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Compel Groupgroup

Temperature Sensors

11 products available

Looking for a reliable industrial temperature sensor for your process monitoring or machinery integration? Compel supplies a comprehensive range of temperature probe options engineered for demanding trade, commercial, and industrial environments. We supply precise PT100 RTD sensors, heavy-duty K-type thermocouples, NTC thermistors, and digital DS18B20 probes. These units deliver accurate thermal data in demanding operating conditions.

We serve system integrators, HVAC technicians, and plant maintenance engineers who require dependable components. Whether you need a waterproof temperature sensor with a stainless steel probe for liquid monitoring or a ceramic-sheathed thermocouple for high-temperature kilns, Compel stocks the exact specifications your systems require. We ship quickly from regional distribution centers to keep your operations running on schedule.

Selecting the Sensor Element Type

Choosing the right sensor element depends on your target temperature range, accuracy needs, and controller compatibility. Resistance Temperature Detectors (RTDs) like the pt100 sensor and PT1000 offer high accuracy and stability over moderate ranges. Thermocouples handle much higher temperature limits but trade off a small amount of accuracy. Thermistors offer high sensitivity for narrow temperature bands.

  • RTD (PT100 / PT1000): Features Class A or B accuracy conforming to IEC 751 standards. Excellent for precise monitoring between -50 and 200 degrees Celsius.
  • K-Type Thermocouple: Best for extreme heat. Ceramic probe designs work well in high-temperature industrial kilns.
  • NTC Thermistors: Available in 5K to 50K Ohm resistance options. Great for HVAC copper-head contact lines and W1209 or W1401 controllers.

Matching Probe Materials to Your Environment

The probe housing must withstand the chemical and physical demands of your application. Moisture, corrosive chemicals, and physical impact can destroy unprotected sensor elements quickly. Select a material that matches the fluid or gas you are measuring.

  • 304 Stainless Steel: Provides excellent physical protection. It resists corrosion in water, air, and mild chemicals. This material is standard for general waterproof and dustproof probes.
  • Ceramic Tubes: Necessary for protecting a k type thermocouple probe in high-heat environments like ovens and kilns where metals oxidize.
  • Copper: Best for contact-based surface measurements. Copper heads transfer heat quickly to NTC sensors in air conditioning and solar water systems.

Determining Probe Dimensions and Cable Options

Physical fit prevents sensor failure and ensures fast thermal response times. Consider probe diameter, length, and cable jacket materials before purchasing. A needle tip probe reacts quickly to temperature shifts due to low thermal mass. Larger 6x30mm stainless steel housings offer more durability.

Cable length must reach your controller without excessive tension. Compel stocks cables in standard 1m, 2m, 3m, and 5m lengths. For high-temperature paths, select silicone cable jackets to prevent melting.

Buying guide

Choosing Temperature Sensors

What standards govern the accuracy of your RTD sensors?
Our PT100 and PT1000 RTD sensor probes conform to the IEC 751 standard for Class A or Class B accuracy. These international tolerance classes define the allowable deviation across the sensor temperature range. This compliance ensures reliable and repeatable measurements in industrial process control.
When should I choose a ceramic probe over a stainless steel temperature probe?
Choose a ceramic tube probe for extreme high-temperature applications, such as industrial kilns, where stainless steel would degrade or melt. Stainless steel probes are ideal for waterproof, dustproof, and general-purpose machinery applications up to 200 degrees Celsius. They offer superior physical durability at lower temperatures.
How do I select the right resistance value for NTC thermistor replacement?
Match the nominal resistance at 25 degrees Celsius, such as 5K, 10K, or 50K Ohm, to your controller specifications. For instance, our 10K waterproof thermistor probes are designed for direct compatibility with W1209 and W1401 digital temperature controllers. Always check your controller manual for the correct B-constant value.
What are the voltage and temperature limits for DS18B20 digital sensors?
The DS18B20 digital sensors operate on a voltage range of 3.0V to 5.5V. They feature waterproof stainless steel housings, making them highly reliable for liquid monitoring. Always verify the specific cable material limits in your system technical datasheet before deployment.
How do probe dimensions affect thermal response times?
Smaller probe diameters, like our needle-tip RTD probes, offer faster response times due to lower thermal mass. For heavy-duty machinery installations, larger probes like the 6x30mm stainless steel housing provide better mechanical protection. This added protection results in a slightly slower thermal stabilization time.