Dwyer Instruments 1950-0-2F Pressure Switch
The Dwyer Instruments 1950-0-2F Pressure Switch is a high-performance explosion-proof differential pressure switch engineered specifically for technical environments requiring precision monitoring of air and non-combustible gases. Designed for hazardous location service, this SPDT switch offers a versatile pressure range of 0.15 to 0.50 inches w.c., making it the industry standard for monitoring filter status and fan proof-of-flow in critical HVACR systems. The low-pressure differential switch features a robust fluorosilicone diaphragm, ensuring accurate sensing even in fluctuating environmental conditions while maintaining a controlled deadband of 0.10 to 0.15 inches.
For industrial contractors, the Dwyer 1950 Series provides a compact, lightweight solution that is approximately half the bulk of traditional explosion-proof enclosures. The unit is UL, CSA, and FM approved for Class I Div 1 and Class II hazardous atmospheres, featuring a NEMA 3, 7, and 9 enclosure rating that is both raintight and weatherproof. Installation is streamlined via 1/8" female NPT process connections and a convenient external set point adjustment screw that allows for field calibration without disassembling the housing, saving significant time during routine maintenance cycles.
Key Benefits for HVACR Contractors:- Hazardous Location Certification: Fully rated for Class I (Groups C, D), Class II (Groups E, F, G), and Class III environments, providing essential safety for chemical plants and paint booths.
- Streamlined Installation: Compact aluminum housing with 1/8" NPT connections fits easily into tight mechanical spaces compared to legacy explosion-proof switches.
- External Calibration: Adjust the adjustable setpoint via an external screw, eliminating the need to open the enclosure and risk exposure in volatile areas.
- Reliable SPDT Output: The 15A snap switch provides versatile control options for alarm systems, motor starters, and safety interlocks.
- All-Weather Durability: NEMA 3 rating with an O-ring sealed cover and drain plug ensures peak performance in outdoor or high-moisture environments.
What is the proper mounting orientation for the Dwyer 1950-0-2F?
To maintain factory calibration and ensure the diaphragm resets correctly, this switch must be mounted with the diaphragm in a vertical position. Mounting in other orientations can shift the setpoint and affect accuracy.
Can this switch be used with combustible gases?
No. The standard 1950-0-2F is rated only for air and non-combustible, compatible gases. For applications involving combustible media, consult specific model alternatives like the 1950G series.
How do I connect the pressure lines?
Utilize the dual 1/8" female NPT ports. For differential pressure, connect the high pressure to the port marked "High" and the lower pressure to the port marked "Low." For positive pressure applications relative to atmosphere, leave the low port open to a non-hazardous area.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $376.62
-65%$376.62
$131.82Dwyer Instruments 1950-0-2F Pressure Switch
The Dwyer Instruments 1950-0-2F Pressure Switch is a high-performance explosion-proof differential pressure switch engineered specifically for technical environments requiring precision monitoring of air and non-combustible gases. Designed for hazardous location service, this SPDT switch offers a versatile pressure range of 0.15 to 0.50 inches w.c., making it the industry standard for monitoring filter status and fan proof-of-flow in critical HVACR systems. The low-pressure differential switch features a robust fluorosilicone diaphragm, ensuring accurate sensing even in fluctuating environmental conditions while maintaining a controlled deadband of 0.10 to 0.15 inches.
For industrial contractors, the Dwyer 1950 Series provides a compact, lightweight solution that is approximately half the bulk of traditional explosion-proof enclosures. The unit is UL, CSA, and FM approved for Class I Div 1 and Class II hazardous atmospheres, featuring a NEMA 3, 7, and 9 enclosure rating that is both raintight and weatherproof. Installation is streamlined via 1/8" female NPT process connections and a convenient external set point adjustment screw that allows for field calibration without disassembling the housing, saving significant time during routine maintenance cycles.
Key Benefits for HVACR Contractors:- Hazardous Location Certification: Fully rated for Class I (Groups C, D), Class II (Groups E, F, G), and Class III environments, providing essential safety for chemical plants and paint booths.
- Streamlined Installation: Compact aluminum housing with 1/8" NPT connections fits easily into tight mechanical spaces compared to legacy explosion-proof switches.
- External Calibration: Adjust the adjustable setpoint via an external screw, eliminating the need to open the enclosure and risk exposure in volatile areas.
- Reliable SPDT Output: The 15A snap switch provides versatile control options for alarm systems, motor starters, and safety interlocks.
- All-Weather Durability: NEMA 3 rating with an O-ring sealed cover and drain plug ensures peak performance in outdoor or high-moisture environments.
What is the proper mounting orientation for the Dwyer 1950-0-2F?
To maintain factory calibration and ensure the diaphragm resets correctly, this switch must be mounted with the diaphragm in a vertical position. Mounting in other orientations can shift the setpoint and affect accuracy.
Can this switch be used with combustible gases?
No. The standard 1950-0-2F is rated only for air and non-combustible, compatible gases. For applications involving combustible media, consult specific model alternatives like the 1950G series.
How do I connect the pressure lines?
Utilize the dual 1/8" female NPT ports. For differential pressure, connect the high pressure to the port marked "High" and the lower pressure to the port marked "Low." For positive pressure applications relative to atmosphere, leave the low port open to a non-hazardous area.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Dwyer Instruments 1950-0-2F Pressure Switch is a high-performance explosion-proof differential pressure switch engineered specifically for technical environments requiring precision monitoring of air and non-combustible gases. Designed for hazardous location service, this SPDT switch offers a versatile pressure range of 0.15 to 0.50 inches w.c., making it the industry standard for monitoring filter status and fan proof-of-flow in critical HVACR systems. The low-pressure differential switch features a robust fluorosilicone diaphragm, ensuring accurate sensing even in fluctuating environmental conditions while maintaining a controlled deadband of 0.10 to 0.15 inches.
For industrial contractors, the Dwyer 1950 Series provides a compact, lightweight solution that is approximately half the bulk of traditional explosion-proof enclosures. The unit is UL, CSA, and FM approved for Class I Div 1 and Class II hazardous atmospheres, featuring a NEMA 3, 7, and 9 enclosure rating that is both raintight and weatherproof. Installation is streamlined via 1/8" female NPT process connections and a convenient external set point adjustment screw that allows for field calibration without disassembling the housing, saving significant time during routine maintenance cycles.
Key Benefits for HVACR Contractors:- Hazardous Location Certification: Fully rated for Class I (Groups C, D), Class II (Groups E, F, G), and Class III environments, providing essential safety for chemical plants and paint booths.
- Streamlined Installation: Compact aluminum housing with 1/8" NPT connections fits easily into tight mechanical spaces compared to legacy explosion-proof switches.
- External Calibration: Adjust the adjustable setpoint via an external screw, eliminating the need to open the enclosure and risk exposure in volatile areas.
- Reliable SPDT Output: The 15A snap switch provides versatile control options for alarm systems, motor starters, and safety interlocks.
- All-Weather Durability: NEMA 3 rating with an O-ring sealed cover and drain plug ensures peak performance in outdoor or high-moisture environments.
What is the proper mounting orientation for the Dwyer 1950-0-2F?
To maintain factory calibration and ensure the diaphragm resets correctly, this switch must be mounted with the diaphragm in a vertical position. Mounting in other orientations can shift the setpoint and affect accuracy.
Can this switch be used with combustible gases?
No. The standard 1950-0-2F is rated only for air and non-combustible, compatible gases. For applications involving combustible media, consult specific model alternatives like the 1950G series.
How do I connect the pressure lines?
Utilize the dual 1/8" female NPT ports. For differential pressure, connect the high pressure to the port marked "High" and the lower pressure to the port marked "Low." For positive pressure applications relative to atmosphere, leave the low port open to a non-hazardous area.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
