REOTEMP PT45P1A4P21DTHV Process Glass Npt Water Pressure Gauge 4-1/2 Temp 300 1/4

( Brand: Reotemp ), ( Manufacturer Part Number: PT45P1A4P21DTHV ), ( Part Type: Pressure Gauge ), ( Face Diameter: 4.5 In ), ( Connection Diameter: 1/4 In ), ( Maximum Pressure: 300 Psi )

Review REOTEMP Industrial Pressure Gauge 4-1/2 Inch Process Temp Glass To 300 Psi 1/4 Npt

The **Reotemp PT45P1A4P21DTHV** is a high-performance, industrial-grade pressure gauge engineered for demanding process applications where precision, durability, and reliability are paramount. Designed with a **4-1/2 inch (114.3 mm) front-mounted process glass**, this gauge delivers exceptional visibility and readability, ensuring operators can monitor pressure levels with clarity even from a distance. The **300 psi (20.7 bar) maximum range** makes it ideal for medium-pressure systems, including HVAC, refrigeration, hydraulic, and pneumatic applications where consistent performance is critical. Featuring a **1/4-inch NPT (National Pipe Thread) male connection**, the gauge is equipped with a robust **brass or stainless steel process fitting**, providing a secure and leak-resistant seal for fluid or gas systems. The **AISI 304 stainless steel case** not only enhances corrosion resistance in harsh environments but also contributes to a sleek, professional appearance that aligns with clean-room or sanitary standards. For added protection, the gauge includes a **safety glass shield** that prevents damage from external impacts while maintaining optical clarity. The **bourdon tube mechanism** ensures accurate, repeatable measurements with minimal hysteresis, making it suitable for applications requiring precise control, such as refrigeration compressors, chillers, or industrial process monitoring. Whether installed in a control panel, on a process line, or within a custom instrumentation setup, this gauge combines functionality with robustness, offering a dependable solution for industries where pressure integrity is non-negotiable. Its compact yet sturdy design, paired with Reotemp s reputation for quality engineering, makes it a trusted choice for engineers, technicians, and facility managers seeking a gauge that balances performance with long-term reliability.

### **Pros and Cons of buying a ReoTemp PT45P1A4P21DTHV Pressure Gauge**

1. **High Accuracy and Reliability** The gauge is designed for precision measurements, making it suitable for industrial and process applications where accuracy is critical.

2. **Durable Construction** The **300 psi (20 bar) rating** indicates it can handle moderate to high-pressure applications, reducing the risk of failure under normal operating conditions.

3. **Process Glass Face** The **4.5-inch glass dial** provides better visibility compared to smaller gauges, improving readability in control rooms or field applications.

4. **Threaded Connection (1/4 NPT)** The **male NPT thread** allows for easy installation on pipes, valves, or fittings, ensuring a secure and leak-proof connection.

5. **Temperature Resistance** The **DTHV (Dry-Temp High Vibration) rating** suggests it is built to withstand harsh environments, including high vibration and temperature fluctuations, which is useful in industrial settings.

6. **Compatibility with Process Systems** The gauge is likely designed for **hydraulic, pneumatic, or low-pressure process applications**, making it versatile for various uses.

7. **Brand Reputation** ReoTemp is a well-known manufacturer of industrial pressure gauges, suggesting a level of quality and after-sales support.

1. **Limited Pressure Range** The **300 psi (20 bar) maximum rating** means it is not suitable for high-pressure applications (e.g., steam systems, heavy-duty hydraulics, or extreme industrial processes).

2. **Potential for Glass Breakage** Large glass faces can be more prone to damage from impacts or vibrations, which may be a concern in rugged environments.

3. **No Built-in Protection Against Overpressure** Without a **burst disk or pressure relief mechanism**, there is a risk of catastrophic failure if the system exceeds the gauge s rating.

4. **Potential for Condensation or Corrosion** If exposed to moisture or corrosive media, the gauge may degrade over time unless properly sealed or protected.

5. **Cost Consideration** While not excessively expensive, it may be more costly than basic gauges, depending on the application s necessity for its features.

6. **Maintenance Requirements** Like all mechanical gauges, it may require periodic calibration and maintenance to ensure accuracy, especially in critical applications.

7. **Limited Material Compatibility** The gauge may not be suitable for **aggressive chemicals, high-temperature fluids, or abrasive media** without additional protection (e.g., diaphragm seals).

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### **Conclusion**

The **ReoTemp PT45P1A4P21DTHV** is a **reliable, durable, and accurate** pressure gauge well-suited for **moderate-pressure process applications** where visibility and vibration resistance are important. It excels in **industrial, hydraulic, or pneumatic systems** where a **300 psi (20 bar) rating** is sufficient.

However, it is **not ideal for high-pressure, extreme-temperature, or highly corrosive environments** without additional protection. Users must ensure proper installation, regular maintenance, and compatibility with their system s operating conditions.

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### **Recommendation**

- You need a **large, easy-to-read gauge** for **moderate-pressure (up to 300 psi) process monitoring**.

- Your application involves **vibration or temperature fluctuations** (due to the DTHV rating).

- You require a **durable, brand-name gauge** for **hydraulic, pneumatic, or general industrial use**.

- You can **periodically calibrate and maintain** the gauge to ensure accuracy.

- Your system requires **higher pressure ratings** (e.g., 1000 psi or more).

- The environment involves **extreme temperatures, corrosive media, or high vibration** without proper protection (e.g., diaphragm seals or explosion-proof housing).

- You need **remote monitoring or digital readouts** (a digital gauge may be more suitable).

- Budget constraints make a **lower-cost, basic gauge** sufficient for your needs.

For most **moderate-pressure process applications** where **readability and durability** are priorities, this gauge is a **solid choice**. However, always verify its compatibility with your specific system before purchasing.

Details:

The ReoTemp PT45 Series Industrial Glycerin Filled Process Gauge is a reliable and accurate tool for measuring pressure in variety of industrial applications. PT45 process gauge is designed to withstand corrosive atmospheres and media, pulsation vibration. The 1/4 NPT connection ensures compatibility with a wide range of systems, making it versatile option for businesses and industrial settings. Built by the trusted brand ReoTemp, this pressure gauge is a valuable asset for monitoring and controlling pressure levels in various processes.

With a 4-1/2 Hi-VI's Dial face with maximum pressure of 300 psi, this gauge is designed to provide clear and precise readings. Rugged gauge engineered for process industries. Solid front provides a high degree of user safety.

part #: pt45p1a4p21dthv price

• $55.00

specifications pressureswitchiz:

• brand: Reotemp
• mpn: Pt45p1a4p21dthv
• part type: Pressure Gauge
• face diameter: 4.5 In
• connection diameter: 1/4 In
• maximum pressure: 300 Psi

returns pressureswitchiz:

• policy: No Returns

payments pressureswitchiz:

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

seller pressureswitchiz:

• rating: 100.0%
• city: Darlington, South Carolina
• # reviews: 3

offer pressureswitchiz:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: March 30, 2026
• best offers: True

shipping pressureswitchiz:

• carrier: UPS
• class: Economy
• service: UPS Ground Saver
• type: Calculated
• transit: 9-15 Days
• cost: $8.76

general pressureswitchiz:

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

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