There are many applications, which required a controlled room pressure. In all such cases, we need room pressure monitoring systems for continuously checking the pressure. This can be absolute pressure monitoring or relative pressure monitoring. In the case of absolute pressure monitoring, the customer needs to maintain a particular pressure value. In certain other applications, we require relative pressure difference. Relative pressure will be either positive pressure or negative pressure in relation to the pressure immediately outside this room.
Room pressure monitoring systems with pressure sensors
In all pressure monitoring systems, the system has to measure the pressure of the air. For this purpose, there will be a small opening in the unit, which is open to the air. There will be a membrane as part of the pressure sensor, which measures the air pressure. For measuring the absolute pressure, we will need only one such pressure sensing diaphragm. However, for a negative or pressure monitoring, we will require a system with two sensors. We are measuring the negative or positive pressure with respect to the pressure outside the room. Hence, the system needs to measure the pressure inside the room as well as outside the room.
Negative pressure monitoring sensor system
As an example, an isolation ward in a hospital will be a negative pressure room. The pressure is always slightly lower than the outside areas. In this case, the bacteria inside the room will not go to the outside of the room. As the pressure is always negative, there will be a tendency for outside air to enter into this room, but not vice versa. Hence, the contaminated air from the patient room will not go outside this room. Our control panel will constantly show the pressure difference between the rooms. In case the pressure difference reduces, the system will generate an alert. It is possible to connect different alert systems such as phone call, SMS alerts or a local siren with flashing light. In both the case of negative and positive pressure systems, the pressure sensors are the same. It is only the difference in configuration of the pressure values. As these sensors are for monitoring difference in pressure, technically these are differential pressure monitoring system.
Positive pressure monitoring sensors
An example of a positive pressure room will be Central Sterile Supply Department (CSSD) in a hospital. This room
contains sterile items in a hospital. Contaminated air from other areas should not enter this room. Hence, this room has a slightly higher pressure than the outside. The air inside the CSSD room may go out of the room, but not vice versa. In case the air pressure inside the CSSD room becomes equal to the outside air pressure, it is an alarm condition. Our system will immediately make a phone call, SMS, and local alarms. Eg. If the pressure in the corridor is 101 kPa, the CSSD room will be at 105 kPA. In case the pressure of the CSSD room comes down to 102 kPA, the system will generate an alert.
Differential Room Pressure recording connected to BMS
We can connect our differential room pressure monitoring system to a central recording system. If you want to record only pressure separately it is possible. If you have many such rooms, we can centralize all the data and store in a cloud-based server. Also, we can connect our differential pressure sensors to automation systems through Modbus, BACnet etc. We can also connect to your existing BMS but may require modifications to the existing systems. Our automation team will be able to assist you in this regard.
Negative and positive pressure monitoring with phone, SMS, Siren alert
Our differential monitoring system has audiovisual alerts on the control panel itself. In the case of an alert, there is a local beep and the screen will flash red. Apart from this, we can connect a SIM card based phone call alert system. This phone dialer system will generate calls to 4 operators and send SMS also simultaneously. It can deliver a custom-recorded voice message such as ‘pressure is low in CSSD room 2’. The system will call the operators one by one until anyone picks the call. All the people will receive SMS alerts simultaneously.
Isolation room monitoring and alert
The same system is useful for isolation rooms in hospitals. It is mandatory to keep the negative pressure inside an isolation ward. This means that the pressure in this room should be lower than that of outside rooms, corridors etc. This will prevent infected air from entering into other areas. In order to monitor this, you can use our system. One pressure sensor will be inside the isolation room and the other will be outside the room. The system will continuously check that the pressure inside the room is always at a negative pressure. Otherwise, the system can provide alerts as programmed.
Price of differential pressure monitoring systems
Our simplest room pressure monitoring system consisting of one sensor and receiver starts from US$ 1,220.00 (Taxes and Duties in your country will be extra). It is very easy to install by any technician with simple instructions. We are supplying the same in programmed conditions. Hence your technician need not worry about additional programming.