Dwyer Photohelic Switch 3000MRS-00 3000MRS-0 3001MRS 3002MRS Differential Pressure Gauge

The Dwyer Photohelic Switch Series combines pressure gage functionality with solid-state switching capabilities, designed for reliable performance in industrial applications. Engineered to maintain gage readings unaffected by switch operations--even during power loss--these switches feature external zero and range adjustments, eliminating the need for disassembly during normal service.

• Independent Gage & Switch Operation: Gage readings remain accurate regardless of switch activation, ensuring continuous pressure monitoring. Maintains pressure display during power outages for critical system visibility.
• User-Friendly Calibration: Zero and range adjustments accessible outside the gage housing, simplifying on-site maintenance without disassembly.
• Solid-State Durability: High-cycle switching capability suitable for frequent operation in automated control systems. Reduces wear compared to mechanical switches, enhancing long-term reliability.
• Configurable Options:
  • TAMP: Tamper-proof knobs with spanner key for secure set point adjustments.
  • LT: Low-temperature compatibility for use below 20°F (-6.7°C).
  • MP/-HP: Medium (35 psig) or high (80 psig) pressure ratings for robust system integration.
  • WP: Weatherproof housing for outdoor or harsh environment installations.
• Versatile Application: Ideal for HVAC, filter monitoring, and industrial processes requiring both pressure indication and automated switching.
• Reliable Performance: Mechanical design ensures consistent pressure measurement alongside solid-state switching precision.