Critical parameters such as temperature, humidity, pressure, and others must be monitored and recorded in real-time for many applications, preferably with an alert system to create notifications if the parameters exceed the authorized values. Temperature monitoring systems are what they're called. The most common metric measured is temperature, which is why remote temperature monitoring is so popular. There are several sorts of monitoring systems depending on the device's technology, as detailed below:
Real-time monitoring systems based on Ethernet
The sensors are connected to an Ethernet system via CAT6 cables and connectors, similar to how a computer, printer, and other devices are connected. Ethernet ports must be located near each sensor. These can be powered by an electrical outlet or by a POE device (Power over Ethernet). There will be no dedicated base station, but a computer on the network can serve as one.
Real-time remote temperature monitoring system based on Wi-Fi connectivity
There is no need for Ethernet cabling here. The sensor and the central station communicate through Wi-Fi routers, which are also used to link all other PCs. Power is required for a Wi-Fi connection, and if you want continuous data transfer, you may need to use sensors that are supplied by an AC source. There are gadgets on the market that gather data continually and store and transfer it just once or twice a day. Because these systems only connect to Wi-Fi once or twice a day, they may run for a long time on their battery.
Real-time remote temperature monitoring system based on radio frequency
These are radiofrequency devices. When choosing a gadget, make sure it operates on the radio frequency that has been allowed by the local authorities. The supplier must obtain government permission for the item. The communication range of these devices from the base station is rather long. The sensors operate as transmitters, while the base station works as a receiver. The sensors and the base station will be in constant communication. Such a sensor requires extremely little power to function and hence has a long battery life without the need for a power supply.
Real-time monitoring system based on the ZigBee protocol
The latest technology, Zigbee, has a direct range of up to 1 kilometre in the air. If there are any obstacles in its way, the range is reduced proportionately. In most nations, Zigbee works within a permissible frequency range. Zigbee sensors use relatively little power and hence may work without the use of electricity.
Temperature sensors, humidity sensors, pressure sensors, and other sensors are used in the core concept of all such systems. These sensors collect data at predetermined intervals called sampling intervals.