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MPL 9390 Series


MPL / Switches & Sensors 9390 Series /
Low Pressure Switch

The MPL 9390 series is a pressure to voltage transducer with output conditioned and amplified by a programmable ASIC, suitable for blower vacuum, combustion air modulation, liquid level and many other applications. Differential or vacuum-only models are available. Standard models are available for 0-4 or 0-10 in/H2O with output of 0-5VDC.


The MPL 9391 is ideal for new high-efficiency heating applications requiring feedback for intelligent controllers, ECM motors, logic-controlled blowers and other smart components for modulating furnace control applications.


Applications Include:

Low pressure, variable output sensor, combining diaphragm and strain gage technologies to provide an economical but robust alternative.

  • Air Flow Monitoring
  • Process Controls
  • Blower Modulation
  • Automation
  • D & C Monitors
  • Medical Equipment


  • Absolute Pressure: 4 in (H20)
  • Proof Pressure: 3PSI
  • Burst Pressure: 5PSI
  • Supply Voltage: 5.0 ± 0.2 Vdc
  • Supply Current: 25mA (max)
  • Output Voltage (Ratio-metric): 0.19 to 4.06V
  • Zero / Null Pressure: 250 mVdc ± 60mV
  • Span: 3.75 Vdc ± 60mV
  • Ratio-metric Voltage: ± 1.5 % of span Max 4.8 to 5.20 Vdc Supply
  • Temperature Effects: (0 to 60 C) ± 2% of span Max
  • Operating Temperature: 0 to 60º C
  • Storage Temperature: – 40ºC to + 95ºC
  • Humidity: 95% RH
  • Weight: 9.8 grams
  • Electrical Termination: 3 pin male connection port
  • Preferred Mounting: Vertically
  • Pressure Connection: 3/16” Axial diameter tube fitting
  • Over Voltage Protection: 9 Vdc
  • Listings: UL

Features & Benefits

  • Customer Engineered Solutions
  • Temperature Compensated
  • Ratio Metric Output
  • Silicon Sensing Technology
  • Flexible Set Point Range
  • Various Configuration Available
  • 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