Temperature sensors are unique instruments that measure the temperature of a given surrounding, object, liquid, solid, or gas. A precise reading is important for controlling and maintaining the required climate in commercial, industrial, and residential settings. These sensors can be called either contact or non-contact.
In this post, we will discuss everything that you need to know about contact type sensors.
What are Contact Type Temperature Sensors?
There are some temperature meters that measure the extent of coolness or hotness in an object by being in direct touch with it. Such sensors come under the category of contact type sensors. They can be employed to identify liquids, solids, or gases over a wide temperature range. They are utilised when you can make effective thermal contact with an object. They are employed to check the temperature when it is anticipated to be less than 3400 °F (1700 °C) or more than -40 °F (-40 °C).
How Do Contact Temperature Sensors Work?
Contact type sensors measure temperature by getting into direct contact with the object of interest. They are the most normal type of temperature sensor and are employed in various industrial applications.
These sensors work by measuring the energy of heat that is shifted from the object to the sensor. The most common types are thermistors, thermocouples, and resistance temperature detectors, each using various methods to measure and assess temperature.
What are the Different Types of Contact Temperature Sensors?
1. Thermocouples
Thermocouples measure the voltage produced by two different metals when combined. The temperature difference between the two different metal wires creates an electrical current to flow, which the thermocouple evaluates. These self-mechanised sensors are the most prominent types in the industry. They have a varied temperature range and quick response times and can be employed in several forms. Thermocouples are used in automotive, industrial, and household appliances.
2. Thermistors
Thermistors measure the semiconductor material’s resistance when exposed to diverse temperatures. As the temperature of the material varies, so does its electrical resistance, which is then measured using a thermistor. They are significant for maintaining patient security and equipment efficiency. They are employed in body temperature tracking systems and catheters.
3. Resistance Temperature Detectors (RTDs)
RTDs measure temperature by evaluating the resistance of a wire when it comes into contact with different temperatures. As the temperature of the wire differs, so does its electrical resistance, which is then evaluated using RTD. They link the resistance of the RTD component with temperature to measure the hotness or coolness. They are the most effective and are normally the most expensive ones.
Benefits and Drawbacks of Contact Type Sensors
1. Contact type sensors are generally used in conditions where precision is of utmost importance and contact with the object is feasible, for example, in pharmaceuticals, medical, and food processing.
2. The main benefits are their accuracy. In addition, they are not impacted by background radiation and are less probable to be obstructed by dirt or dust.
3. The main drawbacks are the prospective logistical restrictions of coming into touch with the object of interest. In addition, they can be harmed, and if they are an internal constituent of a bigger mechanism, fixing and changing a contact thermal sensor may be costly and need technical knowledge.
Some Tips for Effective Use of Contact Type Sensors
Here are a few effective tips for using contact type sensors:
1. Placement
Select a place that correctly shows the temperature you are looking to measure. The sensor must be accessible for maintenance and stay away from heat sources such as direct sunlight or motors.
2. Mounting
Ensure the mounting surface is dry, clean, and free from any pollutants. The sensor must fit well to decrease sensor lag and air insulation.
3. Calibration
Prior to use, calibrate the sensor to make sure it has correct readings.
4. Sealing
Depending on the application, you may need to seal the sensor to safeguard it from dust or moisture.
5. Testing
Check the sensor to ensure it is working well.
6. Maintenance
Clean the sensor daily as per the manufacturer’s suggestions. Check for indications of damage or wear and address problems quickly. Keep the sensor in perfect surroundings to safeguard its accuracy.
7. Documentation
Keep details of the sensor’s calibration, installation, and performance.
8. Integration
Incorporate the sensor into your control or tracking system.
Contact type sensors measure the temperature of a substance or object via direct contact. They can be employed to identify a wide variety of temperatures in liquids, solids, or gases.
Final Words
In conclusion, choosing the right contact temperature sensor is important. It must align with the application’s particular requirements, such as temperature range, environmental situations, required response time, and whether direct contact is possible.
These sensors are made with durability and accuracy in mind, making sure long-term accuracy and reliability, even in challenging situations. Whether you require sensors that provide quick response, wide temperature ranges, or particular environmental tolerances, Tempsens Instrument Pvt. Ltd. provides options tailored to meet specific industrial demands.
