Humidity Sensor HSHCA Series

Features of Alps Alpine Humidity Sensors

1. Industry-smallest (According to the manufacturer as of December 2019)
Alps Alpine has realized the industry’s smallest humidity sensors using its own semiconductor processes.
2. High Linearity
Stable output voltage even in high / low humidity compared to products from other companies
3. Wide range detection
Detects relative humidity from 0 to 100% RH with the capacitance change type detection method
4. Various applications
Used in many applications such as mobile, games, healthcare and home appliances

Humidity Sensor HSHCA Series Lineup

Product number HSHCAA006A HSHCAL001B HSHCAA120BNew Products HSHCAA114A HSHCAL101B
Size 2.5 × 2.2 × 1mm 2 × 2 × 0.88mm 30 × 13mm 30 × 13mm 24 × 16mm
Output Analog Degital(I2C) Analog Analog Degital(I2C)
Humidity range 0 ~ 100%RH 0 ~ 100%RH 20 ~ 95%RH 0 ~ 100%RH 0 ~ 100%RH
Accuracy ±5%RH ±1.5%RH(25℃, 50%RH) ±5%RH(25℃, 50%RH) ±5%RH(25℃, 50%RH) ±5%RH(25℃, 50%RH)
Operating temprature -10℃ ~ +85℃ -20℃ ~ +85℃ -20℃ ~ +60℃ -20℃ ~ +60℃ -20℃ ~ +85℃
Power-supply voltage 2.2 ~ 3.6V 1.8V ±5% 4.95 ~ 5.05V 4.75 ~ 5.25V 2.5 ~ 5.5V
Thermistor resistance 10 ±5%kΩ 10 ±3%kΩ
Humidity measurement function
Moisture-proof coating
Others A recommended alternative to the HSHCAA106E. Strong lock type connector
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What is Humidity?

Humidity is the amount, or percentage, of water vapor present in the air and usually refers to relative humidity. Another measure is absolute humidity.

Relative humidity (%RH): Amount of water vapor in the air at a given temperature ÷Amount of water vapor needed for saturation at that temperature
Absolute humidity (kg/kg): Mass of water vapor ÷ Mass of dry air

Alps Alpine’s humidity sensors measure relative humidity.
The difference between relative humidity and absolute humidity is for example, as air contracts or expands with a change in temperature, relative humidity changes but absolute humidity does not because the water vapor content is the same.

Humidity Sensing Methods

Humidity sensors measure humidity in a variety of ways. Alps Alpine’s humidity sensors are electrical and use change in capacitance.

Principles of Alps Alpine Humidity Sensors

Capacitive humidity sensors like Alps Alpine’s consist of two electrodes separated by a dielectric material (forming a capacitor). Humidity is measured by applying AC voltage between the electrodes and ascertaining the change in capacitance between the electrodes resulting from a change in permittivity (dielectric constant) of the dielectric material due to absorption of moisture.
By contrast, resistive humidity sensors use the change in conductivity of the dielectric material resulting from absorption of moisture.

A built-in IC converts capacitance values (C) obtained via the sensor into voltage (V).

Features of Alps Alpine Humidity Sensors

Industry-smallest(According to the manufacturer as of December 2019)

Developing and manufacturing in-house, Alps Alpine has realized the industry’s smallest humidity sensors using its own semiconductor processes to form thin-film capacitors like the above on silicon wafers.

High Linearity

Compared to other types of humidity sensor, Alps Alpine’s humidity sensors deliver high linearity of output.

Variety of Appications

Used not only to measure the humidity value of air conditioning equipment such as refrigerators, but also to detect the ingress of moisture for items such as the paper feed for printers and water intrusion detection of waterproof devices.

  • Wearable Devices

  • Smart Phone/ Tablets

  • Printer

  • Refrigerators

  • Air Conditioner

  • Humidifier