
OPLC-A-300 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $75.00 | Condition is Used, OPLC-A-300 FW MURPHY SWITCHGAGE, FREE SHIPPING | 100.0% |
![]() | $79.99 | Condition is Used, MURPHY PRESSURE SWICH GAGE ENCLOSURE OPLC-A-300-EX, FREE SHIPPING | 100.0% |
![]() | $275.00 | Condition is Used, MURPHY Explosion-Proof Pressure Gauge OPLC-A-300-EX 125V-AC 1Amp 300PSi /2.07MPA, shipping cost = $60.00 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $249.95 | Condition is New, MURPHY SWICHGAGE EXPLOSION-PROOF PRESSURE Gauge/Limit Switch OPLC-A-300-EX 125V, shipping cost = $19.99 | 99.9% |

The Murphy ENVision OPLC-A-300 4.5 Pressure Switch from Murphy Products is a versatile and reliable solution for monitoring and controlling fluid pressure in various industrial applications. This pressure switch features a 4.5 psi set point and is well-suited for applications requiring accurate and consistent pressure monitoring.
The OPLC-A-300 is designed with a rugged and durable construction, making it ideal for use in harsh operating environments. Its compact and sleek design allows for easy installation and integration into existing systems. The switch has a corrosion-resistant, polycarbonate housing, ensuring long-lasting performance even in the presence of moisture or chemicals.
This pressure switch is equipped with a 0.5-inch NPT threaded connection, which allows for quick and secure installation. It also comes with both normally open (NO) and normally closed (NC) contacts, providing flexibility for different wiring configurations. The contacts are rated for a maximum voltage of 277/480V AC and a current of 10 amps, making it suitable for a wide range of electrical systems.
The OPLC-A-300 is designed to operate reliably under various temperature conditions, with a temperature range of -40 F to 185 F (-40 C to 85 C). It also features a built-in safety relief valve, which provides an additional layer of protection against overpressure situations.
Installation of the Murphy ENVision OPLC-A-300 4.5 Pressure Switch is straightforward and can be completed using basic tools. The switch comes with clear and concise instructions, as well as a mounting template to ensure proper positioning. Additionally, the switch is UL and CSA certified, ensuring compliance with industry safety standards.
In summary, the Murphy ENVision OPLC-A-300 4.5 Pressure Switch is a robust and reliable solution for monitoring and controlling fluid pressure in industrial applications. Its durable construction, versatile wiring options, and wide temperature range make it a flexible and versatile tool for a variety of industrial applications.
Pros and Cons of Buying Murphy ENVision OPLC-A-300 4.5 Pressure Switch (Part No. 05700688)
1. Overview:The Murphy ENVision OPLC-A-300 4.5 pressure switch (Part No. 05700688) is a versatile and advanced pressure switch designed for various industrial applications. It comes with several benefits and drawbacks.
2. Pros:a. Accuracy and Precision: The OPLC-A-300 pressure switch offers high precision and accuracy, ensuring reliable pressure sensing and control in various industrial processes.
b. Versatility: This pressure switch can be used in a wide range of applications, including process control, liquid level measurement, and pressure protection.
c. Safety: The Murphy ENVision OPLC-A-300 switch includes safety features such as a fail-safe output, which can help prevent potential hazards in industrial processes.
d. Easy Installation: The pressure switch is designed for easy installation and integration into existing systems, reducing downtime and installation costs.
e. Durability: The Murphy ENVision OPLC-A-300 is built to withstand harsh industrial environments, ensuring long-term reliability and performance.
3. Cons:a. Cost: The Murphy ENVision OPLC-A-300 pressure switch may have a higher upfront cost compared to some other pressure switches in the market.
b. Complexity: Due to its advanced features and capabilities, the OPLC-A-300 pressure switch may require more specialized knowledge and expertise for setup and maintenance.
4. Conclusion:The Murphy ENVision OPLC-A-300 4.5 pressure switch (Part No. 05700688) offers numerous advantages, including high accuracy, versatility, safety, easy installation, and durability. However, it may have a higher upfront cost and require more specialized knowledge for setup and maintenance. Ultimately, the decision to purchase this pressure switch depends on the specific requirements and budget of your industrial application.
5. Recommendation:If your industrial application demands high precision, versatility, safety, and long-term reliability in pressure sensing and control, the Murphy ENVision OPLC-A-300 4.5 pressure switch (Part No. 05700688) is a solid investment. With its advanced features and robust design, it can help optimize your processes, improve safety, and reduce downtime. However, if the upfront cost and complexity are concerns, you may want to consider alternative pressure switches that better fit your budget and expertise.
Details:
The limit switch is accessible from the front of gage and contacts have a self-cleaning motion to enhance electrical continuity. Suitable for engines or electric motors with appropriate Murphy magnetic switch transformer relay assemblies. The limit switch can be wired directly to electric pilot circuits operate alarms and/or shutdown engines and motors. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch.
The OPLC-A-300 is a surface mounting 4.5 114mm pressure swichgage, with range of 0-300 psi 0-2.07 map 0-20 bar. An psst toggle switch is provided to override the low limit contact for equipment start-up. This model does not latch. Inside the oplc-a-3 pointer closure against either of adjustable contacts completes pilot-duty circuit.
specifications indusswitch:
- brand: Murphy By Enovation Controls
- mpn: Oplc-a-300
- part type: Pressure Control
- material: Aluminum, Phosphor Bronze, Polycarbonate, Brass
general indusswitch:
- category: Business & Industrial > Electrical Equipment Supplies > Pressure Switches
offer indusswitch:
- started: july 14, 2025
- availability: in stock
- prices: $75.00–$275.00
- item condition:
- Used
- New
- sold #: 19
- in stock #: 4
- options: ship-to-home
payments indusswitch:
- wallet: apple-pay
- other
- credit card: visa
shipping indusswitch:
- service: standard
- class: standard
- transit: 4-8 days
- type: fixed
returns indusswitch:
- policy: returns accepted
- paid by: seller
- time: 30 days
- method: money back
seller indusswitch:
- rating: 99.3%
- city: brentwood, new york
- # reviews: 1329
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