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Humidity Sensor - HIH-4030

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.

Availability: In Stock.

4635 £13.00
(£15.60 incl VAT)

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".


  • 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: 9.05 x 7.62 mm



Posted by Andy Taylor, Tuesday, 24 January 2012 on product Humidity Sensor - HIH-4030


The data sheet for this humidity sensor HIH-4030-001 states a minimum load of 80Kohms. It is not clear if minimum load is referring to current, in which case the resistor value should be less than 80K, or minimum resistance, the resistor should be no lower than 80K?


  • Posted by Geoff Hampson on Tuesday, 24 January 2012
    I?d agree that the datasheet isn?t that helpful. Since it states a minimum load, you need to provide a minimum load of 63uA (I = V / R = 5 / 80000) so an 80K resistor or a lower resistance to give a higher load. If you are trying to keep the current consumption low then you want to get as close to 80K as you can. If you?re running off a power supply then using a 10K or whatever you happen to have to hand should be fine.

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