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MPL 9375 Series


MPL / Switches & Sensors 9375 Series /
Low Pressure Switch

The MPL 9375 combines low pressure sensitivity with internal snap action contacts making it ideal for air proving applications such as gas fired heating or appliance exhaust, when long life and high reliability are required for safety, at prices suitable for OEM volumes. Designed for use in the HVAC industry, where reliable air proving is critical to both performance and customer safety, the MPL 9375 Series is a favorite with leading manufacturers of gas-fired warm air furnaces and water heaters. Smaller and lighter than any other HVAC pressure switch, the MPL 9375 is built for the same temperature range and operating life as conventional switches made of stamped steel. The MPL 9375 will perform equally well in other applications which demand low OEM unit cost, robust design, set point accuracy, and high reliability


Applications Include:

  • Air Proven
  • Air Filter Monitoring
  • Exhaust Monitoring
  • Automation
  • Pneumatic Equipment


  • Body: glass-filled polycarbonate
  • Diaphragm: post-cured silicone rubber
  • Terminals: 0.25″ x 0.0319″, 0.187″ x 0.0319″ and 0.187″ x 0.02″ brass.
  • Contacts [9370]: fine silver alloy, point-and-dome
  • Contacts [9371]: gold-platinum-silver alloy, crossbar
  • Actuator: stainless steel
  • Springs: stainless steel, phosphor bronze
  • Operating Temperature: -40° to 85°C (-40° to 185°F)
  • Humidity: 95% RH maximum, non-condensing
  • Operating Pressure: 40 Pa to 500 Pa
  • Maximum Pressure: 1500 Pa
  • Burst Pressure: 35 kPa minimum
  • Mechanical life: Over 1,000,000 cycles
  • Form: SPDT, SPNO, SPNC
  • Resistance: Initial: <50 milliOhms
  • Electrical life:
    • 100,000 cycles min. at rated load.
    • Up to 500,000 cycles (consult factory.)
  • Electrical Ratings:
    • Model 9371:
      • 200mA resistive @ 30 VAC (CE only)
      • 100mA inductive @ 30 VAC (CE only)
      • 0.5A pilot duty @ 24 VAC (UL, CSA)
      • 1.0A resistive @ 24 VAC (UL, CSA)
    • Model 9370:
      • 5A resistive @ 125 VAC
      • 2.5A inductive @ 125 VAC
  • Recommended Mounting Position: Diaphragm vertical. Horizontal orientation is optional, please consult factory for details.
  • Agency approvals:
    • UL, file number MH-16997
    • CSA, file number LR-50215
    • CE approval pending
  • ROHS Compliant

Features & Benefits

  • Customer Engineered Solutions
  • Variable Monitoring Configuration
  • Fixed and Adjustable Set Points
  • Variable Port Configuration
  • Extreme Low Pressure
  • Normally Open/Normally Closed
  • Historically Proven Reliability

Custom OEM Solutions

Product design and customization has been a core service at Micro for over 50 years. With broad multi-industry experience, Micro is tested and trusted by the world’s most experienced and demanding OEMs
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/ ISO 13485:2003 certification / ISO 9001:2008 certification / ITS 16949 6 Sigma