This is a breakout board for Honeywell’s HIH-4030 humidity sensor. The HIH-4030 measures relative humidity (%RH) and delivers it as an analog output voltage.

You can connect the output of the sensor directly to an ADC on a microcontroller; and, thanks to the sensor’s near linear voltage output, the data is very easy to process.

Voltage applied to the supply pins should be within 4-5.8VDC, and optimally at 5V. The sensor will typically only consume about 200μA.

This product comes as shown in the picture, with the HIH-4030 soldered onto the breakout board. The pins of the 3-pin header are spaced by 0.1".

Features:

• Near linear, analog output
• 4-5.8VDC voltage supply
• All pins broken out to a 0.1" pitch header
• Laser trimmed interchangeability
• Low power design, typical current draw of only 200μA
• Enhanced accuracy
• Fast response time
• Stable, low drift performance

Dimensions: 0.75 x 0.30 “ (19.05 x 7.62 mm)

Documents:

• Schematic
• Eagle Files
• Datasheet (HIH4030)
• Hygrometer Reconditioning Note
• Bildr Tutorial
• GitHub (Design Files)