Differential Pressure Sensor Frequently Asked Questions

The PDT2 differential pressure sensor is a wireless, battery-operated differential pressure transmitter engineered for low-pressure air monitoring in building automation systems.

Unlike traditional wired BAS pressure transmitters, the PDT2 is designed around LPWAN communication technologies, specifically:

• LoRaWAN

• NB-IoT

• LTE Cat M1

This architecture enables long-range, low-power, infrastructure-light deployment across commercial and industrial buildings.

Core Characteristics

1. Wireless LPWAN Connectivity

The PDT2 eliminates control wiring by transmitting pressure data over:

• LoRaWAN for private or public LPWAN networks

• NB-IoT / LTE Cat M1 for carrier-based cellular deployments

This allows:

• Retrofit installations without opening walls or running conduit

• Multi-building or campus-wide monitoring

• Direct cloud integration without local BAS dependency

2. Ultra-Low Power, Long Battery Life

The device is battery operated with multi-year operational life (often several years depending on transmission interval and network type).

Low-power design features include:

• Event-driven or periodic transmission modes

• Sleep-cycle optimization

• Efficient LPWAN radio protocols

This makes it suitable for:

• Hard-to-access mechanical spaces

• Distributed sensing across large facilities

• Retrofit projects where power availability is limited

Building Automation Use Cases

HVAC Duct Static Pressure Monitoring

• Wireless measurement of supply and return duct pressure

• Optimization of VFD-controlled fans

• Reduced installation cost in retrofit projects

Air Filter Condition Monitoring

• Pressure drop detection across filters

• Predictive maintenance scheduling

• Avoids unnecessary manual inspections

Cleanroom & Isolation Room Pressurization

• Positive/negative pressure verification

• Compliance with healthcare and pharmaceutical standards

• Remote compliance reporting via cloud dashboards

Building Pressurization & Envelope Monitoring

• Indoor vs. outdoor pressure differential

• Smoke control validation

• Energy efficiency and infiltration analysis

Remote / Distributed Asset Monitoring

Because it does not rely on wired BAS infrastructure, the PDT2 is particularly well suited for:

• Older buildings without modern DDC systems

• Multi-site facility portfolios

• Smart building upgrades without major capital works

Architectural Advantage

The combination of:

• Differential pressure sensing

• LPWAN wireless communication (LoRaWAN / NB-IoT / Cat M1)

• Multi-year battery life

positions the PDT2 as a scalable, infrastructure-light sensing node for modern building intelligence platforms.

In strategic terms, it shifts differential pressure monitoring from a control-wired BAS component to a distributed IoT data source, enabling cloud analytics, predictive maintenance models, and portfolio-level operational optimization.