SHT35 datasheet(2/20 Pages) ETC2

2 / 20 page

Datasheet SHT3x-DIS

www.sensirion.com

August 2016 - Version 3

2/20

1 Sensor Performance

Humidity Sensor Specification

Parameter

Condition

Value

Units

SHT30 Accuracy tolerance1

Typ.

3

% RH

Max.

Figure 2

SHT31 Accuracy tolerance1

Typ.

2

% RH

Max.

Figure 3

SHT35 Accuracy tolerance1

Typ.

±1.5

% RH

Max.

Figure 4

Repeatability2

Low

0.25

% RH

Medium

0.15

% RH

High

0.10

% RH

Resolution

Typ.

0.01

% RH

Hysteresis

at 25°C

0.8

% RH

Specified range3

extended4

0 to 100

% RH

Response time5

63%

Long-term drift

Typ.7

<0.25

% RH/yr

Table 1 Humidity sensor specification.

Temperature Sensor Specification

Parameter

Condition

Value

Units

SHT30 Accuracy tolerance1

typ., 0°C to 65°C

0.3

°C

SHT31 Accuracy tolerance1

typ., -40°C to 90°C

0.3

°C

SHT35 Accuracy tolerance1

typ., -40°C to 90°C

±0.2

°C

Repeatability2

Low

0.24

°C

Medium

0.12

°C

High

0.06

°C

Resolution

Typ.

0.015

°C

Specified Range

-40 to 125

°C

Response time 8

63%

Long Term Drift

max

<0.03

°C/yr

Table 2 Temperature sensor specification.

1 For definition of ty pical and maximum accuracy tolerance, pleaserefer to the document “Sensirion Humidity Sensor Specification Statement”.

2 The stated repeatability is 3 times the standard deviation (3σ) of multiple consecutive measurements at the stated repeatability and at constant ambient conditions. It

is a measure for the noise on the phy sical sensor output. Different measurement modes allow for high/medium/low repeatability.

3 Specified range refers to the range for w hich the humidity or temperature sensor specification is guaranteed.

4 For details about recommended humidity and temperature operating range, please refer to section 1.1.

5 Time for achiev ing63% of a humidity step function, valid at 25°C and 1m/s airflow. Humidity response time in the application depends on the design-in of the sensor.

6 With activ ated ART function (seesection 4.7) the response time can be improved by a factor of 2.

7 Ty pical value for operation in normal RH/T operating range, see section 1.1. Maximum value is < 0.5 %RH/yr. Higher drift values might occur due to contaminant

env ironments with vaporized solvents, out-gassing tapes, adhesives, packagingmaterials, etc. For more details please refer to Handling Instructions.

8 Temperature response times strongly depend on the ty pe of heat ex change, the av ailable sensor surface and the design environment of the sensor in the final

application.

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