Low Power Soil Moisture & Humidity Sensor I2C High Accuracy SHT21

Low Power Soil Moisture & Humidity Sensor I2C High Accuracy SHT21 Description

Soil Moisture Sensor Meter High Accuracy Low Consumption I2C Output Humidity Sensor(SHT21)
Features:



This soil temperature and humidity sensor is a digital output with a resolution of up to 14 bits.


Internal self-calibration, no calibration required. High reliability and long-term stability.


The combination of temperature and humidity is convenient for dew point measurement.


The product is compact in structure and I2C output, suitable for field application and product integration.


Because the brass structure can be used in high temperature and high humidity environment, the temperature resistance is higher than that of the plastic case.


The sensor is dustproof, anti-leaching, and adopts aviation joints. It can be directly replaced during maintenance, and no need to repeat wiring.


Suitable for computer room monitoring, HVAC, weather station, warehouse, construction site, concrete test block inspection, agricultural greenhouse, flower nursery, etc.



Specification:


Item Type:Soil Sensor


Working Current:<10mA

Temperature Measuring Range:-20~100

Humidity Measurement Range: 0~100%RH

Working Conditions: - 40 C ~ 125 C, 0 ~ 99% RH

Storage Conditions: - 20 C ~ 80 C, 0 ~ 95% RH

Line Length:150cm / 59.06in


Weight: 128g / 4.52 oz(Approx.)








FS200-SHT2X series(Optional)


Humidity accuracy %RH


Temperature accuracy C


Voltage V




SHT20


3


0.3


3.3




SHT21


2


0.3


3.3




SHT25


1.8


0.2


3.3






Package List:

1 x Sensor


1 x Wire Marker






Note:

Relative humidity of air is a function of temperature. Air temperature has a great influence on relative humidity. Various compounds such as acid and alkali salts have a significant impact on the physical properties of water vapour. The following items should be noted when using:

1. The temperature and humidity sensor should be installed in a place where the temperature is relatively stable and most representative of the measured ambient temperature and humidity.

2. Avoid installation in places where the temperature changes drastically.

3. Avoid installation in places where the air is flowing intensively.

4. Avoid installing dead corners where air does not flow. 

5. Avoid using it in a salt spray environment.

6. Avoid use in corrosive gas environments.



Working Condition:

The sensor has normal performance within the recommended operating range. Long-term exposure to conditions outside the normal range, especially at humidity >80%, may result in temporary signal drift (after 60 hours drift +3% RH). When returning to normal After the working conditions, the sensor will slowly return to the calibration state. Prolonged use under abnormal conditions will accelerate the aging of the product.

Humidity sensors are not ordinary electronic components and require careful protection. This must be taken seriously by users. Prolonged exposure to high concentrations of chemical vapour will cause the sensor reading to drift.