Product Description:SP0402

• Wide Pressure Range:

  • The Emerson SP0402 offers a wide adjustable pressure range that can be tailored to meet the specific requirements of different applications. It typically covers pressure ranges from low (e.g., 0.5 psi) to high pressures (e.g., 600 psi), depending on the model and configuration.

• Adjustable Setpoint:

  • The pressure setpoint, or the specific pressure at which the switch activates or deactivates, is fully adjustable. This feature allows users to customize the pressure threshold to meet the needs of their specific system, whether they are monitoring refrigerant pressure, hydraulic pressure, or other critical parameters.

• Switch Type (SPST/SPDT):

  • The SP0402 is available in SPST (Single Pole, Single Throw) and SPDT (Single Pole, Double Throw) configurations. This means it can either control a single circuit (on/off) or multiple circuits (with separate on/off control for two devices) depending on the needs of the application.

• Durable and Reliable Construction:

  • The switch is built for long-lasting performance in industrial environments. The construction materials are selected for durability, including corrosion-resistant options such as stainless steel or brass for key components. This ensures reliable operation even in harsh environments, including outdoor settings or systems exposed to chemicals or moisture.

• Adjustable Differential:

  • The SP0402 includes an adjustable differential, which defines the pressure range between the activation and deactivation points. This feature helps prevent rapid cycling of the switch in applications where pressure fluctuates within a narrow range.

• Wide Operating Temperature Range:

  • The Emerson SP0402 is designed to operate effectively in a wide range of temperatures, typically from -40°F to 185°F (-40°C to 85°C), making it suitable for a variety of indoor and outdoor applications, as well as in environments with temperature extremes.

• Mechanical Contacts:

  • The pressure switch is equipped with mechanical contacts that open or close when the setpoint pressure is reached. These contacts can be used to activate or deactivate connected equipment, such as compressors, pumps, alarms, or other control systems.

• Electrical Rating:

  • The SP0402 is typically rated for 5 A at 250 VAC or similar electrical specifications, allowing it to handle moderate electrical loads when switching devices such as motors, relays, or other equipment in industrial control circuits.

• Weatherproof and Safe:

  • Many models of the Emerson SP0402 come with an IP54 or IP65 rating, which protects the internal components from dust and water ingress. This makes the switch suitable for use in harsh outdoor environments or where it may be exposed to moisture or contaminants.

• Mounting Options:

  • The Emerson SP0402 is designed for easy installation and can typically be mounted on a pipe, panel, or other equipment. It often features 1/4" NPT or 1/8" NPT threaded connections, making it compatible with standard mounting systems for seamless integration.

Features:SP0402

• The SP0402 features an adjustable pressure range that can accommodate a wide range of pressures, typically from low-pressure (e.g., 0.5 psi) to high-pressure (e.g., 600 psi or more) systems.
• This makes the SP0402 suitable for various applications, from HVAC and refrigeration systems to hydraulic and pneumatic circuits.
• The pressure setpoint (the pressure at which the switch activates or deactivates) is fully adjustable. This allows users to customize the activation and deactivation pressure based on their system requirements.
• Setpoints can be fine-tuned to ensure that the system operates within safe and efficient pressure limits.
• The differential (the pressure range between the activation and deactivation points) is adjustable. This feature prevents the switch from cycling too frequently, providing stability in systems where pressure fluctuates within a narrow range.
• Users can set the differential to suit the specific tolerance needed for their application, helping to avoid unnecessary switch cycling.
• The SP0402 uses mechanical contacts (relay contacts) to switch on/off when the system pressure reaches the preset threshold.
• These contacts can control connected equipment, such as alarms, pumps, compressors, or other devices, making the SP0402 ideal for automation and system protection.
• The SP0402 is available in two common switch configurations:
  • SPST (Single Pole, Single Throw): A simpler on/off switch for applications requiring a single circuit.
  • SPDT (Single Pole, Double Throw): Allows control of multiple circuits, which is useful for more complex systems that require multiple actions based on different pressure thresholds.
• The Emerson SP0402 operates in a wide temperature range typically from -40°F to 185°F (-40°C to 85°C), making it suitable for various environments, including harsh outdoor and industrial settings.
• This ensures reliable operation in systems exposed to temperature fluctuations or extreme conditions.
• The SP0402 is built with high-quality materials such as stainless steel or brass, which offer excellent durability and resistance to corrosion.
• The construction ensures that the switch can withstand harsh conditions, including exposure to moisture, chemicals, and other potentially corrosive environments.
• The switch is often rated with an IP54 or IP65 enclosure, making it resistant to dust and water ingress. This ensures that the device can function reliably in outdoor, wet, or dusty environments, without the risk of failure due to exposure to environmental factors.
• The Emerson SP0402 offers flexible mounting options with commonly available threaded connections, such as 1/4" NPT or 1/8" NPT. This makes installation easy and compatible with standard pipe fittings or panels.
• Some models may also offer additional mounting brackets for securing the switch to machinery or equipment.
• The SP0402 pressure switch typically has an electrical rating of 5A at 250 VAC or similar, making it capable of controlling a variety of devices such as compressors, motors, and alarms.
• The switch is designed to handle moderate electrical loads, ensuring reliable activation and deactivation of connected equipment.
• Overpressure Protection: The SP0402 is designed to protect equipment from overpressure conditions by triggering shutdowns or activating alarms when the pressure exceeds the setpoint.
• Fail-Safe Operation: In the event of a system failure, the switch can be configured to either activate or deactivate a control mechanism, preventing damage to the system.
• By ensuring pressure stays within safe and optimal levels, the SP0402 helps improve energy efficiency in systems by preventing unnecessary operation of pumps, compressors, or other equipment.
• This results in lower operational costs and improved overall system performance.

Technical Parameters:SP0402

Applications:SP0402

• Refrigerant Pressure Control:
  The SP0402 is commonly used to monitor and regulate the refrigerant pressure in air conditioning and refrigeration systems. It helps ensure that compressors and other critical components operate within safe pressure limits, preventing damage to the system.
• Fan and Pump Control:
  The switch is also used for controlling the operation of fans and pumps in HVAC systems. It can turn the system on or off based on the pressure in the system, improving energy efficiency and preventing overloading of equipment.
• Compressor Protection:
  In refrigeration applications, the SP0402 is used to protect compressors by monitoring the system's pressure. It ensures that the pressure does not exceed safe operating limits, which can cause compressor failure or damage.
• Temperature Regulation:
  By monitoring refrigerant pressure, the switch helps maintain the optimal temperature in refrigerated spaces, ensuring efficient cooling and energy use.
• Leak Detection and System Shutdown:
  The SP0402 can be used to detect pressure drops caused by refrigerant leaks, triggering a system shutdown or alarm to prevent further damage to the refrigeration unit.
• Air Pressure Control:
  In pneumatic applications, the SP0402 monitors the air pressure in compressors, actuators, and pneumatic tools. The switch helps maintain optimal air pressure levels and prevents over-pressurization that could damage pneumatic equipment.
• Automation of Pneumatic Valves:
  The pressure switch can be used to control the opening and closing of pneumatic valves based on the system's pressure, ensuring smooth and efficient operation of pneumatic systems.
• Hydraulic Pressure Monitoring:
  In hydraulic machinery, the SP0402 is used to monitor the pressure in hydraulic circuits. It helps prevent overpressure conditions that could lead to system failure or damage to hydraulic pumps, cylinders, or other components.
• Pump Control:
  The switch can be used to control the operation of hydraulic pumps, ensuring that they only operate when the pressure is within the specified range, improving energy efficiency and preventing system overload.
• Pressure Protection for Equipment:
  The SP0402 is used in various industrial machinery applications to protect equipment from dangerous pressure levels. By activating alarms or shutting down systems when pressure exceeds safe limits, the switch helps prevent costly damage to critical machinery.
• Machine Tool Pressure Control:
  In manufacturing processes where precise fluid or gas pressures are required, the SP0402 can ensure that pressure levels remain within tolerance, optimizing the performance of machine tools and reducing downtime.
• Water Treatment and Distribution:
  The SP0402 is used in water treatment plants to monitor and regulate the pressure in filtration systems, pumps, and pipelines. It helps ensure that water flows efficiently and that pressure conditions are within operational limits, preventing damage to pumps and other equipment.
• Oil and Chemical Handling:
  The switch is used to regulate pressure in oil and chemical transfer systems, preventing overpressure that could lead to system failures or leaks. It is ideal for monitoring the pressure in fluid systems where precise control is necessary for safe operation.
• Pump Activation and Deactivation:
  The SP0402 can control the activation and deactivation of pumps in various systems, including water supply, fluid distribution, and firefighting applications. The switch ensures that the pump only operates when the pressure is within the desired range, saving energy and preventing excessive wear on the pump.
• Tank Pressure Regulation:
  In systems with pressure vessels or tanks, the SP0402 can be used to monitor the pressure inside the tank, ensuring that it does not exceed the maximum safe pressure. If the pressure becomes too high or too low, the switch can activate alarms or shut off the system to protect the tank and its contents.
• Pipeline Pressure Monitoring:
  In the oil and gas industry, the SP0402 is used to monitor pressure in pipelines and storage tanks. By regulating the pressure in pipelines, the switch helps prevent leaks, ruptures, or other dangerous situations caused by overpressure or underpressure conditions.
• Drilling and Extraction Systems:
  The switch is also used in drilling and extraction equipment to ensure that the pressure in hydraulic lines, wellheads, and other critical systems remains within safe operating limits.
• Fire Pump Systems:
  The SP0402 is used in fire protection systems to monitor the pressure in fire pump systems. The switch ensures that the pump operates only when needed and prevents excessive pressure buildup, which could damage the system or reduce its effectiveness during a fire emergency.
• Pressure-activated Control Circuits:
  The SP0402 is often used in automated systems where pressure levels need to control the operation of various devices, such as valves, motors, or alarms. It can act as a trigger in control circuits to automate responses based on pressure changes, improving system efficiency and safety.
• Irrigation Systems:
  The SP0402 can be used in irrigation systems to monitor and control the water pressure. Ensuring that the pressure remains at the optimal level prevents damage to irrigation lines and ensures efficient water distribution across agricultural fields.
• Pressure Control in Sprayers:
  In agricultural sprayers, the SP0402 helps maintain the correct spray pressure, ensuring that the sprayer operates efficiently and applies chemicals uniformly.
• Marine Engine Pressure Monitoring:
  The SP0402 is also used in marine systems to monitor engine or fuel pressure, ensuring that the system operates safely and effectively during various conditions. This is particularly important in preventing fuel line blockages or overpressurization, which could lead to engine failure.

Customization:SP0402

• The pressure range of the SP0402 can be customized based on the application. Depending on the model, the switch can be set to monitor pressures ranging from as low as 0.5 psi up to 600 psi or more.
• Custom Pressure Ranges: Emerson offers the flexibility to configure the switch for non-standard pressure ranges, making it suitable for specific low- or high-pressure applications, such as specialized industrial processes or custom systems.
• Adjustable Setpoints: The SP0402 allows users to set the activation (setpoint) and deactivation points within the pressure range, enabling precise control over when the switch operates.
• Adjustable Differential: The differential (the difference between the pressure at which the switch activates and deactivates) can also be adjusted. This feature helps prevent rapid cycling in applications where pressure fluctuates within a narrow range.
• Users can specify custom setpoint and differential values to suit the specific application’s requirements for stability and accuracy.on
• Switch Type: The SP0402 is available in SPST (Single Pole, Single Throw) and SPDT (Single Pole, Double Throw) configurations, depending on whether a simple on/off or more complex control (e.g., multiple circuits) is needed.
• Custom Electrical Ratings: While the standard model typically supports 5A at 250 VAC, Emerson may offer options to accommodate different electrical ratings, such as:
  • Higher current ratings
  • Low-voltage configurations for use in control circuits
• Contact Type and Terminals: Users can specify different terminal types (e.g., screw terminals, quick-connect terminals) or contact materials based on their electrical and environmental requirements.
• Custom Materials: Depending on the environmental conditions, customers can request specific materials for the housing, diaphragm, and contact materials. For example:
  • Stainless Steel or Brass housings for corrosion resistance in harsh environments
  • Plastic components for more lightweight or cost-effective applications
• Chemical Resistance: For use in chemical processing or other specialized environments, Emerson may offer switches with chemical-resistant materials to ensure long-term durability.
• Custom IP Ratings: The SP0402 typically comes with IP54 or IP65 ratings, which provide protection against dust and water ingress. However, depending on the application, Emerson may be able to provide switches with higher IP ratings (e.g., IP67 or IP68) for more demanding environments, such as outdoor or submerged applications.
• For applications in extreme environments, Emerson can offer weatherproof and water-resistant enclosures.
• Custom Operating Temperature: The standard operating temperature range for the SP0402 is typically between -40°F to 185°F (-40°C to 85°C). However, Emerson may offer options for applications that require a broader or narrower temperature range, such as extreme cold or high heat environments.
• This is particularly important in industries such as oil and gas, chemical processing, or outdoor equipment where temperature fluctuations may be severe.
• Custom Mounting Configurations: The SP0402 can be mounted using standard 1/4" NPT or 1/8" NPT threaded connections. However, Emerson can customize the switch with different mounting options to suit specific equipment or systems, such as:
  • Custom threaded sizes for specific pipe or connection types
  • Brackets or flanges for securing the switch to panels or machines
  • Vibration-resistant mounting for systems with high mechanical vibrations
• Custom Pressure Port Sizes: In addition to the standard 1/4" NPT or 1/8" NPT threaded connections, Emerson may provide customized pressure port sizes to suit specific equipment or piping requirements.
• Multiple Pressure Ports: For applications requiring monitoring in multiple locations, Emerson may offer custom designs with multiple pressure sensing ports.
• Electrical Connections: The SP0402 typically uses screw terminals or quick-connect terminals for electrical wiring. Emerson may offer custom connectors or wiring interfaces to meet specific electrical system needs.
• Signal Output: In some cases, the switch can be customized to provide analog or digital output (e.g., 4-20mA or a simple ON/OFF signal) for integration with automation systems or remote monitoring.
• Hazardous Area Compliance: For use in industries like oil and gas, mining, or chemical plants, Emerson may offer versions of the SP0402 that are explosion-proof or compliant with ATEX or IECEx standards for use in hazardous locations where flammable gases or dust are present.
• Custom Certifications: Depending on the location and industry, Emerson can provide switches that meet local regulatory standards or safety certifications (e.g., UL, CE, RoHS, Ex d, Ex ia).
• Custom Alarm Settings: Emerson can customize the switch with additional alarm functions, such as setting a pressure threshold at which an alarm is triggered, or integrating it with control panels to alert operators to abnormal conditions.
• Fail-Safe Options: The switch can be configured with fail-safe mechanisms, such as automatic shutdown or default activation if the system fails or pressure readings go beyond safe levels.
• Factory Calibration: Emerson may offer factory calibration services to ensure that each SP0402 is calibrated to the exact pressure settings required for the application. This ensures high accuracy and consistency in performance.
• Testing for Specific Conditions: For critical applications, Emerson can perform rigorous environmental testing (e.g., temperature, vibration, humidity) to ensure that the switch will perform reliably under the expected conditions.

Support and Services:SP0402

Our Industrial Servo Drives are designed to provide precise and reliable control of motor speed and position in a variety of industrial applications. We offer a range of technical support and services to ensure our customers get the most out of their servo drives:

- Technical documentation and manuals for installation, configuration and troubleshooting

- Online and phone support from our experienced technical team

- Repair and maintenance services to keep your servo drives running smoothly

- Customization services to meet specific application requirements

- Training courses on servo drive operation and maintenance

Our goal is to ensure our customers are satisfied with their servo drive performance and have access to the resources they need to maintain and optimize their equipment.