Humidity Sensor - HIH-4030 Breakout

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Humidity Sensor HIH4030 Breakout.jpg
  • Manufacturer: Honeywell + Sparkfun breakout
  • Voltage: + 5 Volts
  • Communication: Analog Out
  • Spec Sheet

This is a breakout board for Honeywell's HIH-4030 capacitive 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. The Sparkfun version comes as shown in the picture, with the surface-mounted HIH-4030 already soldered onto the breakout board. The pins of the 3-pin header are spaced by 0.1".

Per Table 2 of the datasheet, the relationship between output voltage and relative humidity is as follows (assuming a +5 V supply and 25 degree C temperature): <math>RH%=32.57V_{out}-31.21</math>

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 x 0.2" (19.05 x 7.62 x 5 mm)

Contents

Hooking it up

The breakout board is pretty explicit in labeling the three pins that need to be hooked up. There is a ground, analog output and +5 volts that can be soldered onto wires or a row of three male header pins. Of course, the analog output of the humidity sensor should be connected to the analog input of the microcontroller.

Code

Availability


This page is a Component on bildr. Components are pages about specific parts, and include connection details and code when available.

NOTE: All information contained within this article is pure opinion. Although this article is intended to help people, it may contain faulty or misleading information. This article is not to be considered professional opinion or advice, and is in no way a replacement for reading all safety/instructional documentation. Always remember to protect yourself when handling/using hazardous materials, as well as test new techniques before using them on projects/work intended to be handed in or used.

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