Capacitive digital temperature and humidity sensor on PCB mount

December 06, 2016 // By Graham Prophet
Alps Electric has added the “HSHCAL101B” PC board module to its HSHCAL series lineup of capacitive digital temperature and humidity sensors for major home appliances.

Air purifiers, refrigerators, air-conditioning systems and other major home appliances are increasingly equipped with functions for sensing a wide range of environmental parameters, such as temperature, humidity, air pressure and ambient light, to enhancing comfort and convenience for users and improving the energy-saving performance of the equipment.

Sensors used in these appliances in the past have predominantly provided analogue output, but there has been a rising need in recent years for integration of sensors with digital output. Sensors must also be installed in an optimal location inside the appliance to be able to perform more accurate measurement. In many cases, that is away from the main circuit board and the sensor should be mounted to a separate PC board.

Alps Electric has responded to the market by newly developing the HSHCAL101B, a module consisting of an HSHCAL Series Capacitive Digital Temperature & Humidity Sensor mounted to a PC board. As well as being easy to install in a position enabling accurate measurement of temperature and humidity, as was the challenge, the product helps to reduce the manufacturing workload by eliminating the step of preparing a separate board.

Ensuring reliability, the sensor part of the module employs a cover structure for protection from dust, dirt and other foreign matter, and the component terminal is covered in moisture-proof film. In addition, I²C interface support and a built-in connector allow easy wiring to the main board.

The HSHCAL series capacitive digital temperature & humidity sensor makes use of Alps Electric’s original MEMS process technology to realize an industry-leading compact size and low profile. It works in 100% relative humidity (dew point) and achieves high temperature sensing precision of ±5%.

www.alps.com