SF2 Filter Cap Datasheet by Sensirion AG

SENSIRION was 59:50:: COMPANY of ne in ct Parameter Value Operating Range ~40 125°C IP‘ IP67 RoHS Compliant Body material Body Color UL94 (Body material only) Filter material Filter Color Filter Thickness Filter pore size Filtration efficiency 1 Oleophobic Rating (Filter)3 Mullen Hydrostatic Polybutylene Terephthalate Black UL94 v-o (0.73mm) PTFE with polyester scrim Black 0.13 mm 1.5 pm 99.99% 8 >100mbar (>1 in water) httg://en.wikigediaorg/wiki/i F67
www.sensirion.com Version 3 December 2020 1/5
Datasheet Filter Cap SF2
For Humidity and Temperature Sensor SHT2x
Protection against dust and particles
Protection against water immersion
Designed to match on SHT2x DFN type sensors
Optimized for response time of sensor
Dimensions
Figure 1: Drawing of the filter cap SF2 (body only). Dimensions
are given in mm (1mm = 0.039inch), tolerances are ±0.1mm.
Add 0.15 to total height due to the filter membrane. The cavity
inside the cap fits to SHT2x sensors. Additional space for solder
joints are left open around the sensor.
Technical Specifications
Parameter
Value
Operating Range
-40 125°C
IP1
IP67
RoHS
Compliant
Body material
Polybutylene Terephthalate
(PBT)
Body Color
Black
UL94 (Body material only)
UL94 V-0 (0.73mm)
Filter material
PTFE with polyester scrim
Filter Color
Black
Filter Thickness
0.13 mm
Filter pore size
1.5 μm
Filtration efficiency 2
99.99%
Oleophobic Rating (Filter)3
8
Mullen Hydrostatic
>100mbar (>1m water)
1
IP67: dust tight, protected against harmful water immersion up
to 1m water column. (http://en.wikipedia.org/wiki/IP67) .
To achieve IP67 at the connections between the housing or
the PCB and the SF2 is up to the customer.
2
0.1µm particles at 0.05m/s air flow.
3
Repellence of oil and hydrocarbons according to
AATCC 118-1992 standard. Rating goes from 0 8 while 8 is
most repellent.
A-A
1.2
0.5
1.4
1.9
1.5
Ø 3.0
Ø 5.05
3.4
SHT21
0.65
0.95
R0.5
0.2
A
A
R3.2
4.0
3.4
1.0
6.0
Product Summary
The filter cap SF2 protects SHT2x humidity and
temperature sensors against dust, water immersion as
well as against contamination by particles. The cavity
inside is made such that the volume between membrane
and sensor is kept minimal and hence the impact on
response time for humidity measurements is reduced to a
minimum. The filter cap SF2 is available in black color
with a black filter membrane.
The filter cap SF2 is made of a single piece of
Polybutylene Terephthalate (PBT) with a filter membrane
welded on it. The SF2 filter cap is designed to be mounted
after soldering by clipping the four pins into openings in
the PCB. Together with the sensor it provides a compact
entity which may serve as an adaptor to the device
housing. Adding adhesive for seal to PCB and using an o-
ring it serves for a waterproof mounting solution.
SENSIRION THE senson (DMFANY
Datasheet Filter Cap SF2
www.sensirion.com Version 3 December 2020 2/5
User’s Guide Filter Cap SF2
Mounting Instruction
The filter cap SF2 is mounted to the PCB after soldering
the SHT2x sensor by clipping the four pins into the
openings in the PCB. The filter cap may be fixed by
adhesive or by the force of the pins itself compare
Figure 2. By choosing different distances between the
openings the SF2 either clips itself on the PCB by
mechanical force or the pins can be used for positioning
only compare Figure 3. The recommended PCB
thickness for mounting with clips is 0.8mm. Please note
that when mounting the filter cap with clips, a hermetic
seal between filter cap and PCB cannot be guaranteed.
This should be considered for applications in which the
filter cap is used to seal the volume around the sensor
against surrounding volume which is enclosed by a
housing (compare Figure 2). In addition, the membrane or
any part of the SF2 must be protected from external forces
or contact, so that no mechanical stress is put on the SF2,
which could result in shifting or breaking. This could be
realized in a design as in Figure 2, where the membrane is
protected behind the housing, i.e. no part of the SF2 is
exposed or sticks out of the housing. For further
information on handling and assembly of SF2 filter caps
please refer to the application Note “Handling and
Assembly of SF2 Filter Cap”.
Figure 2: Side view of SF2 filter cap mounted between PCB and
housing wall. The volume below membrane is kept minimal and
the is separated from surrounding volume enclosed by housing.
Measures for higher protection
For hermetic seal, adhesive must be added between filter
cap and PCB. Such seal provides higher security against
water leakage, condensation inside the housing, and
corrosion of the soldering pads of the sensor. If corrosion
of the solder contacts is a potential problem, it is
recommended to cover the solder joints with adhesive as
well. For further information on application of adhesives
with SF2 filter caps, please refer to the application Note
“Handling and Assembly of SF2 Filter Cap”.
Figure 3: PCB layout of SHT2x and filter cap SF2. Dimensions
are given in mm (1mm = 0.039 inch). The distance of the
openings is 5.1mm ±0.05mm if the sensor should clip on the
PCB and 5.28mm if the pins are used for adjustment only. By
varying the openings distance about ±0.05mm the clipping force
may be adjusted.
Mounting against housing wall
The filter cap SF2 not only protects against dust and water
immersion, it also helps to mount the sensor to the
housing wall. If mounted to a housing wall towards the
outside, the sensor is perfectly exposed to the
environment of which humidity and temperature shall be
measured.
In order to protect the inside of the device housing against
water immersion it is recommended to place an o-ring
between filter cap and housing wall compare Figure 2.
For such o-rings Sensirion recommends the following
specifications:
Inner diameter: 5mm
Cross section: 1mm
Material: NBR
Important: Please ensure that the air path to the measured
volume is not blocked by another membrane. This may
increase response time of the sensor dramatically.
SHT2X
PCB
housing
o-ring
membrane
SF2
1.0
1.0
2.4
0.3
0.4
1.
6
0.4
0.7
0.2
5.1 (5.28)
5.1 (5.28)
1.0
filter cap
Sensor
SENSIRION YHE sensor: COMPANY SENSIRION THE SENSOR COMPANY
Datasheet Filter Cap SF2
www.sensirion.com Version 3 December 2020 3/5
Labeling of the shipment
Each shipment is labeled with product and tracking
information compare Figure 4.
Figure 4: Label on shipment packaging: Customer P/N refers to
the Sensirion product number, Lot No. refers to suppliers
tracking information. Production Date is given as MM = month,
DD = day, YYYY = year.
Shipping Package
The SF2 are provided in trays of 100 pieces per tray.
Part Description: Filter Cap SF2
Customer P/N: 1-100726-01
Quantity: 100 Pcs
Lot No.: WXXXXXXX
Production Date: MM/DD/YYYY
SENSIRION rue sensor: COMPANY Date Version Page(s) Changes Augusi 2010 1.0 i — 3 Changed front picture, compleied technical spec. and labeling (DBO) December 2011 2 2 More detaiied informaiion lo mounting offliier cap‘ reference to appiicaiion note. September2020 3 2, 5 Modified mouniing instructions to ensure protection from mechanical siress
Datasheet Filter Cap SF2
www.sensirion.com Version 3 December 2020 4/5
Revision History
Date
Version
Page(s)
Changes
August 2010
1.0
1 3
Changed front picture, completed technical spec. and labeling (DBO)
December 2011
2
2
More detailed information to mounting of filter cap, reference to application note.
September 2020
3
2, 5
Modified mounting instructions to ensure protection from mechanical stress.
Updated important notices.
Important Notices Sensirion AG info@sensmon.com www.sensxrion.com Sensirion Taiwan Co. Ltd info@sensmon.com www.sensxrion.com Sensirion Inc., USA infa-us@sensiricn.ccm Sensirion Japan Co. Ltd. phone +81 3 3444 49 infa-‘g_@sensirion com www.sensirion com/'g SENSIRION nus sense»: (DMFANY Sensirion Korea Co. Ltd. info-kr@sensxricn.com www sensmon.comlkr Sensirion China Co. Ltd. phone: +86 755 82521 info-cn@sensirion .com www sensmon.comlcn www.5ensirion com/distnbutors
Datasheet Filter Cap SF2
www.sensirion.com Version 3 December 2020 5/5
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 or serious 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 all claims, costs, damages and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such
unintended or unauthorized use, 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 ESD precautions when handling this product.
See application note “ESD, Latchup and EMC” for more information.
Warranty
SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this
product shall be of the quality, material and workmanship defined in SENSIRION’s published specifications of the product. Within such
period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION’s discretion, free of charge to the
Buyer, provided that:
notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance;
such defects shall be found, to SENSIRION’s reasonable satisfaction, 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 product shall be limited to the unexpired portion of the original period.
This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by
SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN,
SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL
WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED.
SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the data sheet and proper use
of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or
stored not in accordance with the technical specifications.
SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and
all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation
recommended parameters, must be validated for each customer’s applications by customer’s technical experts. Recommended
parameters can and do vary in different applications.
SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and
(ii) to improve reliability, functions and design of this product.
Copyright © 2020, by SENSIRION. CMOSens® is a trademark of Sensirion. All rights reserved
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info@sensirion.com
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phone: +1 312 690 5858
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Sensirion Korea Co. Ltd.
phone: +82 31 337 7700~3
info-kr@sensirion.com
www.sensirion.com/kr
Sensirion Japan Co. Ltd.
phone: +81 3 3444 4940
info-jp@sensirion.com
www.sensirion.com/jp
Sensirion China Co. Ltd.
phone: +86 755 8252 1501
info-cn@sensirion.com
www.sensirion.com/cn
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phone: +886 3 5506701
info@sensirion.com
www.sensirion.com
To find your local representative, please visit www.sensirion.com/distributors