Description

Features
• Loop powered 4 to 20 mA output signal (QBE3100)
• SPDT contact output (QBM81)
• Compact construction
• Integral mounting bracket and snap-on cover with a
single screw for fast and easy installation
• Resettable zero point for different mounting positions
(QBM3100)
• Ultra-low susceptibility to temperature
• No mechanical aging

Applications
QBM Series Differential Pressure Devices can be
used in a wide range of HVAC and general building
management applications where differential air pressure
monitoring in required.
Typical applications for the QBE3100 include control of
variable speed fans in VAV systems and monitoring of
pressure differentials in clean room applications.
The QBM81 can be wired NO or NC and provide a digital
output with adjustable differential pressure trip point.
Common applications include monitoring of air filters
and general indication of high/low differential pressure
situations.