Comparison of Temperature Sensors Offered by Dracal Technologies

Mouse click to a list and temperature sensor icon

This Dracal Technologies USB sensor selection guide provides a summary of the main features of each sensor. You will then see a table to help you choose among our 10 USB sensors the one that best suits your application, allowing you to obtain temperature measurements adapted to your project.

Presentation of the features

Here is a brief description of each of the features that will be used in the following table, allowing an at-a-glance comparison of the various Dracal Technologies USB sensors.

  • Sensor precision
    • The precision is the smallest difference observed between two measurements when the experiment is repeated under exactly the same conditions. It corresponds to the random error.
  • Instrument resolution
    • Resolution is the smallest change detected by the sensor. The smaller the resolution, the more precisely the observed temperature changes.
  • Probe protection
    • Many of our sensors are used to measure air temperature and have adequate protection for dust and other particles. Some sensors are used for other purposes and the enclosure around the probe is adapted to these other uses.
  • Instrument responsiveness
    • It is related to several factors, including the type of sensor and its protection. The time constant (t63%) is a measure of the time it takes for the sensor to reach 63% of its final value. For example, for a sensor that goes from 0°C to 70°C, the time constant is the time it takes the sensor to reach 44.2°C.
  • Temperature range
    • The temperature range is the minimum and maximum temperature that can be measured with the sensor. It depends on the probe used and the materials it contains. Thermocouples and RTD probes allow the largest temperature ranges to be measured.

Dracal 10 USB temperature sensors at a glance. Both all-in-one instruments and adapters

 

Comparative table of the ten sensors

Below, you will find a table of the temperature sensors offered by Dracal Technologies, grouped by type. The SHT digital sensors are integrated in the product in question. For thermocouples and RTD probes, the products described are universal converters working with the probe, either thermocouple or RTD Pt100, of your choice. We also offer these probes, whose links are available in the table.

Product

Picture

Precision (at 25°C)

Resolution

Protection

Responsiveness (t63%)

Range

Main application

TMP125

TMP125 USB Temperature Sensor

±0.5°C

±0.5°C

watertight casing

8 s

-55°C to 75°C

Air temperature under various conditions

Warehouse, Server room

PTH200, TRH320

TRH320: Temperature and relative humidity USB sensor - Front View with USB plug

±0.3°C

±0.015°C

PTFE(1) membrane

PET(2) mesh

8 s

-40°C to 70°C

Precise air temperature

Environmental chamber, Weather station, Physical engineering

PTH420, TRH420

PTH420: USB-connected precision (±0.1°C/±1.5 %RH) temperature, relative humidity and atmospheric pressure measuring instrument (sensor) - Front view with USB Plug

±0.1°C

±0.015°C

PTFE membrane

PET mesh

8 s

-40°C to 70°C

Air temperature requiring increased precision

Biomedical engineering, Research

PTH450, TRH450

PTH450: Improved accuracy (±0.1°C/±1.5 %RH) temperature, relative humidity and atmospheric pressure measuring instrument with USB connection, particle filter and aluminum tip for harsh environments - Front view with USB plug

±0.1°C

±0.015°C

PTFE membrane

aluminum casing

8 to 10 s 

-40°C to 125°C

High air temperature and harsh environments

Environmental studies, Material engineering, Vivarium

TRH200

TRH200: USB Temperature and Relative Humidity Sensor With Exposed End - USB Plug and End

±0.1°C

±0.01°C

exposed sensor

5 s

-40°C to 70°C

Surface temperature

Material temperature, OEM integration

In combination with our TMC-K-A-5 (Type K thermocouple)

TMC100k

TMC100k: USB adapter for any type-K thermocouple for temperature measurement - Front view - With connected thermocouple

±2.5°C

±0.0625°C

none

instant

-50°C to 200°C

High contact temperature

Industrial processes, Water bodies

TMC200k

TMC200k: high resolution USB adapter for any type-K thermocouple for temperature measurement - Front view - With connected thermocouple

±2.5°C

±0.00005°C

none

instant

-50°C to 200°C

High contact temperature and observation of small temperature changes

Pharmaceutical and food processes

In combination with our RTD-Pt100-SIL (RTD-Pt100 probe)

RTD_23

RTD_23: USB adapter for any Pt-100 RTD probe for temperature measurement - With Pt100 probe

±0.41°C

±0.02°C

stainless steel

5 to 10 s

-200°C to 200°C

Very low contact temperature

Aerospace engineering and robotics

RTD200

RTD200: USB adapter for any Pt-100 RTD probe for temperature measurement - With Pt100 probe

±0.41°C

±0.02°C

stainless steel

5 to 10 s

-200°C to 200°C

Wide contact temperature range and easy connection

Biomedical engineering

RTD300

RTD300: USB adapter for any Pt-100 RTD probe for temperature measurement - With Pt100 probe

±0.351°C

±0.0005°C

stainless steel

5 to 10 s

-200°C to 200°C

Wide contact temperature range and observation of small temperature changes

Biomedical engineering, Certification

  1. Polytetrafluoroethylene

  2. Polyethylene terephthalate

Note that some of these USB sensors can measure something other than temperature! The TRH series offers USB temperature and humidity sensors, while the PTH series adds atmospheric pressure to temperature and humidity measurements. So you can find the instrument that meets all your needs, not only for temperature, but also for relative humidity and air pressure. That being said, if you think you will need to diversify your measurement types in the future, our mix & match system allows you to postpone this project without any additional time investment.

In conclusion

At Dracal Technologies, our mission is to help you advance your projects that require accurate measurement of certain parameters, including temperature. With this selection guide, you will easily find many information to help you choose among our 10 USB temperature sensors. If you have any questions, do not hesitate to contact us.

 

References

Ball, S., Ibrahim, D., Ramsden, E., Huddleston, C., Wilson, J. S. (2008). Test and Measurement: Know It All. Pays-Bas: Elsevier Science.

Barani, Jan. “Difference between Sensor Response Time and Sensor Time Constant τ (Tau) 63.2%.” BARANI DESIGN Technologies, May 7, 2019. https://www.baranidesign.com/faq-articles/2019/5/6/difference-between-sensor-response-time-and-sensor-time-constant-tau.

Mekid, S. (2021). Metrology and Instrumentation: Practical Applications for Engineering and Manufacturing. Royaume-Uni: Wiley.