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

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Humidity Sensor HSHCA Series Lineup

Product number	HSHCAA006A	HSHCAL001B	HSHCAA120BNew Products	HSHCAA114A	HSHCAL101B
Product pictures
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	–	〇	〇	〇	〇
Moisture-proof coating	–	–	–	〇	〇
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.

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.

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  Wearable Devices

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  Smart Phone/ Tablets

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  Printer

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  Refrigerators

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  Air Conditioner

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  Humidifier