Temperature Sensor

Advantages of using temperature sensors compared to analog switch-type thermometers

One of the most important aspects in the industry is controlling the process temperature within the desired range. Typically, when the temperature drops below the operating level, the heat-generating source must be activated to supply the required energy.

This heat-generating source can be a lamp in an incubator, a heater in a boiler room, a burner in a furnace, and so on. In cases of temperature increase, the use of fans and cooling machines (compressors) is also common.

An important point is the timing of when these devices are activated in the process, which is controlled by thermoswitches or temperature controllers.

In this way, the desired temperature is set as the set point by the user, and when the process temperature reaches the set point, the contact is triggered and, for example, the heater is turned on.

To have a contact at a specific temperature, temperature sensors (thermocouples or RTDs) with a controller or analog switch-type thermometers can be used.

The advantages of using temperature sensors with a controller instead of analog thermoswitches include the following.

Much higher accuracy (temperature sensors usually have an accuracy below 0.1%, while analog thermometers typically have about 1% accuracy).

Much wider temperature range (analog thermometers can measure temperatures up to a maximum of 800°C, whereas thermocouples can measure temperatures above 2000°C).

Much faster response time (depending on sensitivity, the reaction time may vary).

More affordable price

The ability to record temperature at different time intervals (data logging) using a temperature controller (for example, the controller can record the temperature over the past 72 hours at 30-minute intervals).

The company (Isatis Process Instruments / Daghigh Process Control) can supply RTD temperature sensors and (K, J, S, R, …) thermocouples with immediate delivery, along with controllers, transmitters, and thermowells.