Datasheet Membrane Option
For SHT3x Humidity and Temperature Sensors
 Protects the sensor from water and dust
according to IP67
 Allows for sensor use under harsh environmental
conditions
 Withstands multiple standard reflow cycles
 Lasts over total sensor life time Delivered in T&R Packaging
 On-package membrane protected by exclusive
license for several patents1
Product Summary
The SHT3x membrane is a PTFE foil, dedicated toprotect the sensor opening from water and dust
according to IP67. It will thus allow for sensor use underharsh environmental conditions, where spray water andhigh exposure to dust is challenging for accurate sensor
performance. The membrane cover is attached to thesensor package by a double faced adhesive tape, which

is designed to stay on the package over the wholesensor life time. Due to the minimum enclosed air
volume, the response time of the RH signal is the sameas the value achieved by the uncovered sensor.
Sensirion holds an exclusive license for several patents
for employing an on-package filter membrane on ahumidity sensor1.

Datasheet: Intention of Use
This datasheet is meant to provide all relevant
specifications for the additional membrane option of theRH&T-sensors of type SHT3x. All SHT3x products
coming with the membrane option are listed in Table 1,

together with their respective order number. Any further
information
about
sensorperformance,communication protocols etc. are to be found in therespective main datasheets, only.

1

document SHTxx handling instructions also apply tosensors with the membrane option.

General information

The SHT3x membrane is an optional PTFE foil, directly
attached to the top surface of the sensor. It is attachedto the sensor via a double faced adhesive tape, designed
to last over the whole sensor life time. The membranecompletely covers the sensor opening and thus acts asa reliable shield against pollution from spray water anddust, classified IP67. The whole package withstands
multiple reflow cycles.
Although the membrane provides water and dust
protection according to IP67, it does not in generalprevent from contamination with volatile chemicals.
Detailed handling and storage instructions in the2Specifications of the Membrane

The PTFE membrane has a thickness of 100µm, offering
a filtration efficiency of >99.99% for particles of 200nm
size. It is attached to the DFN package via a Polyester(PET) film supported double coated silicone adhesive
tape with a nominal thickness of 100µm. The PET film
has a hole in the middle to allow free air exchange
between the environment and the sensor opening.
Due to the small dead volume between sensor surface
and membrane layer and the high permeability of themembrane, the response time of the RH sensor stays
within the specification of the sensor without membrane.

1 EP 1810013 B1; US 7,741,950; CN 101040181 B

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Datasheet Membrane Option

3Technical Drawing

2.2

2.5

0.2

0.2

2.2

0.9

2.5Figure 1 Dimensional drawing of SHT3x membrane sensor
package. Pin 1 is indicated through the cut corner of themembrane.

4Shipping Package
Ø1.5 +.1 /-0.0
4.00
2.00 ±.05 SEE Note 20.30 ±.05

Ø1.00 MIN
1.75 ±.1

4.00 SEE Note 1A

5.50 ±.05
SEE NOTE 2

R 0.2 MAX.
B0B

12.0 +0.3/-0.1AR 0.25 TYP.

K0A0SECTION A - A

A0 = 2.75
B0 = 2.75
K0 = 1.20
TOLERANCES - UNLESSNOTED 1PL ±.2 2PL ±.10

NOTES:
1. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ±0.2
2. POCKET POSITION RELATIVE TO SPROCKET HOLE MEASUREDAS TRUE POSITION OF POCKET, NOT POCKET HOLE
3. A0 AND B0 ARE CALCULATED ON A PLANE AT A DISTANCE "R"ABOVE THE BOTTOM OF THE POCKETDETAIL B

Figure 2 Technical drawing of the packaging tape with sensor orientation in tape. Header tape is to the right and trailer tape to theleft on this drawing. Dimensions are given in millimeters.

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5Quality

5.1

Material Contents

The device is fully RoHS and WEEE compliant, e.g. freeof Pb, Cd, and Hg.

6Ordering Information

Different SHT3x output versions can be ordered in tapeand reel packaging as given in Table 1. The reels aredelivered in sealed antistatic ESD bags.

NameQuantity

Order Number

SHT30-DIS-F2.5kS
SHT30-DIS-F10kS
SHT31-DIS-F2.5kS
SHT31-DIS-F10kS
SHT35-DIS-F2.5kS
SHT35-DIS-F10kS

2500
10000
2500
10000
2500
10000

1-101466-01
1-101454-01
1-101462-01
1-101463-01
1-101465-01
1-101469-01

Table 1 SHT3x membrane ordering options.

Revision History
DateFebruary 2016
October 2016

Version0.1
1Page(s)allJanuary 2017
August 2019

23

2
1

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Changes
Initial release
Updated membrane dimensions
Membrane specifications introduced
Updated shipping package
Included “Protected by exclusive license for several patents”

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Datasheet Membrane Option

Important Notices
Warning, Personal Injury
Do not use this product as safety or emergency stop devices
or in any other application where failure of the product could
result in personal injury. Do not use this product for
applications other than its intended and authorized use.
Before installing, handling, using or servicing this product,
please consult the data sheet and application notes. Failure
to comply with these instructions could result in death orserious injury.
If the Buyer shall purchase or use SENSIRION products for any
unintended or unauthorized application, Buyer shall defend,
indemnify and hold harmless SENSIRION and its officers,
employees, subsidiaries, affiliates and distributors against allclaims, costs, damages and expenses, and reasonable attorneyfees arising out of, directly or indirectly, any claim of personal
injury or death associated with such unintended or unauthorizeduse, even if SENSIRION shall be allegedly negligent with respect
to the design or the manufacture of the product.
ESD Precautions
The inherent design of this component causes it to be sensitive
to electrostatic discharge (ESD). To prevent ESD-induced
damage and/or degradation, take customary and statutory ESDprecautions when handling this product.
See application note “ESD, Latchup and EMC” for moreinformation.
Warranty
SENSIRION warrants solely to the original purchaser of thisproduct for a period of 12 months (one year) from the date ofdelivery that this product shall be of the quality, material andworkmanship defined in SENSIRION’s published specificationsof the product. Within such period, if proven to be defective,
SENSIRION shall repair and/or replace this product, inSENSIRION’s discretion, free of charge to the Buyer, provided
that:notice in writing describing the defects shall be given toSENSIRION within fourteen (14) days after theirappearance;such defects shall be found, to SENSIRION’s reasonablesatisfaction, to have arisen from SENSIRION’s faulty
design, material, or workmanship;the defective product shall be returned to SENSIRION’s
factory at the Buyer’s expense; and
the warranty period for any repaired or replaced productshall be limited to the unexpired portion of the originalperiod.
This warranty does not apply to any equipment which has notbeen installed and used within the specifications recommendedby SENSIRION for the intended and proper use of theequipment. EXCEPT FOR THE WARRANTIES EXPRESSLYSET FORTH HEREIN, SENSIRION MAKES NO WARRANTIES,EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE
PRODUCT. ANY AND ALL WARRANTIES, INCLUDINGWITHOUT
LIMITATION,WARRANTIESOFMERCHANTABILITY OR FITNESS FOR A PARTICULARPURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED.
SENSIRION is only liable for defects of this product arising underthe conditions of operation provided for in the data sheet andproper use of the goods. SENSIRION explicitly disclaims allwarranties, express or implied, for any period during which thegoods are operated or stored not in accordance with the technicalspecifications.
SENSIRION does not assume any liability arising out of any
application or use of any product or circuit and specificallydisclaims any and all liability, including without limitationconsequential or incidental damages. All operating parameters,including without limitation recommended parameters, must bevalidated for each customer’s applications by customer’stechnical experts. Recommended parameters can and do vary in
different applications.
SENSIRION reserves the right, without further notice, (i) tochange the product specifications and/or the information in thisdocument and (ii) to improve reliability, functions and design ofthis product.
Copyright © 2019, by SENSIRION.
CMOSens® is a trademark of Sensirion
All rights reserved

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