Advantages of the Series
The TRH series allows for precise temperature and relative humidity measurement in a single instrument. In addition to these real data, using DracalView or dracal-usb-get, you will immediately access the following calculated data: dew point, humidex, and more!
The Dracal ecosystem allows for harmonized data, no matter how many instruments are connected to your system. If you prefer data integration without going through third-party software (VCP mode), know that your temperature and relative humidity data will also be harmonized.
Instruments Available in This Series
| Name |
Temperature (accuracy at 25°C) |
Humidity (typical accuracy at 25°C) |
Sensor Protection | Sensor Cable | Technical Information |
| TRH450 | -40°C to 125 °C ± 0.1°C | 0 %RH to 100 %RH ±1.5 %RH |
PET mesh Anodized aluminum |
Silicone | Datasheet |
| TRH420 | -40°C to 70 °C ± 0.1°C | 0 %RH to 100 %RH ±1.5 %RH | PET mesh | PVC | Datasheet |
| TRH320 | -40°C to 70 °C ± 0.3°C | 0 %RH to 100 %RH ±2.0 %RH | PET mesh | PVC | Datasheet |
| TRH200 | -40°C to 70 °C ± 0.3°C | 0 %RH to 100 %RH ±2.0 %RH | None | PVC | Datasheet |
Sensor Protection
The protection covers the sensor of the digital sensor.
| Photo | Type of Protection | Advantages | Disadvantages |
 |
Aluminum | Excellent physical protection, extended temperature range | Slower response time, higher cost |
 |
PET mesh | Good protection, low cost | Slightly slower response time |
 |
None | Increased response speed | Must be protected from contaminants and splashes |
Sensor Cable
| Photo | Material | Advantages | Disadvantages |
 |
PVC | Standard low-cost cable type, medium temperature range. | Inadequate for extreme temperatures. It may crack if bent at low temperatures. |
 |
Silicone | Resists high temperatures and remains flexible even at low temperatures. | Higher cost. |
Particle Filter
The TRH320, TRH420, and TRH450 have a particle filter blocking more than 99.99% of particles over 200 nm, protecting the sensor from dust, soot, and other contaminants.
Examples of Use for Each Instrument
| Name | Image | Advantages | Application Examples |
| TRH450 |  |
High-temperature resistance + High accuracy | Case study with Lumotive |
| TRH420 |  |
High accuracy | Usage scenario reference instrument in a climate chamber |
| TRH320 |  |
Precision thermometer and hygrometer | Case study with TetraScience |
| TRH200 |  |
Exposed sensor to measure hard contact surfaces |
User Manual and FAQ
1- Can the probes go into the water?
No, the TRH probes are not waterproof. These USB instruments measure air components.
2- The cable and housing temperature range is 0°C to 70°C. Can I use the instrument within the probe's operating range?
Yes, but be sure to put only the probe in more extreme temperatures.
Need More Information?
We would be happy to help! Do not hesitate to contact us for any questions or concerns.