Concept

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Preferred Labelskos:prefLabel: DHT22
URI: https://w3id.org/ad4gd/air-quality/sensors/DHT22 ↗Go to the persistent identifier link
Within Vocab: AD4GD air quality sensors

None

Class

https://www.adafruit.com/product/385

The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed). It's fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old. Low cost Good for 0-100% humidity readings with 2-5% accuracy Good for -40 to 80°C temperature readings ±0.5°C accuracy No more than 0.5 Hz sampling rate (once every 2 seconds) From: https://www.adafruit.com/product/385

Sensor

type	Class Class
comment	Device, agent (including humans), or software (simulation) involved in, or implementing, a Procedure. Sensors respond to a stimulus, e.g., a change in the environment, or input data composed from the results of prior Observations, and generate a Result. Sensors can be hosted by Platforms.
is defined by	Sensor, Observation, Sample, and Actuator (SOSA) Ontology
definition	Device, agent (including humans), or software (simulation) involved in, or implementing, a Procedure. Sensors respond to a stimulus, e.g., a change in the environment, or input data composed from the results of prior Observations, and generate a Result. Sensors can be hosted by Platforms.
example	Accelerometers, gyroscopes, barometers, magnetometers, and so forth are Sensors that are typically mounted on a modern smart phone (which acts as Platform). Other examples of sensors include the human eyes.

valid

has unit	degree Celsius
has broader	Air Temperature

has unit	Percent Relative Humidity
has broader	Relative Humidity

various