SF1-100 - SENSIRION - Product.Network

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Version 2.0 – January 2009 1/3

Datasheet Filter Cap SF1

For Humidity and Temperature Sensor

• Protection against dust and particles

• Protection against water immersion

• Designed to match on SHT1x SMD type sensors

• Optimized on response time of sensor

Dimensions

Figure 1: Drawing of Filter Cap SF1. Dimensions are given in

mm (1mm = 0.039inch), tolerances are ±0.1mm for dimensions

<6mm and ±0.2mm for dimensions >6mm. Cavity inside the cap

fits perfectly to SHT1x sensors. Additional cavities for solder

joints are left open at each side.

Technical Specifications

Parameter Value

Body material Poly Propylene (PP)

Filter material PTFE with polyester scrim

Color White

Operating Range -40 … 100°C

Filter pore size 1.5µm

Filtration efficiency

99.99%

Oleophobic Rating

6 (Scale from 1 – 10)

Mullen Hydrostatic 70kPa, 7m water column

RoHS Compliant

Packaging

Filter Caps SF1 are supplied in stackable plastic trays at

100 units per tray. 4 trays are packed into a bag.

Product Packaging Quantity

Order Number

Filter Cap SF1 Plastic Trays 100 1-100188-01

0.1µm particles at 0.05m/s air flow.

Repellence of oil and hydrocarbons according to AATCC

standard. Rating 6 means n-Decane is repelled.

Product Summary

The Filter Cap SF1 protects SHT1x humidity and

temperature sensors against dust, water immersion and

consequent condensation, 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 is available in white color.

The Filter Cap

is made of a single piece of Polypropylene

(PP) and a filter membrane welded to the single piece.

The Filter Cap is designed to be mounted after soldering

by sticking two pins into hole

s in the PCB and welding it

from back side. 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 provides a waterproof mounting

solution.

2x Ø

1.5

4.2

6.4

10.1

3.7

9.4

2.0

3.7

2.5

4.9

3.2

4.7

Filter Membrane

www.sensirion.com

Version 2.0 – January 2009 2/3

User’s Guide Filter Cap SF1

Mounting Instruction

The Filter Cap SF1 is mounted to the PCB after soldering

SHT1x sensor by sticking the two pins into two openings in

the PCB. The Filter Cap may be fixed by adhesive or by

melting the pins from the back side by heating them up to

at least 160°C by a hot iron or equivalent – compare

Figure 2.

Figure 2: Side view of SF1 Filter Cap mounted between PCB

and housing wall. Volume below membrane is kept minimal.

Dimension and arrangement of the openings in the PCB

are given in Figure 3. Please note that openings must be

wider than pins of cap to compensate for placing tolerance

of sensor.

Figure 3: PCB layout of SHT1x and Filter Cap SF1. Dimensions

are given in mm (1mm = 0.039 inch). Active pads are the ones

on the left side – right side pads may be left floating.

Measures for higher protection

For hermetic seal, adhesive must be added between Filter

Cap, sensor housing and PCB.

Such seal provides higher

security against water leakage, condensation inside the

housing, and corrosion of the soldering pads of the sensor.

Apply the adhesive on the FR4 substrate of the sensor

around the black cap and on the PCB around the sensor

before mounting the Filter Cap. Make sure environment is

well ventilated while adhesive is curing. Adhesive must be

of high viscosity to prevent it from entering the sensor

protection cap.

If corrosion of the solder contacts is a potential problem

then cover the solder joints well with adhesive.

Mounting against housing wall

The Filter Cap SF1 not only protects against dust, water

immersion and large organic molecules, 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.

Please make sure that the housing provides an open rim

for the o-ring; however, specify it tightly to guarantee

hermetic seal.

For such o-rings Sensirion recommends the following

specifications:

• Inner diameter: 6mm

• Cross section: 1mm

• Material: NBR

O-rings are provided for example by Busak & Shamban –

part number OR1000600.

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.

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.

housing

PCB

o-ring

Melted plastic pin

SHT1x

membrane

Part Description: Filter Cap SF1

Customer P/N: 1-100188-01

Quantity: 100 Pcs

Lot No.: WXXXXXXX

Production Date: MM/DD/YYYY

0.8

3.48

1.27

1.8

7.08

No copper in this field

1.27

7.50

1.45

6.67

Filter Cap dimension

0.15

2x Ø1.7

Datasheet Filter Cap SF1

www.sensirion.com Version 2.0 – January 2009 3/3

Revision History

Date Version Page(s) Changes

September 2003 1.0 1 – 5 Initial Release

October 2006 1.1 1 – 5 Add information for seal and o-ring plus sourcing information

January 2009 2.0 1 – 3 New release, rework of datasheet (no changes made to product)

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.

2009, SENSIRION.

CMOSens

is a trademark of Sensirion

Headquarter and Sales Offices

Headquarter

SENSIRION AG Phone: +41 44 306 40 00

Laubisruetistr. 50 Fax: +41 44 306 40 30

CH-8712 Staefa ZH info@sensirion.com

Switzerland http://www.sensirion.com/

Sales Office USA:

SENSIRION Inc. Phone: +1 805 409 4900

2801 Townsgate Rd., Suite 240 Fax: +1 805 435 0467

Westlake Village, CA 91361 michael.karst@sensirion.com

USA http://www.sensirion.com/

Sales Office Japan:

SENSIRION JAPAN Co. Ltd. Phone: +81 3 3444 4940

Postal Code: 108-0074 Fax: +81 3 3444 4939

Shinagawa Station Bldg. 7F, info@sensirion.co.jp

4-23-5, Takanawa, Minato-ku http://www.sensirion.co.jp

Tokyo, Japan

Sales Office Korea:

SENSIRION KOREA Co. Ltd. Phone: +82 31 440 9925~27

#1414, Anyang Construction Tower B/D, Fax: +82 31 440 9927

1112-1, Bisan-dong, Anyang-city info@sensirion.co.kr

Gyeonggi-Province http://www.sensirion.co.kr

South Korea

Sales Office China:

Sensirion China Co. Ltd. phone: +86 755 8252 1501

Room 2411, Main Tower fax: +86 755 8252 1580

Jin Zhong Huan Business Building, info@sensirion.com.cn

Futian District, Shenzhen, www.sensirion.com.cn

Postal Code 518048

PR China

Find your local representative at: http://www.sensirion.com/reps