Specification Brand : HiLetgo BulletPoint : 2PCS XH-M214 12V Soil Humidity Sensor Humidity Controller with Digital Display Auto Water Supply System Module BulletPoint1 : SHT21 HTU21 Digital Humidity Temperature Sensor BulletPoint2 : Energy consumption: 80 uW (at 12 bit, 3V, 1 measurement/s) BulletPoint3 : Relative Humidity operating range: 0-100% RH BulletPoint4 : Relative Humidity resolution of 0.03% BulletPoint5 : Relative Humidity Response Time of 8 sec (tau 63%) BulletPoint6 : Finger marks can be removed with methylated spirits if necessary CareInstructions : Hand Wash Only Color : Blue ExternallyAssignedProductIdentifier : 5693439500552 ExternallyAssignedProductIdentifier1 : 794419347121 ExternallyAssignedProductIdentifier2 : 0794419347121 ExternallyAssignedProductIdentifier3 : 00840163308977 ItemName : HiLetgo SHT21 HTU21 Digital Humidity Temperature Sensor Module Replace SHT11 SHT15 ItemPackageDimensions_Height : 2.54 centimeters ItemPackageDimensions_Length : 0.762 centimeters ItemPackageDimensions_Width : 2.54 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : humidifier-accessories ItemTypeName : Enamel Lampshade Mesh Guard Manufacturer : HiLetgo Material : Tin ModelName : Enamel Lampshade Mesh Guard ModelNumber : 3-01-1169 MountingType : Tabletop NumberOfItems : 1 NumberOfPieces : 1 OperatingHumidity : 0-99% PackageLevel : unit PartNumber : 3-01-1169 ProductDescription : Description: The Humidity and Temperature Sensor is an Arduino-compatible sensor board that carries an SHT21 digital humidity and temperature sensor from Sensirion. It has a 4-pin interface that can communicate directly with the analog pins on the Arduino. The SHT21 utilizes a capacitive sensor element to measure humidity, while the temperature is measured by a band gap sensor. Both sensors are seamlessly coupled to a 14-bit ADC, which then transmits digital data to the Arduino over the I2C protocol. Because of the sensor¡¯s tiny size, it has incredibly low power consumption, making it suited for virtually any application. Specifications: * Energy consumption: 80 uW (at 12 bit, 3V, 1 measurement/s) * Relative Humidity operating range: 0-100% RH * Relative Humidity resolution of 0.03% * Relative Humidity Response Time of 8 sec (tau 63%) * Temperature operating range: -40 to +125¡æ * Temperature resolution of 0.01 C * 4 pins: +5V, GND, Clock (SCL), Data (SDA) * Bidirectional communication over a single pin on I2C protocol * Board is 5V tolerant, allowing sensor to run from a 5V supply on Arduino I/O pins Applications * Homes, basements and HVAC systems for measuring humidity * People with physical conditions sensitive to humidity * Home ventilating, heating and air conditioning systems * Meteorology stations to predict or check weather temperatures * Gardens or greenhouses to check humidity and temperatures