HTU21P View Datasheet(PDF) - Unspecified

Part Name

Description

MFG CO.

HTU21P

Digital Relative Humidity sensor with Temperature output

Unspecified 

HTU21D(F) Sensor

Digital Relative Humidity sensor with Temperature output

GRAPH 1 : RELATIVE HUMIDITY ERROR BUDGET CONDITIONS AT 25°C

10

9

8

7

6

5

4

3

2

1

0

0

Maximal Tolerance

Typical Tolerance

10 20 30 40 50 60 70 80 90 100

Relative Humidity (%RH)

 HTU21D(F) sensors are specified for optimum accuracy measurements within 5 to 95%RH.

 Operation out of this range (< 5% or > 95% RH, including condensation) is however possible.

TEMPERATURE COEFFICIENT COMPENSATION EQUATION

Using the following temperature coefficient compensation equation will guarantee Relative Humidity accuracy given p.3, from

0°C to 80°C:

RH compensatedT  RH actualT  (25  Tactual)  CoeffTemp

RHactualT

Tactual

CoeffTemp

Ambient humidity in %RH, computed from HTU21D(F) sensor

Humidity cell temperature in °C, computed from HTU21D(F) sensor

Temperature coefficient of the HTU21D(F) in %RH/°C

HPC199_3 HTU21D(F) Sensor Datasheet

www.meas-spec.com

4/21

October 2013

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