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Using Ellenex's LoRaWAN differential Pressure Sensor and to Maintain Negative Pressure in Hospital Construction Projects

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Construction projects in operational hospitals present unique challenges. One of the most critical issues is controlling airborne contaminants, particularly dust, which can severely impact patient safety in adjacent, active hospital sections. Negative pressure rooms are commonly used to contain dust and prevent its spread during construction work. For a large construction company in Canada handling hospital projects, precisely monitoring and maintaining negative pressure is essential for ensuring both the safety of patients and the smooth continuation of medical operations.

The challenge lies in achieving reliable, long-range monitoring of negative pressure conditions in various sections of a large construction site, especially when hospital environments must remain operational during the project. Ellenex's PDT2-L pressure sensor, combined with the power of LoRaWAN technology, provides a robust and scalable solution for real-time monitoring of pressure differentials in hospital construction areas, ensuring safety and regulatory compliance.


In high-stakes environments like hospital construction, precision and reliability are non-negotiable. With collaboration of our partner in Canada, Ellenex’s LoRaWAN differential pressure sensor, implemented to safeguarding lives and ensuring seamless operations.

Why Monitoring Negative Pressure is Critical in Hospital Construction

During construction projects within hospitals, dust, debris, and airborne particles can be a serious hazard, particularly in areas such as intensive care units, operating rooms, and wards where patients are highly susceptible to infections. Maintaining a negative pressure environment ensures that contaminated air does not flow into operational parts of the hospital, but rather is contained and filtered out.

For the construction company, the ability to continuously monitor negative pressure in real time across multiple construction zones without manual intervention is critical. Using traditional pressure monitoring systems can be cumbersome, involving wired connections that may not be feasible in complex, multi-floor construction sites. This is where LoRaWAN technology makes a significant difference.


Using LoRaWAN and Ellenex’s PDT2-L Sensor to Maintain Negative Pressure in Hospital Construction Projects


LoRaWAN Technology: Advantages for Large Construction Projects

LoRaWAN (Long Range Wide Area Network) is a low-power, long-range wireless communication protocol specifically designed for IoT (Internet of Things) applications like environmental monitoring, industrial controls, and smart infrastructure. It has quickly gained prominence due to its ability to transmit data over long distances while consuming minimal power, making it a perfect fit for large construction sites and remote monitoring.

Here are some key advantages of LoRaWAN technology for construction projects:

  1. Long-Range Communication: LoRaWAN’s range can extend over several kilometers, allowing the construction company to monitor negative pressure conditions throughout large and complex hospital construction sites. This long-range capability is particularly beneficial in hospital environments where construction zones may be far from the monitoring station or control room.

  2. Low Power Consumption: Devices like the PDT2-L sensor are battery-powered, and with LoRaWAN’s low power requirements, these sensors can operate for extended periods without frequent battery changes. This reduces maintenance costs and downtime, allowing construction teams to focus on their work without constant sensor upkeep.

  3. Scalability: LoRaWAN supports a large number of devices within a single network. For a large construction company managing multiple hospital projects simultaneously, LoRaWAN makes it easy to deploy and scale the monitoring system as needed. Whether the project is confined to a single wing of a hospital or spans multiple buildings, the system can be easily scaled to accommodate the required number of sensors.

  4. Penetration through Obstacles: One of the most significant advantages of LoRaWAN is its ability to penetrate through walls and other obstacles. In hospital construction, where construction areas may be located in complex and dense environments, LoRaWAN ensures that data from the PDT2-L sensors reaches the control center without the need for additional repeaters or signal boosters.

  5. Near Real-Time Monitoring: With LoRaWAN, real-time data from multiple differential pressure sensors an be collected and transmitted to a central monitoring platform, ensuring that any deviations in pressure levels are detected immediately. This allows the construction company to take prompt action if pressure levels begin to rise, mitigating any risks of dust contamination in operational hospital areas.

  6. Cost-Effective Infrastructure: LoRaWAN networks require minimal infrastructure compared to traditional wired systems. This reduces installation costs and the complexity of setting up monitoring systems in dynamic construction environments. The ability to deploy wireless sensors without worrying about cabling also reduces the risks of interruptions or downtime during construction.


Case Study for LoRaWAN differential Pressure Sensor: Monitoring Negative Pressure in Canadian Hospital Construction Projects

For a leading construction company in Canada, working on a hospital expansion project posed the challenge of maintaining strict negative pressure in the construction zones to prevent dust from contaminating the operational parts of the hospital. With multiple rooms and zones requiring simultaneous monitoring, they needed a solution that could provide real-time data and allow them to quickly respond to any pressure deviations.

Ellenex provided a customised solution based on the PDT2-L sensor's capability, a low-range differential pressure sensor designed for environments where precise pressure control is critical. With a range of up to either 500 pascals or 125Pa, the PDT2-L is ideal for monitoring negative pressure conditions in hospital construction projects. By leveraging the LoRaWAN communication protocol, the construction team was able to deploy multiple sensors across the site, providing continuous data on pressure levels.


The sensors were configured to alert the team instantly if pressure levels deviated from the target range, ensuring that any potential breaches in dust containment could be addressed before posing a risk to the hospital. The result was a successful construction project where hospital operations were unaffected by the construction work, and all safety standards were met.


Overcoming Challenges with Ellenex’s PDT2-L and LoRaWAN

The primary challenge in hospital construction projects is maintaining control over environmental conditions, particularly air quality, without disrupting ongoing medical activities. Traditional pressure monitoring systems require significant wiring and power, which are often impractical in construction zones. With LoRaWAN, however, this challenge is easily overcome.

The PDT2-L sensor, with its ability to monitor low pressure ranges, coupled with the flexibility of LoRaWAN, ensures that the construction company can monitor pressure remotely, over long distances, and with minimal infrastructure. This not only reduces operational costs but also ensures compliance with hospital safety regulations. The construction team can focus on the task at hand, knowing that the air pressure in all sensitive areas is being continuously monitored.

considering limitations of LoRaWAN technology and restrictions on the fast sampling rate battery operated devices, we implemented custom version of firmware with capability of switching from the certain sampling rate to the quicker rate immediately after detecting the change in pressure.


For the construction companies, particularly those working on sensitive projects like hospital expansions or renovations, maintaining air quality and negative pressure is non-negotiable. The combination of Ellenex’s PDT2-L sensor and LoRaWAN technology offers a reliable, scalable, and cost-effective solution to monitor and maintain negative pressure in construction zones, ensuring dust and contaminants remain contained.


By implementing this solution, construction companies can enhance safety, reduce operational risks, and comply with hospital regulations while working efficiently on their projects. The benefits of LoRaWAN’s long-range, low-power communication paired with Ellenex’s cutting-edge sensors ensure that the construction industry is equipped to meet the demands of complex, large-scale projects.

For more information on how Ellenex’s solutions can help your next construction project, visit:

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  • Air Compressor Operation Monitoring

  • Asset Cathodic Protection Monitoring

  • Asset Temperature Monitoring

  • Boilers Pressure and Temperature Monitoring

  • Building Structural Health Monitoring

  • Chemical Tanks Level Monitoring

  • Data Centre and Clean Room Pressure Monitoring

  • Diesel Delivery Management

  • Differential Pressure Monitoring

  • Dump Truck Overload and Operation Monitoring

  • Dust Collection System Monitoring

  • Farm Fish Operation Monitoring

  • Flood Monitoring

  • Frozen Food Delivery Management

  • Grain Silo Level Monitoring

  • HVAC Air Filter Performance Monitoring

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  • Industrial Gas Cylinders Level Monitoring

  • Industrial Water Meters Digitalisation

  • Land Movement Monitoring

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  • Negative Pressure Monitoring

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  • Soil Moisture Monitoring

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Key pre-configured Industrial IoT solutions

Main Industrial IoT Sensors: 

  • PTS2: Industrial Pressure (0.2bar to 1,000bar)

  • PTC2: Corrosive Resistant Pressure

  • PTD2: Pressure Sensor with Built-in Temperature Sensor

  • PTDH2: High Temperature Pressure and Temperature Sensor

  • PTG2: Pressure with Built-in GPS

  • PTS3: IP68 Pressure Sensor

  • PTF2: Flush Type Pressure Sensor

  • PTF2: Thich film Flush type Pressure

  • PTE2: Earth Pressure Sensor

  • PDS2: Industrial Differential Pressure Sensor

  • PDG2: DP with Built-in GPS

  • PDT2: Ultra Low Range Air Pressure and Temperature

  • PLS2: Submersible Level (1m to 200m range)

  • PLC2: Corrosive Resistant Level (Titanium)

  • PLD2: Level Sensor with Built-in Temperature

  • PLG2: Level Sensor with Built-in GPS

  • PLS3: Submersible Level Sensor with IP68 Housing

  • PLM2: Well Level Sensor (15.8mm Sensor Head, 2in Housing)

  • PLMD2: Well Level and Temperature Sensor

  • TTS2: Industrial Temperature Sensor

  • TTG2: Temperature Sensor with Built-in GPS

  • TTS3: Temperature Sensor with IP68 housing

  • TTS2: Pipe Temperature Sensor

  • DUS3: IP68 Ultrasonic Level Sensor

  • DRC3: IP68 Corrosive Radar Sensor (8m and 30m range)

  • FMS2: Industrial Water Meter Interface

  • CSD2: Conductivity Salinity and Temperature sensor

  • CTR2: Turbidity and Temperature Sensor

  • CPH2: pH, ORP and Temperature Sensor

  • CDO2: Dissolved Oxygen and Temperature Sensor

  • MSS2: Soil Moisture Sensor

  • MAS2: Outdoor Humidity Sensor

  • MRS2: Rain Sensor (Tipping bucket)

  • ECP2: Cathodic Protection Sensor

  • RS1-4/20: Single channel 4-20mA Interface

  • RS1-P: Single channel Pulse Interface

  • RS1-SDI: Single channel SDI-12 Interface

  • RS1-M: Single channel Modbus Interface

  • RS1-Pt: Single channel Pt100 Interface

  • RM1: Multi-channel Interface

  • RM4-4/20: Multi-channel Interface (4 x 4-20mA Sensor)

  • RM4-Pt: Multi-channel Interface (4 x Pt Sensor)

  • RM4-M: Multi-channel Interface (4 x Modbus)

  • RM4-mV: Multi-channel Interface (4 x mV Sensors)

  • RM4-Pulse: Multi-channel Interface (4 x Pulse Counter)

  • RM4-0/10: Multi-channel Interface (4 x 0-10V Sensor)

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