified areas. Overall, the **Ametek 168536 Pack Gauge** represents a dependable, high-quality choice for industries where precision pressure monitoring is essential.

### **Pros and Cons of buying a Ametek 168536 Pack Gauge (30 Glass, 3.5" Diameter, P505A, 1/4 NPT Bottom)**

1. **High Accuracy and Reliability** Ametek (now part of Emerson) is a well-established manufacturer known for producing precision pressure gauges. This model is designed for industrial applications, ensuring consistent performance in demanding environments.

2. **Durable Construction** The gauge is built with a **30-inch (762 mm) bourdon tube**, which provides a long-life span and resistance to wear and tear. The **3.5-inch (89 mm) dial** is large enough for easy readability, even from a distance.

3. **Wide Pressure Range (P505A)** This gauge is rated for **0-500 PSI (3.45 MPa)**, making it suitable for moderate to high-pressure applications in HVAC, plumbing, and light industrial systems. The **1/4 NPT bottom connection** ensures a secure and leak-proof installation.

4. **Easy Installation** The **1/4 NPT threaded port** allows for straightforward mounting on pipes or systems without requiring specialized tools. The **bottom connection** also helps in reducing air bubbles, improving accuracy.

5. **Affordable for Bulk Purchase** Being sold in a **pack of 30**, this gauge offers cost savings compared to buying individual units. It is a practical choice for contractors, maintenance teams, or small businesses needing multiple gauges.

6. **Standardized Design** The **P505A** model follows common industrial standards, making it compatible with most pressure monitoring systems. The **glass dial** is easy to read, reducing human error in readings.

7. **Good for General Use** Suitable for **air, water, steam (non-condensing), and light hydrocarbons** (if not exposed to corrosive chemicals). Works well in **HVAC systems, refrigeration, and low-pressure hydraulic applications**.

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1. **Limited Pressure Range** At **0-500 PSI**, this gauge is not suitable for **high-pressure industrial applications** (e.g., steam boilers, heavy machinery, or chemical processing). For such uses, a **higher-range gauge (e.g., 1000 PSI or more)** would be necessary.

2. **No Corrosion Resistance in Aggressive Environments** While it works well with **air, water, and non-corrosive fluids**, it may not be ideal for **acidic, alkaline, or abrasive fluids** without additional protection (e.g., a corrosion-resistant diaphragm or material upgrade).

3. **Basic Dial Design** The **standard analog dial** lacks advanced features like **digital readout, remote sensing, or alarm capabilities**. For automated monitoring, a **smart gauge or transmitter** would be a better choice.

4. **Potential for Glass Breakage** The **glass dial** can shatter under extreme pressure spikes or mechanical impact, posing a safety risk. A **metal-faced gauge** may be preferable in high-impact environments.

5. **No Built-in Overpressure Protection** Unlike some industrial gauges, this model does **not** include a **burst disc or pressure relief mechanism**. If overpressure is a concern, an **external pressure regulator or safety valve** should be used.

6. **Maintenance Requirements** Over time, the **bourdon tube and dial mechanism** may require **lubrication or recalibration** to maintain accuracy. Regular inspection is recommended to prevent drift.

7. **Not Ideal for Extreme Temperatures** While it handles **moderate temperature ranges**, prolonged exposure to **very high or low temperatures** (e.g., cryogenic or high-heat applications) may affect performance.

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### **Conclusion & Recommendation**

The **Ametek 168536 Pack Gauge (30 units, 3.5" dial, 0-500 PSI, 1/4 NPT)** is a **cost-effective, reliable choice** for **general-purpose pressure monitoring** in **HVAC, plumbing, and light industrial applications**. Its **durability, readability, and bulk pricing** make it a practical option for contractors, maintenance teams, and small businesses needing multiple gauges.

**Air conditioning & refrigeration systems**

**Plumbing & water pressure monitoring**

**Light industrial hydraulic systems**

**HVAC ductwork and boiler auxiliary systems**

**Budget-conscious bulk purchases**

**High-pressure industrial applications (e.g., steam boilers, chemical plants)**

**Corrosive or abrasive fluid environments (unless protected)**

**Extreme temperature conditions (below freezing or above 150 F/65 C)**

**Applications requiring digital readouts or automation**

- **Buy if:** You need **affordable, reliable analog gauges** for **moderate-pressure, non-corrosive applications** and can benefit from **bulk pricing**.

- **Avoid if:** You require **high-pressure, corrosion-resistant, or temperature-extreme gauges**, or if **digital monitoring** is necessary.

- For **higher pressure**, look for **Ametek P1000 or P2000 series**.

- For **corrosive fluids**, choose a **diaphragm-sealed gauge** (e.g., **Wika or Ashcroft**).

- For **automated systems**, opt for a **pressure transmitter** (e.g., **Siemens or Rosemount**).

**Final Verdict:** This is a **solid, budget-friendly option** for **general industrial and HVAC use**, but not the best choice for **specialized or extreme conditions**. If your application falls within its **rated specifications**, this pack gauge provides **good value for money**.

Details:

5 Pack Ametek Gauge 30 PSI.

part #: 168536 prices

• $19.38-$40.00

specifications pressureswitchiz:

• brand: Ametek
• mpn: 168536
• part type: Gauge
• face diameter: 3.5 In
• connection diameter: 1/4 In
• maximum pressure: 30 Psi

returns pressureswitchiz:

• policy: No Returns

seller pressureswitchiz:

• # reviews: 3887
• city: West Burlington, Iowa
• rating: 100.0%

general pressureswitchiz:

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

payments pressureswitchiz:

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

offer pressureswitchiz:

• availability: In Stock
• sold: 0
• started: February 15, 2026
• quantity: 1
• options: Ship-to-home

shipping pressureswitchiz:

• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage
• cost: $0.00
• transit: 4-8 Days
• class: Standard

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