Product FAQ

The time that a sensor is measuring a given physical quantity

Please refer to testing conditions and time under information on testing in specifications for each sensor.

I²C. Only pressure sensors also support SPI.

Our lineup includes products which have had a moisture-proof coating applied in order to protect the circuit when used to measure temperature or humidity in humid conditions or environments where condensation may form. However, this is not a waterproof or drip-proof coating and does not guarantee that the product will work in water. Products are guaranteed against being wet by fresh water.

Using capacitance. Our humidity sensors use the change in capacitance caused by variations in humidity.

Absolute humidity is the amount of water vapor present in one cubic meter, measured in grams per cubic meter (g/m³). Relative humidity is the ratio of the actual amount of water vapor to the amount of water vapor at saturation at a given pressure and temperature, expressed as a percentage.

The conversion of capacitance (C) into voltage (V)

After reflow soldering, humidity sensor output will be offset due to the humidity-sensing part becoming dry. Rehydration is the process of correcting this offset.

A 1.2m 22 AWG wire has been used before with a supplied product. In testing, modules were found to work using 28 AWG wire of up to 2m.

HSHCAA Series modules have a hole in the board for affixing with a screw.
HSHCAL Series modules should be affixed by inserting the board into a slit.

Our humidity sensors are not intended for use in the soil.

Response times for the HSHCAL Series for a change from 30% to 90% relative humidity at 25°C are 63%RH in 30s, 80%RH in 120s, and 90%RH in 480s.