Comparison of TRH series sensors
We offer growing variety of USB temperature and relative humidity sensors. Learn about the options and find the perfect one for your application.
Product table
| Product | Operating range | T° Accuracy (at 25°C, typical) |
%RH Accuracy (at 25°C, typical) |
Sensor enclosure | Cable type | Particle filter |
|---|---|---|---|---|---|---|
| TRH450 | -40°C to 125°C | ±0.1°C | ±1.5 %RH | Aluminium | Silicon | Yes |
| TRH420 | -40°C to 70°C | ±0.1°C | ±1.5 %RH | PET mesh | PVC | Yes |
| TRH320 | -40°C to 70°C | ±0.3°C | ±2.0 %RH | PET mesh | PVC | Yes |
| TRH200 | -40°C to 70°C | ±0.3°C | ±2.0 %RH | None | PVC | No |
Note: The above is a summary meant to highlight key differences. Please refer to individual product pages and datasheet for complete specifications.
Particle filter
Some models include a thin PTFE membrane that blocks more than 99.99% of particles over 200nm. This is recommended for harsh environments where extra protection against dust, soot and other contaminants is a requirement.
Enclosure types
The enclosure is what covers the digital sensor probe.
| Picture | Enclosure type | Pros | Cons |
|---|---|---|---|
 |
Aluminium | Excellent physical protection, extended temperature | Slower response time, higher cost |
 |
PET Mesh | Good protection, low cost | Slightly slower response time |
 |
None | Minimal response time, low cost | The digital sensing element is exposed. |
Cable type
Most models use standard PVC cables, but high temperature range models use Silicon cables.
- PVC: Low cost standard cable type, medium temperature range. Not suitable for extreme temperatures. Can crack if flexed at low temperature.
- Silicon: High temperature resistance, stays flexible even at low temperatures.
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