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Overview
The Dwyer 1823-0 is a compact, low differential pressure switch designed for general industrial service. This unit features a pressure range of 0.15–0.5″ w.c. (water column) and delivers reliable switching action with ±2% repeatability for demanding applications including process control and mechanical equipment monitoring. The integral set-point adjustment allows field configuration without removing the switch from the mounting location.
Key Features
- Pressure range: 0.15–0.5″ w.c. with adjustable set points
- 2% repeatability—accurate, repeatable switching across temperature and pressure cycles
- SPDT (single-pole double-throw) contact configuration for flexible control logic
- Compact design with low-cost manufacturing for high-value industrial applications
- Internal set-point adjustment accessible from external mounting stud
- Suitable for air and non-combustible gases only
Technical Specifications
- Pressure Range: 0.15–0.5″ w.c.
- Deadband (Hysteresis): Approx. 0.06″ w.c. at both minimum and maximum set points
- Repeatability: ±2%
- Switch Type: SPDT (Single-Pole Double-Throw)
- Port Connection: 1/8″ NPT
- Electrical Connections: 3 screw-type terminals
- Operating Temperature: −30 to 180°F (−34 to 82.2°C)
- Maximum Pressure Limit: 10 psig (68.95 kPa)
- Media: Air and non-combustible gases
- Series: 1800 Low Differential Pressure
Typical Applications
- Process control and monitoring in manufacturing plants
- Mechanical equipment control (fans, pumps, compressors)
- Filter condition monitoring and clogging detection
- Air/gas line pressure supervision
- Building automation and HVAC pressure control
Compatibility & Replacements
Compatible With
- 1/8″ NPT manifolds and panel-mount enclosures
- General industrial 3-screw terminal junction boxes
- Pneumatic and gas control systems operating below 10 psig
- Filter, duct, and pressure-sensing applications
Replaces / Drop-In Replacement For
- Other Dwyer 1800 Series low differential pressure switches with 0.15–0.5″ w.c. range
- Generic 1/8″ NPT, 2% repeatability low-pressure switches in similar range
Works With
- Pneumatic automation control systems
- Building management systems (BMS) for HVAC pressure supervision
- Industrial process control logic and interlocks
- Filter maintenance and condition monitoring networks
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