Dwyer Instruments 1900-1MR Pressure Switch
The Dwyer Instruments 1900-1MR is a professional-grade differential pressure switch designed for critical monitoring of air and non-combustible gases. This compact low pressure switch features a manual reset mechanism, ensuring the system remains locked in an alarm state until a technician can verify the cause of the pressure deviation, making it an essential component for HVAC safety limit applications. With an adjustable range of 0.4" w.c. to 1.6" w.c., it offers high repeatability of ±3%, providing reliable performance for clogged filter detection and duct static pressure monitoring.
Built for the rigors of the field, the unit utilizes a silicone diaphragm and a robust SPDT switch rated for 15A at 120-480 VAC. The internal set point adjustment screw is protected within the conduit enclosure to prevent unauthorized tampering after calibration. Its 1/8" female NPT process connections allow for easy integration into existing pneumatic lines, while the vertical diaphragm mounting ensures maximum accuracy for low-range measurements in refrigeration, oven, and dryer systems.
Key Benefits:
- Mechanical Manual Reset: Provides a safety lockout that requires physical intervention, preventing automatic equipment restarts during fault conditions.
- High Current Capacity: The 15A SPDT electrical rating allows for direct control of fans, dampeners, and alarm circuits without always needing auxiliary relays.
- Tamper-Resistant Design: Set point adjustment is located inside the housing, ensuring that calibrated differential pressure settings remain secure.
- Wide Media Compatibility: Ideal for monitoring air or non-combustible gases in cleanrooms, laboratories, and standard air handling units.
- Industry Approvals: Meets UL, CSA, CE, and FM standards for industrial and commercial HVACR installations.
Common Questions:
How do I adjust the set point on the 1900-1MR?
Remove the conduit cover to access the internal adjustment screw; turning the screw changes the spring tension against the diaphragm to reach your desired trip point within the 0.4-1.6" w.c. range.
Can this switch be used in a vacuum application?
The 1900-1MR is optimized for positive pressure applications. For vacuum-only monitoring, the source should be connected to the low-pressure port while leaving the high-pressure port open to the atmosphere.
What is the maximum pressure limit for the silicone diaphragm?
The unit can withstand a continuous pressure of 45" w.c. and a surge pressure up to 10 psig without damaging the internal sensing elements.
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: $135.98
-65%$135.98
$47.59Dwyer Instruments 1900-1MR Pressure Switch
The Dwyer Instruments 1900-1MR is a professional-grade differential pressure switch designed for critical monitoring of air and non-combustible gases. This compact low pressure switch features a manual reset mechanism, ensuring the system remains locked in an alarm state until a technician can verify the cause of the pressure deviation, making it an essential component for HVAC safety limit applications. With an adjustable range of 0.4" w.c. to 1.6" w.c., it offers high repeatability of ±3%, providing reliable performance for clogged filter detection and duct static pressure monitoring.
Built for the rigors of the field, the unit utilizes a silicone diaphragm and a robust SPDT switch rated for 15A at 120-480 VAC. The internal set point adjustment screw is protected within the conduit enclosure to prevent unauthorized tampering after calibration. Its 1/8" female NPT process connections allow for easy integration into existing pneumatic lines, while the vertical diaphragm mounting ensures maximum accuracy for low-range measurements in refrigeration, oven, and dryer systems.
Key Benefits:
- Mechanical Manual Reset: Provides a safety lockout that requires physical intervention, preventing automatic equipment restarts during fault conditions.
- High Current Capacity: The 15A SPDT electrical rating allows for direct control of fans, dampeners, and alarm circuits without always needing auxiliary relays.
- Tamper-Resistant Design: Set point adjustment is located inside the housing, ensuring that calibrated differential pressure settings remain secure.
- Wide Media Compatibility: Ideal for monitoring air or non-combustible gases in cleanrooms, laboratories, and standard air handling units.
- Industry Approvals: Meets UL, CSA, CE, and FM standards for industrial and commercial HVACR installations.
Common Questions:
How do I adjust the set point on the 1900-1MR?
Remove the conduit cover to access the internal adjustment screw; turning the screw changes the spring tension against the diaphragm to reach your desired trip point within the 0.4-1.6" w.c. range.
Can this switch be used in a vacuum application?
The 1900-1MR is optimized for positive pressure applications. For vacuum-only monitoring, the source should be connected to the low-pressure port while leaving the high-pressure port open to the atmosphere.
What is the maximum pressure limit for the silicone diaphragm?
The unit can withstand a continuous pressure of 45" w.c. and a surge pressure up to 10 psig without damaging the internal sensing elements.
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 1900-1MR is a professional-grade differential pressure switch designed for critical monitoring of air and non-combustible gases. This compact low pressure switch features a manual reset mechanism, ensuring the system remains locked in an alarm state until a technician can verify the cause of the pressure deviation, making it an essential component for HVAC safety limit applications. With an adjustable range of 0.4" w.c. to 1.6" w.c., it offers high repeatability of ±3%, providing reliable performance for clogged filter detection and duct static pressure monitoring.
Built for the rigors of the field, the unit utilizes a silicone diaphragm and a robust SPDT switch rated for 15A at 120-480 VAC. The internal set point adjustment screw is protected within the conduit enclosure to prevent unauthorized tampering after calibration. Its 1/8" female NPT process connections allow for easy integration into existing pneumatic lines, while the vertical diaphragm mounting ensures maximum accuracy for low-range measurements in refrigeration, oven, and dryer systems.
Key Benefits:
- Mechanical Manual Reset: Provides a safety lockout that requires physical intervention, preventing automatic equipment restarts during fault conditions.
- High Current Capacity: The 15A SPDT electrical rating allows for direct control of fans, dampeners, and alarm circuits without always needing auxiliary relays.
- Tamper-Resistant Design: Set point adjustment is located inside the housing, ensuring that calibrated differential pressure settings remain secure.
- Wide Media Compatibility: Ideal for monitoring air or non-combustible gases in cleanrooms, laboratories, and standard air handling units.
- Industry Approvals: Meets UL, CSA, CE, and FM standards for industrial and commercial HVACR installations.
Common Questions:
How do I adjust the set point on the 1900-1MR?
Remove the conduit cover to access the internal adjustment screw; turning the screw changes the spring tension against the diaphragm to reach your desired trip point within the 0.4-1.6" w.c. range.
Can this switch be used in a vacuum application?
The 1900-1MR is optimized for positive pressure applications. For vacuum-only monitoring, the source should be connected to the low-pressure port while leaving the high-pressure port open to the atmosphere.
What is the maximum pressure limit for the silicone diaphragm?
The unit can withstand a continuous pressure of 45" w.c. and a surge pressure up to 10 psig without damaging the internal sensing elements.
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.
