Introduction

MPL 9370 Series switches offer pressure, vacuum and differential models capable of sensing very low setpoints, and switching current up to 5A resistive, 2.5A inductive. Designed for use in the HVAC industry, where reliable air proving is critical to both performance and customer safety, the MPL 9370 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 9370 is built for the same temperature range and operating life as conventional switches made of stamped steel.

The MPL 9370 will perform equally well in other applications which demand low OEM unit cost, robust design, setpoint accuracy, and high reliability.

View Schematic

Description

The MPL 9370 features a unique integral snap switch, with positive snap action and self-wiping silver contacts for ultra-reliable switching. The molded silicone diaphragm converts very low pressure or vacuum into movement of an actuator disk, which operates the silver alloy contacts.

Specifications

• Body: glass-filled polyester, grade SEO
• Diaphragm: post-cured silicone rubber
• Terminals: 0.032" x 0.250" copper alloy
• Contacts [9370]: fine silver alloy, point-and-dome
• Contacts [9371]: gold-platinum-silver alloy, crossbar
• Actuator: stainless steel
• Operating Temperature: -40 to +85C (-40 to +185F)
  • Pressure:
• Operating: 0.15 in/H 2 O to 34 in/H 2 O
• Proof: 100 in/H 2 O (3.6 psi)
• Burst: 5 psi minimum
• Mechanical: Over 1,000,000 cycles
• Form: SPDT
• Resistance: 1 ohm maximum
• Resistance: Initial: <50 milliohms

Electrical

The MPL 808 incorporates standard high reliability snap action switches. Depending on pressure setting, ratings are available from 3A to 25A, and 0.1HP to 1.0HP. Special contacts are available for low current applications.

Mounting Options

The MPL 9370 can be mounted with diaprhagm perpendicular or parallel to level, as required by application (Orientation must be included in user specifications. Perpendicular mounting recommended.) Standard mounting brackets are lightweight metal with unique features for flexible orientation of pressure port.