Thermohygrometers are the most common type of humidity sensor and you’ll find them in handheld units and transmitters. They commonly display temperature and humidity simultaneously and have a response rate of about four seconds. Their sensors read resistance or capacitance. Typical applications include:
- Breweries and fermentation
- Environmental research
- Food ripening and storage
- HVAC
- Pharmaceutical incubators
- Pharmaceutical tablet coating
- Plant growth chambers
With features that can include large, back-lit displays, calculation of dew point, min/max, data hold, data logging, infrared temperature measurements, RS232 output, printing capabilities, and more, thermohygrometers can be handy instruments. Why focus your search on a thermohygrometer? Here is an overview of the pluses and minuses of these instruments:
Advantages to Using a Thermohygrometer
- Low cost
- Quick sensor response time
- Repeatability at ambient RH values
- Portability
Drawbacks to Using a Thermohygrometer
- Susceptibility to losing calibration
- Level of accuracy is medium or moderate
- Probes are not interchangeable
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