1. Description

    The WHT 20 temperature and humidity sensor is embedded with a dual-row flat leadless SMD package suitable for reflow soldering. The temperature and humidity signals can be read out on different pins. The bottom surface is 3.0×3.0 mm and the height is 1.05 mm.

    The sensor outputs a calibrated digital signal in standard I2C format. The WHT 20 series temperature and humidity sensor uses the transistor Vbe temperature characteristic to achieve high-precision temperature detection and the dielectric constant change after the medium absorbs moisture to achieve environmental humidity detection. It is a single-chip solution combined with the latest integrated circuit signal processing technology. It has the advantages of small size, low power consumption, high reliability and good compatibility.

2. Technical specifications of relative humidity

3. Technical specifications of temperature

4.Suggested working environment

  The recommended temperature and humidity range of this sensor is 5~60℃ and 20~80% RH. Long-term exposure in the non-recommended range, such as high humidity, may cause temporary signal drift (for example, >80%RH, drift +3% RH after 60 hours). After returning to the recommended range environment, the sensor will gradually return to the calibration state. Long-term exposure to the non-recommended range may accelerate the aging of the product.

5.RH accuracy at different temperatures 

  The following shows the maximum humidity error for other temperature ranges.

6.Electrical specifications

7.Important notice 

Warning, Personal Injury 

  Do not apply this product to safety protection devices or emergency stop equipment, and any other applications that may cause personal injury due to the product's failure. Do not use this product unless there is a special purpose or use authorization. Refer to the product data sheet and application guide before installing, handling, using or maintaining the product. Failure to follow this recommendation may result in death and serious personal injury. 

ESD Protection 

  Due to the inherent design of the component, it is sensitive to static electricity. In order to prevent the damage caused by static electricity or reduce the performance of the product, please take necessary anti-static measures when using this product. 

Quality Assurance 

The company provides a 12-month (1 year) quality guarantee (calculated from the date of shipment) to direct purchasers of its products, based on the technical specifications in the product data manual published by Winsen. If the product is proved to be defective during the warranty period, the company will provide free repair or replacement. Users need to satisfy the following conditions: 1. Notify our company in writing within 14 days after the defect is found. 2. The defect of this product will help to find out the deficiency in design, material and technology of our product. 3. The product should be sent back to our company at the buyer’s expense. 4. The product should be within the warranty period.